Skocz do pozycji: 1.

Tytuł:

A backstepping approach to ship course control

Autorzy:

Witkowska, A.
Tomera, M.
Śmierzchalski, R.

Powiązania:

https://bibliotekanauki.pl/articles/911245.pdf

Data publikacji:

2007

Wydawca:

Uniwersytet Zielonogórski. Oficyna Wydawnicza

Tematy:

sterowanie nieliniowe
algorytm genetyczny
sterowanie statkiem
funkcja Lapunowa
backstepping
nonlinear control
genetic algorithms
ship control
Lyapunov function

Opis:

As an object of course control, the ship is characterised by a nonlinear function describing static manoeuvring characteristics that reflect the steady-state relation between the rudder deflection and the rate of turn of the hull. One of the methods which can be used for designing a nonlinear ship course controller is the backstepping method. It is used here for designing two configurations of nonlinear controllers, which are then applied to ship course control. The parameters of the obtained nonlinear control structures are tuned to optimise the operation of the control system. The optimisation is performed using genetic algorithms. The quality of operation of the designed control algorithms is checked in simulation tests performed on the mathematical model of a tanker. In order to obtain reference results to be used for comparison with those recorded for nonlinear controllers designed using the backstepping method, a control system with the PD controller is examined as well.

Źródło:

International Journal of Applied Mathematics and Computer Science; 2007, 17, 1; 73-85
1641-876X
2083-8492

Pojawia się w:

International Journal of Applied Mathematics and Computer Science

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 2.

Tytuł:

A characterization of stability and sensitivity properties for state-constrained optimal control

Autorzy:

Malanowski, K.

Powiązania:

https://bibliotekanauki.pl/articles/970245.pdf

Data publikacji:

2007

Wydawca:

Polska Akademia Nauk. Instytut Badań Systemowych PAN

Tematy:

sterowanie optymalne
optimal control
nonlinear ODEs
state constraints
parametric problems
stability and sensitivity analysis

Opis:

In a series of the recent papers of the author, it was shown that the solutions and Lagrange multipliers of state-constrained optimal control problems are locally Lipschitz continuous and directionally differentiable functions of the parameter, under usual constraint qualifications and weakened second order conditions. In this paper, it is shown that those conditions are not only sufficient, but also necessary. Thus, they consitute a characterization of Lipschitz stability and sensitivity properties for state-constrained optimal control problems.

Źródło:

Control and Cybernetics; 2007, 36, 3; 711-726
0324-8569

Pojawia się w:

Control and Cybernetics

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 3.

Tytuł:

A computationally efficient stable dual-mode type nonlinear predictive control algorithm

Autorzy:

Ławryńczuk, M.
Tadej, W.

Powiązania:

https://bibliotekanauki.pl/articles/971003.pdf

Data publikacji:

2008

Wydawca:

Polska Akademia Nauk. Instytut Badań Systemowych PAN

Tematy:

linearyzacja
optymalizacja
stabilność
nonlinear model predictive control
dual-mode model predictive control
process control
linearisation
optimisation
quadratic programming
stability
constraints
terminal set

Opis:

This paper describes a computationally efficient (sub-optimal) nonlinear predictive control algorithm. The algorithm uses a modified dual-mode approach which guarantees closed-loop stability. In order to reduce the computational burden, instead of online nonlinear optimisation used in the classical dual-mode control scheme, a nonlinear model of the plant is linearised on-line and a quadratic programming problem is solved. Calculation of the terminal set and implementation steps of the algorithm are detailed, especially for input-output models, which are widely used in practice.

Źródło:

Control and Cybernetics; 2008, 37, 1; 99-132
0324-8569

Pojawia się w:

Control and Cybernetics

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 4.

Tytuł:

A control Lyapunov function approach to adaptive control of HIV-1 infection

Autorzy:

Lemos, J. M.
Barao, M. S.

Powiązania:

https://bibliotekanauki.pl/articles/229511.pdf

Data publikacji:

2012

Wydawca:

Polska Akademia Nauk. Czytelnia Czasopism PAN

Tematy:

nonlinear adaptive control
HIV-1 infection
immunology
exact linearization
control Lyapunov function

Opis:

This paper presents an algorithm for nonlinear adaptive control of the viral load in HIV-1 infection. The infection model considered is a reduced complexity nonlinear state-space model with two state variables, that represent the plasma concentration of uninfected and infected CD4+ T-cells of the human immune system. The viral load is assumed to be proportional to the concentration of infected cells. First, a change of variables that exactly linearizes the system is obtained. For the resulting linear system the manipulated variable is obtained by state feedback. To compensate for the uncertainty in the infection parameter of the model an estimator based on a Control Lyapunov Function is designed.

Źródło:

Archives of Control Sciences; 2012, 22, 3; 273-284
1230-2384

Pojawia się w:

Archives of Control Sciences

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 5.

Tytuł:

A Mesh-Independence Principle for Quadratic Penalties Applied to Semilinear Elliptic Boundary Control

Autorzy:

Grossman, Christian
Winkler, Max

Powiązania:

https://bibliotekanauki.pl/articles/1373554.pdf

Data publikacji:

2012

Wydawca:

Uniwersytet Jagielloński. Wydawnictwo Uniwersytetu Jagiellońskiego

Tematy:

optimal boundary control
mesh-independence principle
penalty methods for control constraints
weakly nonlinear elliptic equations

Opis:

The quadratic loss penalty is a well known technique for optimization and control problems to treat constraints. In the present paper they are applied to handle control bounds in a boundary control problems with semilinear elliptic state equations. Unlike in the case of finite dimensional optimization for infinite dimensional problems the order of convergence could only be roughly estimated, but numerical experiments revealed a clearly better convergence behavior with constants independent of the dimension of the used discretization. The main result in the present paper is the proof of sharp convergence bounds for both, the finite und infinite dimensional problem with a mesh-independence in case of the discretization. Further, to achieve an efficient realization of penalty methods the principle of control reduction is applied, i.e. the control variable is represented by the adjoint state variable by means of some nonlinear function. The resulting optimality system this way depends only on the state and adjoint state. This system is discretized by conforming linear finite elements. Numerical experiments show exactly the theoretically predicted behavior of the studied penalty technique.

Źródło:

Schedae Informaticae; 2012, 21; 9-26
0860-0295
2083-8476

Pojawia się w:

Schedae Informaticae

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 6.

Tytuł:

A Method for Constructing ε-value Functions for The Bolza Problem of Optimal Control

Autorzy:

Pustelnik, J.

Powiązania:

https://bibliotekanauki.pl/articles/911140.pdf

Data publikacji:

2005

Wydawca:

Uniwersytet Zielonogórski. Oficyna Wydawnicza

Tematy:

optymalizacja nieliniowa
sterowanie optymalne
równanie Hamiltona-Jacobiego
programowanie dynamiczne
wartość funkcji
nonlinear optimization
Bolza problem
optimal control
Hamilton-Jacobi equation
dynamic programming
value function
approximate minimum

Opis:

The problem considered is that of approximate minimisation of the Bolza problem of optimal control. Starting from Bellman's method of dynamic programming, we define the ε-value function to be an approximation to the value function being a solution to the Hamilton-Jacobi equation. The paper shows an approach that can be used to construct an algorithm for calculating the values of an ε-value function at given points, thus approximating the respective values of the value function.

Źródło:

International Journal of Applied Mathematics and Computer Science; 2005, 15, 2; 177-186
1641-876X
2083-8492

Pojawia się w:

International Journal of Applied Mathematics and Computer Science

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 7.

Tytuł:

A modified filter SQP method as a tool for optimal control of nonlinear systems with spatio-temporal dynamics

Autorzy:

Rafajłowicz, E.
Styczeń, K.
Rafajłowicz, W.

Powiązania:

https://bibliotekanauki.pl/articles/331421.pdf

Data publikacji:

2012

Wydawca:

Uniwersytet Zielonogórski. Oficyna Wydawnicza

Tematy:

programowanie nieliniowe
sterowanie optymalne
równanie różniczkowe cząstkowe
filter approach
nonlinear programming
optimal control
partial differential equations

Opis:

Our aim is to adapt Fletcher's filter approach to solve optimal control problems for systems described by nonlinear Partial Differential Equations (PDEs) with state constraints. To this end, we propose a number of modifications of the filter approach, which are well suited for our purposes. Then, we discuss possible ways of cooperation between the filter method and a PDE solver, and one of them is selected and tested.

Źródło:

International Journal of Applied Mathematics and Computer Science; 2012, 22, 2; 313-326
1641-876X
2083-8492

Pojawia się w:

International Journal of Applied Mathematics and Computer Science

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 8.

Tytuł:

A New Look Adaptation in Active Noise Control Systems
Nowe spojrzenie na adaptację w układach aktywnego tłumienia hałasu

Autorzy:

Figwer, J.
Błażej, M.

Powiązania:

https://bibliotekanauki.pl/articles/151821.pdf

Data publikacji:

2003

Wydawca:

Stowarzyszenie Inżynierów i Techników Mechaników Polskich

Tematy:

adaptacja
układy aktywnego tłumienia hałasu
hałas
tłumienie hałasu
active noise control
chaotic dynamics
adaptive systems
nonlinear systems

Opis:

In the paper a new look at adaptation in active noise control (ANC) systems is presented. The adaptation is interpreted as a nonlinear feedback. This nonlinearity could be manifested in behaviour of ANC systems with occurence of complex periodic and chaoti time-domain responses. Results of real world experiments with adaptive ANC systems used to create a local zone of quiet in a laboratory enclosure showing apparently this behaviour are included.
W artykule przedstawiono nowe spojrzenie na adaptację w układach tłumienia hałasu (ATH). Zwrócono uwagę na to, że adaptacja wprowadza do układu ATH nieliniowe sprzężenie zwrotne, którego konsekwencją jest pojawienie się złożonych okresowych lub chaotycznych odpowiedzi czasowych układów ATH. Zamieszczono przykłady takich odpowiedzi w wyniku doświadczeń laboratoryjnych, w których układy ATH wykorzystywano do tworzenia lokalnych przestrzennych stref ciszy w pomieszczeniu zamkniętym.

Źródło:

Pomiary Automatyka Kontrola; 2003, R. 49, nr 11, 11; 18-21
0032-4140

Pojawia się w:

Pomiary Automatyka Kontrola

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 9.

Tytuł:

A novel method for the design of switching surfaces for discretized MIMO nonlinear systems

Autorzy:

Luis-Delgado, J. D.
Al-Hadithi, B. M.
Jiménez, A.

Powiązania:

https://bibliotekanauki.pl/articles/331143.pdf

Data publikacji:

2017

Wydawca:

Uniwersytet Zielonogórski. Oficyna Wydawnicza

Tematy:

discrete sliding mode
variable structure control
nonlinear control
optimal control
MIMO system
sterowanie dyskretne
sterowanie ślizgowe
sterowanie o zmiennej strukturze
sterowanie nieliniowe
sterowanie optymalne
system MIMO

Opis:

Designing variable structure control with sliding mode (VSC-SM) control schemes needs a switching function or a sliding surface which guarantees the global stability of the closed-loop system. Despite the fact that a wide range of design approaches has been proposed for solving this mathematical problem, the number of proposed methodologies for nonlinear systems is not very extensive, especially for discrete time nonlinear MIMO systems, and most of them require some coordinate system transformation. Therefore, it is not an easy task to find a design scheme that can be applied to discrete time nonlinear MIMO systems. The proposed methodology introduces a mathematical tool: a switching surface equation for a class of MIMO nonlinear systems through an explicit equation without any coordinate transformation. This equation makes use of an implicit linearizing process via the Taylor expansion that allows the use of linear procedures for the design of switching surfaces and the forward Euler method to obtain a discrete time dynamics representation. An illustrative example is included to show the advantages of the proposed design methodology.

Źródło:

International Journal of Applied Mathematics and Computer Science; 2017, 27, 1; 5-17
1641-876X
2083-8492

Pojawia się w:

International Journal of Applied Mathematics and Computer Science

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 10.

Tytuł:

A numerically efficient fuzzy MPC algorithm with fast generation of the control signal

Autorzy:

Marusak, Piotr M.

Powiązania:

https://bibliotekanauki.pl/articles/1838187.pdf

Data publikacji:

2021

Wydawca:

Uniwersytet Zielonogórski. Oficyna Wydawnicza

Tematy:

model predictive control
fuzzy system
fuzzy control
nonlinear control
sterowanie predykcyjne
system rozmyty
sterowanie rozmyte
sterowanie nieliniowe

Opis:

Model predictive control (MPC) algorithms are widely used in practical applications. They are usually formulated as optimization problems. If a model used for prediction is linear (or linearized on-line), then the optimization problem is a standard, i.e., quadratic, one. Otherwise, it is a nonlinear, in general, nonconvex optimization problem. In the latter case, numerical problems may occur during solving this problem, and the time needed to calculate control signals cannot be determined. Therefore, approaches based on linear or linearized models are preferred in practical applications. A novel, fuzzy, numerically efficient MPC algorithm is proposed in the paper. It can offer better performance than the algorithms based on linear models, and very close to that of the algorithms based on nonlinear optimization. Its main advantage is the short time needed to calculate the control value at each sampling instant compared with optimization-based numerical algorithms; it is a combination of analytical and numerical versions of MPC algorithms. The efficiency of the proposed approach is demonstrated using control systems of two nonlinear control plants: the first one is a chemical CSTR reactor with a van de Vusse reaction, and the second one is a pH reactor.

Źródło:

International Journal of Applied Mathematics and Computer Science; 2021, 31, 1; 59-71
1641-876X
2083-8492

Pojawia się w:

International Journal of Applied Mathematics and Computer Science

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 11.

Tytuł:

A robust model free controller for a class of SISO nonaffine nonlinear systems: Application to an electropneumatic actuator

Autorzy:

Boubakir, Ahsene
Labiod, Salim
Boudjema, Fares

Powiązania:

https://bibliotekanauki.pl/articles/229193.pdf

Data publikacji:

2019

Wydawca:

Polska Akademia Nauk. Czytelnia Czasopism PAN

Tematy:

dynamic inversion control
model free controller
nonaffine nonlinear systems
singular perturbation theory

Opis:

This paper presents a robust model free controller (RMFC) for a class of uncertain continuous-time single-input single-output (SISO) minimum-phase nonaffine-in-control systems. Firstly, the existence of an unknown dynamic inversion controller that can achieve control objectives is demonstrated. Afterwards, a fast approximator is designed to estimate as best as possible this dynamic inversion controller. The proposed robust model free controller is an equivalent realization of the designed fast approximator. The perturbation theory and Tikhonov’s theorem are used to analyze the stability of the overall closed-loop system. The performance of the developped controller are verified experimentally in the position control of a pneumatic actuator system.

Źródło:

Archives of Control Sciences; 2019, 29, 3; 437-458
1230-2384

Pojawia się w:

Archives of Control Sciences

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 12.

Tytuł:

A stability based neural networks controller design method

Autorzy:

Song, J.
Xu, X.
He, X.

Powiązania:

https://bibliotekanauki.pl/articles/206120.pdf

Data publikacji:

1998

Wydawca:

Polska Akademia Nauk. Instytut Badań Systemowych PAN

Tematy:

sieć neuronowa
stabilność
sterowanie nieliniowe
neural networks control
nonlinear control
sliding mode
stability

Opis:

The use of neural networks in control systems can be seen as a natural step in the evolution of control methodology to meet new challenges. Many attempts have been made to apply the neural networks to deal with non-linearities and uncertainties of the control systems. Research in neural network applications to control can be classified according to the major methods depending on structures of the control system, such as NN-based NON-linear System Identification, NN-based Supervised Control, NN-based Direct Control, NN-based Indirect Control, NN-based Adaptive Control, NN-based Self-learning Control, NN-based Fuzzy Control, and NN Variable Structure Control. All these control methods cannot, however, effectively guarantee system stability, i.e. none of these neural network controls, except for NN-based Variable Structure Control, is based on system stability. This also limits the application and development of the neural networks in control theory. The paper shows the effort to solve this difficulty and give a way for the design method of the stability based neural networks controller using Lyapunov second stability theorem. This kind of controller can not only guarantee system stability, but also fully compensate for the influence of system uncertainties and non-linearities.Simulation results also show the effectiveness of the controller.

Źródło:

Control and Cybernetics; 1998, 27, 1; 119-133
0324-8569

Pojawia się w:

Control and Cybernetics

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 13.

Tytuł:

A stabilization method of inhomogeneous ladder networks with nonlinear elements

Autorzy:

Skruch, P.

Powiązania:

https://bibliotekanauki.pl/articles/229983.pdf

Data publikacji:

2011

Wydawca:

Polska Akademia Nauk. Czytelnia Czasopism PAN

Tematy:

electric ladder network
nonlinear circuit
stabilization
feedback control

Opis:

In the paper, different structures of electric ladder networks are considered: RC, RL, and RLC. Such systems are composed of resistors, inductors and capacitors connected in series. The elements of the network are not identical and have nonlinear characteristics. The network's dynamic behavior can be mathematically described by nonlinear differential equations. A class of robust feedback controls is designed to stabilize the system. The asymptotic stability of the closed-loop system is analyzed and proved by the use of Lyapunov functionals and LaSalle's invariance principle. The results of computer simulations are included to verify theoretical analysis and mathematical formulation.

Źródło:

Archives of Control Sciences; 2011, 21, 3; 313-329
1230-2384

Pojawia się w:

Archives of Control Sciences

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 14.

Tytuł:

A sufficient condition for small-time local attainability of a set

Autorzy:

Krastanov, M.

Powiązania:

https://bibliotekanauki.pl/articles/205840.pdf

Data publikacji:

2002

Wydawca:

Polska Akademia Nauk. Instytut Badań Systemowych PAN

Tematy:

nieliniowy system sterowania
nonlinear control systems
small-time local attainability of a set

Opis:

The notion of small-time local attainability (STLA) of a closed set with respect to a nonlinear control system is discussed and a new sufficient STLA condition is proved.

Źródło:

Control and Cybernetics; 2002, 31, 3; 739-750
0324-8569

Pojawia się w:

Control and Cybernetics

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 15.

Tytuł:

Active fault tolerant control of nonlinear systems: the cart-pole example

Autorzy:

Bonfe, M.
Castaldi, P.
Mimmo, N.
Simani, S.

Powiązania:

https://bibliotekanauki.pl/articles/907604.pdf

Data publikacji:

2011

Wydawca:

Uniwersytet Zielonogórski. Oficyna Wydawnicza

Tematy:

detekcja uszkodzeń
lokalizacja uszkodzeń
filtracja nieliniowa
sterowanie tolerujące uszkodzenia
fault detection
fault isolation
nonlinear filter
nonlinear geometric approach
fault tolerant control
cart pole nonlinear model

Opis:

This paper describes the design of fault diagnosis and active fault tolerant control schemes that can be developed for nonlinear systems. The methodology is based on a fault detection and diagnosis procedure relying on adaptive filters designed via the nonlinear geometric approach, which allows obtaining the disturbance de-coupling property. The controller reconfiguration exploits directly the on-line estimate of the fault signal. The classical model of an inverted pendulum on a cart is considered as an application example, in order to highlight the complete design procedure, including the mathematical aspects of the nonlinear disturbance de-coupling method based on the nonlinear differential geometry, as well as the feasibility and efficiency of the proposed approach. Extensive simulations of the benchmark process and Monte Carlo analysis are practical tools for assessing experimentally the robustness and stability properties of the developed fault tolerant control scheme, in the presence of modelling and measurement errors. The fault tolerant control method is also compared with a different approach relying on sliding mode control, in order to evaluate benefits and drawbacks of both techniques. This comparison highlights that the proposed design methodology can constitute a reliable and robust approach for application to real nonlinear processes.

Źródło:

International Journal of Applied Mathematics and Computer Science; 2011, 21, 3; 441-455
1641-876X
2083-8492

Pojawia się w:

International Journal of Applied Mathematics and Computer Science

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 16.

Tytuł:

Active Noise Control Algorithm Based on a Neural Network and Nonlinear Input-Output System Identification Model

Autorzy:

Krukowicz, T.

Powiązania:

https://bibliotekanauki.pl/articles/178040.pdf

Data publikacji:

2010

Wydawca:

Polska Akademia Nauk. Czytelnia Czasopism PAN

Tematy:

active noise control
neural network
system identification
nonlinear phenomena

Opis:

The development of digital signal processors and the increase in their computing capabilities bring opportunities to employ algorithms with multiple variable parameters in active noise control systems. Of particular interest are the algorithms based on artificial neural networks. This paper presents an active noise control algorithm based on a neural network and a nonlinear input-output system identification model. The purpose of the algorithm is an active noise control system with a nonlinear primary path. The algorithm uses the NARMAX system identification model. The neural network employed in the proposed algorithm is a multilayer perceptron. The error backpropagation rule with adaptive learning rate is employed to update the weight of the neural network. The performance of the proposed algorithm has been tested by numerical simulations. Results for narrow-band input signals and nonlinear primary path are presented below.

Źródło:

Archives of Acoustics; 2010, 35, 2; 191-202
0137-5075

Pojawia się w:

Archives of Acoustics

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 17.

Tytuł:

Active noise control with a single nonlinear control filter for a vibrating plate with multiple actuators

Autorzy:

Mazur, K.
Pawełczyk, M.

Powiązania:

https://bibliotekanauki.pl/articles/176906.pdf

Data publikacji:

2013

Wydawca:

Polska Akademia Nauk. Czytelnia Czasopism PAN

Tematy:

active noise-vibration control
active structural acoustic control
adaptive control
nonlinear control

Opis:

Vibrating plates can be used in Active Noise Control (ANC) applications as active barriers or as secondary sources replacing classical loudspeakers. The system with vibrating plates, especially when nonlinear MFC actuators are used, is nonlinear. The nonlinearity in the system reduces performance of classical feedforward ANC with linear control filters systems, because they cannot cope with harmonics generated by the nonlinearity. The performance of the ANC system can be improved by using nonlinear control filters, such as Artificial Neural Networks or Volterra filters. However, when multiple actuators are mounted on a single plate, which is a common practice to provide effective control of more vibration modes, each actuator should be driven by a dedicated nonlinear control filter. This significantly increases computational complexity of the control algorithm, because adaptation of nonlinear control filters is much more computationally demanding than adaptation of linear FIR filters. This paper presents an ANC system with multiple actuators, which are driven with a single nonlinear filter. To avoid destructive interference of vibrations generated by different actuators the control signal is filtered by appropriate separate linear filters. The control system is experimentally verified and obtained results are reported.

Źródło:

Archives of Acoustics; 2013, 38, 4; 537-545
0137-5075

Pojawia się w:

Archives of Acoustics

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 18.

Tytuł:

Active vibration control of Terfenol-D rod of giant magnetostrictive actuator with nonlinear constitutive relations
Aktywne sterowanie drganiami w wielkim aktuatorze magnetostrykcyjnym z rdzeniem typu Terfenol-D przy uwzględnieniu nieliniowych równań konstytutywnych

Autorzy:

Zhou, H-M.
Zhou, Y-H.
Zheng, X. J.

Powiązania:

https://bibliotekanauki.pl/articles/281451.pdf

Data publikacji:

2007

Wydawca:

Polskie Towarzystwo Mechaniki Teoretycznej i Stosowanej

Tematy:

aktuator wielki magnetostrykcyjny
nieliniowe równania konstytutywne
analiza tłumienia drgań
giant magnetostrictive actuators
nonlinear constitutive model
negative feedback control law
active control of vibration suppression

Opis:

This paper presents a numerical simulation of active vibration control of the Terfenol-D rad of a giant magnetostrictive transducer with nonlinear constitutive relations. In this control system, the goal is to suppress vibration of the displacement at the free end of the rod that is usually connected with a platform. Due to the inherent nonlinear relation among the applied magnetic field, pre-stress, and strain, the extension of the rod is also nonlinear relative to the external applications. Having an analytieal nonlinear constitutive model of the Terfenol-D rod proposed by the last author of this paper and the finite element method employed in the deformation analysis, we propose a numerical code to simulate the dynamic behavior of the control system when the negative displacement and velocity control law is utilized to feed back the signals to the actuator. The simulation results display that this control is more effective that other existing control algorithms based on linear constitutive models.
W pracy zaprezentowano symulacje numeryczne aktywnego sterowania za pomocą wielkiego aktuatora magnetostrykcyjnego zawierającego rdzeń wykonany z Terfenolu-D opisanego nieliniowymi zależnościami konstytutywnymi. Celem rozważań jest analiza tłumienia drgań swobodnego końca pręta, zwykle łączonego z platformą. Wydłużenie pręta jest opisane nieliniowym równaniem z powodu nieliniowych relacji pomiędzy przykładanym polem magnetycznym, naprężeniami wstępnymi oraz odkształceniami. Po sformułowaniu przez ostatniego Autora niniejszej pracy modelu pręta z Terfenolu-D oraz zastosowaniu metody elementów skończonych, wprowadzono procedurę numeryczną o symulacji dynamiki układu sterowania z ujemnym sprzężeniem zwrotnym ze względu na przemieszczenie i prędkość końca aktuatora. Wyniki badań pokazały, że tego typu sterowanie staje się bardziej efektywne niż inne strategie redukcji drgań oparte na modelach liniowych.

Źródło:

Journal of Theoretical and Applied Mechanics; 2007, 45, 4; 953-967
1429-2955

Pojawia się w:

Journal of Theoretical and Applied Mechanics

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 19.

Tytuł:

Actuator fault tolerance in control systems with predictive constrained set-point optimizers

Autorzy:

Marusak, P. M.
Tatjewski, P.

Powiązania:

https://bibliotekanauki.pl/articles/929879.pdf

Data publikacji:

2008

Wydawca:

Uniwersytet Zielonogórski. Oficyna Wydawnicza

Tematy:

sterowanie odporne na błędy
sterowanie predykcyjne
optymalizacja
system nieliniowy
fault tolerant control
model predictive control
set-point optimization
nonlinear system

Opis:

Mechanisms of fault tolerance to actuator faults in a control structure with a predictive constrained set-point optimizer are proposed. The structure considered consists of a basic feedback control layer and a local supervisory set-point optimizer which executes as frequently as the feedback controllers do with the aim to recalculate the set-points both for constraint feasibility and economic performance. The main goal of the presented reconfiguration mechanisms activated in response to an actuator blockade is to continue the operation of the control system with the fault, until it is fixed. This may be even long-term, if additional manipulated variables are available. The mechanisms are relatively simple and consist in the reconfiguration of the model structure and the introduction of appropriate constraints into the optimization problem of the optimizer, thus not affecting the numerical effectiveness. Simulation results of the presented control system for a multivariable plant are provided, illustrating the efficiency of the proposed approach.

Źródło:

International Journal of Applied Mathematics and Computer Science; 2008, 18, 4; 539-551
1641-876X
2083-8492

Pojawia się w:

International Journal of Applied Mathematics and Computer Science

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 20.

Tytuł:

Adaptacyjny regulator kursu statku z zastosowaniem metody backstepping
Adaptive ship course controller with use of the backstepping method

Autorzy:

Witkowska, A.
Śmierzchalski, R.

Powiązania:

https://bibliotekanauki.pl/articles/157277.pdf

Data publikacji:

2012

Wydawca:

Stowarzyszenie Inżynierów i Techników Mechaników Polskich

Tematy:

autopilot
sterowanie adaptacyjne
backstepping
projektowanie prawa sterowania
adaptive control
nonlinear control
backstepping method
genetic algorithm

Opis:

W układach morskich aplikacja nieliniowych technik adaptacyjnych do sterowania ruchem statku jest obecnie niezbędna aby uwzględnić występujące niepewności strukturalne i parametryczne. Jest to szczególnie istotne, ponieważ dynamika statku zależy od dużej masy i wpływu zakłóceń środowiskowych zarówno addytywnych jak i multiplikatywnych, wywołanych przez fale, wiatry i prądy oceaniczne. Artykuł obejmuje zagadnienie projektowania adaptacyjnego układu regulacji kursem statku morskiego. Zaproponowany algorytm sterowania opiera się na adaptacyjnej metodzie backstepping z prawem adaptacji parametrów modelu statku wyprowadzonym w oparciu o teorię II funkcji Lapunowa. W artykule została przeprowadzona analiza poprawności oraz jakości zaprojektowanego regulatora adaptacyjnego. Zbadano zdolność śledzenia zmian wartości zadanej kursu oraz zbieżność do rzeczywistych wartości parametrów. Istotnym problemem w metodzie backstepping jest uwzględnienie na etapie projektowania, urządzenia wykonawczo-sterującego jakim jest maszyna sterowa, ze względu na nieliniową dynamikę opisaną za pomocą nieliniowości z nasyceniem. Algorytmy sterowania dostępne zarówno w literaturze jak i zastosowaniach morskich zazwyczaj zaniedbują dynamikę maszyny sterowej. Przy opracowaniu algorytmu sterowania przyjęty został uproszczony model matematyczny dynamiki statku, natomiast badania symulacyjne wykonano z pełnowymiarowym modelem statku typu B-481.
The paper deals with issues concerning the advanced ship course control system. The control algorithm suggested in the work is based on the backstepping method and a genetic algorithm. The ship course adaptive controller configuration was designed with use of the backstepping procedure [see section 2]. The controller version (17) includes the adaptation block of ship model parameters (23)-(25). The adaptation of ship model parameters to the updating law derived on a basis of II Function Lyapunov theory enables us to obtain good adaptation properties of the system in the presence of the so-called parametric uncertainties, e.g. connected with the influence of environmental disturbances, such as wind or a sea wave. The adjustable parameters of the obtained nonlinear steering structures (Fig. 1.) were tuned up in order to optimize the system operation. A genetic algorithm was used for optimization. The quality of operation of the obtained steering structures was analyzed by conducting simulation experiments on a simplified (1)-(4) and complex simulation model of a ship of type B-481, [see Sections 3,4]. The results of computer simulation experiments showed the high quality of control and system stability of such steering (Figs. 2, 3, 4). The considered system realizes basic tasks, such as: stabilization of the system, the tuning of controller amplification, adaptation of the system to changing environmental conditions.

Źródło:

Pomiary Automatyka Kontrola; 2012, R. 58, nr 8, 8; 750-753
0032-4140

Pojawia się w:

Pomiary Automatyka Kontrola

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 21.

Tytuł:

Adaptacyjny regulator LQR w układzie sterowania kątem kursowym i prędkością statku opisanego nieliniowym modelem dynamicznym MIMO
Adaptative LQR course-keeping controller for the nonlinear MIMO model of a container vessel

Autorzy:

Brasel, M.

Powiązania:

https://bibliotekanauki.pl/articles/408076.pdf

Data publikacji:

2014

Wydawca:

Politechnika Lubelska. Wydawnictwo Politechniki Lubelskiej

Tematy:

sterowanie optymalne
sterowanie adaptacyjne
obiekty nieliniowe
nieliniowy model statku
optimal control
adaptive control
nonlinear systems
nonlinear model of a ship

Opis:

W artykule zaprezentowano adaptacyjny układ sterowania kątem kursowym i prędkością statku opisanego nieliniowym modelem dynamicznym MIMO (ang. Multi-input, Multi-Output) o czterech stopniach swobody ruchu (ang. Four-Degrees-of-Freedom, 4-DoF). Przedstawiony model statku jest silnie nieliniowy i uwzględnia nie tylko ograniczenia saturacyjne sygnałów sterujących ale także dynamikę maszyny sterowej i napędu głównego. Głównym zadaniem zaprojektowanego adaptacyjnego regulatora LQR jest sterowanie kątem kursowym statku i jego prędkością względem wody. Poszczególne zestawy parametrów regulatora użyte w procesie adaptacji zostały wyznaczone na podstawie linearyzacji modelu statku w wybranych nominalnych punktach pracy. W końcowej części artykułu przedstawiono wyniki badań symulacyjnych zaprojektowanego regulatora w układzie z pełnym nieliniowym modelem statku.
In the paper an adaptive control system for the nonlinear 4-DoF model of a container vessel is presented. The considered model of the ship includes input signals saturations and dynamics of actuators. Main goal of the presented control system is control of the course angle and speed of the ship relative to water. The system synthesis is carried out by means of LQ-optimal control method. Sets of controller parameters are designed using linearization of the considered model in the nominal steady-state operating points of the ship. The final part of the paper includes simulation results of control system operation with full nonlinear MIMO model of the container vessel.

Źródło:

Informatyka, Automatyka, Pomiary w Gospodarce i Ochronie Środowiska; 2014, 2; 49-52
2083-0157
2391-6761

Pojawia się w:

Informatyka, Automatyka, Pomiary w Gospodarce i Ochronie Środowiska

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 22.

Tytuł:

Adaptive control scheme based on the least squares support vector machine network

Autorzy:

Mahmoud, T. K.

Powiązania:

https://bibliotekanauki.pl/articles/930155.pdf

Data publikacji:

2011

Wydawca:

Uniwersytet Zielonogórski. Oficyna Wydawnicza

Tematy:

modelowanie systemu
system nieliniowy
system sterowania
sieć neuronowa
maszyna wektorów wspierających
support vector machine (SVM)
neural network
nonlinear system modeling
nonlinear system control
pH control

Opis:

Recently, a new type of neural networks called Least Squares Support Vector Machines (LS-SVMs) has been receiving increasing attention in nonlinear system identification and control due to its generalization performance. This paper develops a stable adaptive control scheme using the LS-SVM network. The developed control scheme includes two parts: the identification part that uses a modified structure of LS-SVM neural networks called the multi-resolution wavelet least squares support vector machine network (MRWLS-SVM) as a predictor model, and the controller part that is developed to track a reference trajectory. By means of the Lyapunov stability criterion, stability analysis for the tracking errors is performed. Finally, simulation studies are performed to demonstrate the capability of the developed approach in controlling a pH process.

Źródło:

International Journal of Applied Mathematics and Computer Science; 2011, 21, 4; 685-696
1641-876X
2083-8492

Pojawia się w:

International Journal of Applied Mathematics and Computer Science

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 23.

Tytuł:

Adaptive, nonlinear state transformation-based control of motion in presence of hard constraints

Autorzy:

Kabziński, J.
Mosiołek, P.

Powiązania:

https://bibliotekanauki.pl/articles/201256.pdf

Data publikacji:

2020

Wydawca:

Polska Akademia Nauk. Czytelnia Czasopism PAN

Tematy:

motion control
nonlinear control
adaptive control
state constraints

Opis:

The paper describes a nonlinear controller design technique applied to a servo drive in the presence of hard state constraints. The approach presented is based on nonlinear state-space transformation and adaptive backstepping. It allows us to impose hard constraints on the state variables directly and to achieve asymptotic tracking of any reference trajectory inside the constraints, despite unknown plant parameters. Two control schemes (with and without integral action) are derived, investigated and then compared. Several examples demonstrate the main features of the design procedure and prove that it may be applied in case of motion control problems in electric drive automation.

Źródło:

Bulletin of the Polish Academy of Sciences. Technical Sciences; 2020, 68, 5; 963--971
0239-7528

Pojawia się w:

Bulletin of the Polish Academy of Sciences. Technical Sciences

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 24.

Tytuł:

Adaptive Process Control in Rubber industry

Autorzy:

Brause, R. W.
Pietruschka, U.

Powiązania:

https://bibliotekanauki.pl/articles/90854.pdf

Data publikacji:

1998

Wydawca:

Centralny Instytut Ochrony Pracy

Tematy:

extruder mask estimation
nonlinear adaptive control
neural networks
rubber production automatisation
knowledge accumulation
sieci neuronowe
przemysł gumowy
nieliniowe sterowanie adaptacyjne

Opis:

This paper describes the problems and an adaptive solution for process control in rubber industry. We show that the human and economical benefits of an adaptive solution for the approximation of process parameters are very attractive. The modeling of the industrial problem is done by the means of artificial neural networks. For the example of the extrusion of a rubber profile in tire production our method shows good resuits even using only a few training samples.

Źródło:

International Journal of Occupational Safety and Ergonomics; 1998, 4, 3; 253-269
1080-3548

Pojawia się w:

International Journal of Occupational Safety and Ergonomics

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 25.

Tytuł:

Algorytm regulacji odpornej ADRC - dobór nastaw i sposób dyskretnej implementacji
Robust ADRC Control - Tuning and Discrete Implementation

Autorzy:

Michalski, Jacek
Kozierski, Piotr
Retinger, Marek
Puchalski, Radosław

Powiązania:

https://bibliotekanauki.pl/articles/2090883.pdf

Data publikacji:

2022

Wydawca:

Sieć Badawcza Łukasiewicz - Przemysłowy Instytut Automatyki i Pomiarów

Tematy:

sterowanie ADRC
regulator PID
sprzężenie od stanu
rozszerzony obserwator stanu
dobór nastaw
wielowymiarowy obiekt nieliniowy
ADRC control
PID controller
state feedback
extended state observer
tuning methods
multidimensional nonlinear system

Opis:

W niniejszej pracy został przedstawiony algorytm regulacji odpornej Active Disturbance Rejection Control obiektem aerodynamicznym o dwóch stopniach swobody. Pokazano pełne wyprowadzenia równań algorytmu regulacji oraz wartości nastaw w zależności od pożądanych właściwości układu, na podstawie dynamiki obiektu oscylacyjnego drugiego rzędu. Dokonano dyskretyzacji równań algorytmu regulacji i zaproponowano jego dyskretną implementację. Testy przeprowadzono na laboratoryjnym zestawie aerodynamicznym firmy Inteco, którego model matematyczny jest silnie nieliniowy, ma dwa stopnie swobody i sprzężenia skrośne. Jakość działania oceniona została na podstawie przebiegów czasowych, a także całkowych wskaźników jakości. Przeprowadzone badania pokazują przewagę zastosowanego algorytmu nad regulacja PID dla badanego systemu. Przedstawiony algorytm regulacji cechuje się także większą przenośnością - nastawy dobierane są tylko w oparciu o rząd obiektu i teoretycznie raz dobrane są właściwe, niezależnie od modelu matematycznego. Zaproponowane równania dyskretne mogą zostać zaimplementowane z użyciem dowolnego języka programowania dla teoretycznie dowolnego obiektu, przy uwzględnieniu rzędu jego dynamiki.
This paper presents the robust Active Disturbance Rejection Control method in an aerodynamical object with two degrees of freedom. Full derivation of control algorithm equations and the settings values depending on the desired properties of the system, based on the dynamics of the second order oscillating object, have been shown. The equations of the control algorithm were discretized and its discrete implementation was proposed. The tests were carried out on the Inteco aerodynamical laboratory kit, whose mathematical model is strongly non-linear, has two degrees of freedom and crosscoupling. The quality of operation was assessed on the basis of time graphs as well as integral quality indices. The conducted research shows the advantage of the applied algorithm over PID control for the tested system. The presented control algorithm is also more portable - the settings are selected only on the basis of the object order and once selected are correct regardless of the mathematical model. The proposed discrete equations can be implemented using any programming language theoretically for any object, taking into account the order of its dynamics.

Źródło:

Pomiary Automatyka Robotyka; 2022, 26, 2; 5--13
1427-9126

Pojawia się w:

Pomiary Automatyka Robotyka

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 26.

Tytuł:

An adaptive output feedback motion tracking controller for robot manipulators: Uniform global asymptotic stability and experimentation

Autorzy:

Yarza, A.
Santibanez, V.
Moreno-Valenzuela, J.

Powiązania:

https://bibliotekanauki.pl/articles/330314.pdf

Data publikacji:

2013

Wydawca:

Uniwersytet Zielonogórski. Oficyna Wydawnicza

Tematy:

adaptive control
robot control
nonlinear control
output feedback
Lyapunov UGAS stability
sterowanie adaptacyjne
sterowanie robotem
sterowanie nieliniowe
sprzężenie zwrotne
stabilność Lyapunova

Opis:

This paper deals with two important practical problems in motion control of robot manipulators: the measurement of joint velocities, which often results in noisy signals, and the uncertainty of parameters of the dynamic model. Adaptive output feedback controllers have been proposed in the literature in order to deal with these problems. In this paper, we prove for the first time that Uniform Global Asymptotic Stability (UGAS) can be obtained from an adaptive output feedback tracking controller, if the reference trajectory is selected in such a way that the regression matrix is persistently exciting. The new scheme has been experimentally implemented with the aim of confirming the theoretical results.

Źródło:

International Journal of Applied Mathematics and Computer Science; 2013, 23, 3; 599-611
1641-876X
2083-8492

Pojawia się w:

International Journal of Applied Mathematics and Computer Science

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 27.

Tytuł:

An Algorithm for Construction of varepsilon-Value Functions for the Bolza Control Problem

Autorzy:

Jacewicz, E.

Powiązania:

https://bibliotekanauki.pl/articles/908335.pdf

Data publikacji:

2001

Wydawca:

Uniwersytet Zielonogórski. Oficyna Wydawnicza

Tematy:

optymalizacja nieliniowa
sterowanie optymalne
nonlinear optimization
Bolza problem
optimal control
Hamilton-Jacobi equation
dynamic programming
varepsilon-value function
approximate minimum

Opis:

The problem considered is that of approximate numerical minimisation of the non-linear control problem of Bolza. Starting from the classical dynamic programming method of Bellman, an varepsilon-value function is defined as an approximation for the value function being a solution to the Hamilton-Jacobi equation. The paper shows how an varepsilon-value function which maintains suitable properties analogous to the original Hamilton-Jacobi value function can be constructed using a stable numerical algorithm. The paper shows the numerical closeness of the approximate minimum to the infimum of the Bolza functional.

Źródło:

International Journal of Applied Mathematics and Computer Science; 2001, 11, 2; 391-428
1641-876X
2083-8492

Pojawia się w:

International Journal of Applied Mathematics and Computer Science

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 28.

Tytuł:

An efficient microgrid model based on Markov fuzzy demand-side management

Autorzy:

Jabash Samuel, G. K.
Sivagama Sundari, M. S.
Bhavani, R.
Jasmine Gnanamalar, A.

Powiązania:

https://bibliotekanauki.pl/articles/27311444.pdf

Data publikacji:

2023

Wydawca:

Polska Akademia Nauk. Czasopisma i Monografie PAN

Tematy:

smart grid
fuzzy Markov decision process
power scheduling
operating cost
nonlinear model predictive control
inteligentna sieć
planowanie mocy
koszt operacyjny
proces decyzyjny Markowa rozmyty
regulator predykcyjny nieliniowego modelu

Opis:

Today’s electricity management mainly focuses on smart grid implementation for better power utilization. Supply-demand balancing, and high operating costs are still considered the most challenging factors in the smart grid. To overcome this drawback, a Markov fuzzy real-time demand-side manager (MARKOV FRDSM) is proposed to reduce the operating cost of the smart grid system and maintain a supply-demand balance in an uncertain environment. In addition, a non-linear model predictive controller (NMPC) is designed to give a global solution to the non-linear optimization problem with real-time requirements based on the uncertainties over the forecasted load demands and current load status. The proposed MARKOV FRDSM provides a faster scale power allocation concerning fuzzy optimization and deals with uncertainties and imprecision. The implemented results show the proposed MARKOV FRDSM model reduces the cost of operation of the microgrid by 1.95%, 1.16%, and 1.09% than the existing method such as differential evolution and real coded genetic algorithm and maintains the supply-demand balance in the microgrid.

Źródło:

Bulletin of the Polish Academy of Sciences. Technical Sciences; 2023, 71, 3; art. no. e145569
0239-7528

Pojawia się w:

Bulletin of the Polish Academy of Sciences. Technical Sciences

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 29.

Tytuł:

An improved dynamic surface sliding mode method for autonomous cooperative formation control of underactuated USVS with complex marine environment disturbances

Autorzy:

Dong, Zaopeng
Qi, Shijie
Yu, Min
Zhang, Zhengqi
Zhang, Haisheng
Li, Jiakang
Liu, Yang

Powiązania:

https://bibliotekanauki.pl/articles/32909478.pdf

Data publikacji:

2022

Wydawca:

Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa

Tematy:

underactuated USV
dynamic surface sliding mode control
lateral velocity tracking differentiator
nonlinear disturbance observer

Opis:

In this paper, a novel dynamic surface sliding mode control (DSSMC) method, combined with a lateral velocity tracking differentiator (LVTD), is proposed for the cooperative formation control of underactuated unmanned surface vehicles (USVs) exposed to complex marine environment disturbances. Firstly, in view of the kinematic and dynamic models of USVs and the design idea of a virtual control law in a backstepping approach, the trajectory tracking control problem of USVs’ cooperative formation is transformed into a stabilisation problem of the virtual control law of longitudinal and lateral velocities. Then, aiming at the problem of differential explosion caused by repeated derivation in the process of backstepping design, the first-order low-pass filter about the virtual longitudinal velocity and intermediate state quantity of position is constructed to replace differential calculations during the design of the control law, respectively. In order to reduce the steady-state error when stabilising the virtual lateral velocity control law, the integral term is introduced into the design of the sliding mode surface with a lateral velocity error, and then the second-order sliding mode surface with an integral is structured. In addition, due to the problem of controller oscillation and the role of the tracking differentiator (TD) in active disturbance rejection control (ADRC), the LVTD is designed to smooth the state quantity of lateral velocity. Subsequently, based on the dynamic model of USV under complex marine environment disturbances, the nonlinear disturbance observer is designed to observe the disturbances and compensate the control law. Finally, the whole cooperative formation system is proved to be uniformly and ultimately bounded, according to the Lyapunov stability theory, and the stability and validity of the method is also verified by the simulation results.

Źródło:

Polish Maritime Research; 2022, 3; 47-60
1233-2585

Pojawia się w:

Polish Maritime Research

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 30.

Tytuł:

Analysis, adaptive control and circuit simulation of a novel finance system with dissaving

Autorzy:

Tacha, O. I.
Volos, C. K.
Stouboulos, I. N.
Kyprianidis, I. M.

Powiązania:

https://bibliotekanauki.pl/articles/229959.pdf

Data publikacji:

2016

Wydawca:

Polska Akademia Nauk. Czytelnia Czasopism PAN

Tematy:

chaotic finance system
dissaving
bifurcation diagram
Lyapunov exponent
phase portrait
adaptive control
nonlinear circuit

Opis:

In this paper a novel 3-D nonlinear finance chaotic system consisting of two nonlinearities with negative saving term, which is called ‘dissaving’ is presented. The dynamical analysis of the proposed system confirms its complex dynamic behavior, which is studied by using wellknown simulation tools of nonlinear theory, such as the bifurcation diagram, Lyapunov exponents and phase portraits. Also, some interesting phenomena related with nonlinear theory are observed, such as route to chaos through a period doubling sequence and crisis phenomena. In addition, an interesting scheme of adaptive control of finance system’s behavior is presented. Furthermore, the novel nonlinear finance system is emulated by an electronic circuit and its dynamical behavior is studied by using the electronic simulation package Cadence OrCAD in order to confirm the feasibility of the theoretical model.

Źródło:

Archives of Control Sciences; 2016, 26, 1; 95-115
1230-2384

Pojawia się w:

Archives of Control Sciences

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 31.

Tytuł:

Analysis and control of nonlinear vibration of autonomous vehicle passing through hybrid consecutive speed control humps

Autorzy:

Yang, Zhiyong
Wang, Long
Yu, Yanjun
Mou, Zhenping
Ou, Minghui

Powiązania:

https://bibliotekanauki.pl/articles/2173727.pdf

Data publikacji:

2022

Wydawca:

Polska Akademia Nauk. Czytelnia Czasopism PAN

Tematy:

autonomous vehicles
hybrid consecutive speed control humps
nonlinear vibration
safety
comfort
pojazd autonomiczny
próg zwalniający
wibracje nieliniowe
bezpieczeństwo
komfort

Opis:

In order to improve the safety and comfort of autonomous vehicles passing through the expressway, relevant departments of expressway construction often design and lay consecutive speed control humps (SCHs) with cross-sections of different shapes according to different road conditions, such as the combination of trapezoidal and sinusoidal SCHs. In this paper, we conduct a study about the nonlinear dynamic characteristics of the autonomous vehicle passing through hybrid SCHs. Firstly, a four-degree-of-freedom (4-DOF) nonlinear model of the vehicle suspension and the speed coupling excitation model under hybrid SCHs are established. Then the fourth-fifth order Runge–Kutta method is used to simulate the nonlinear system, and its nonlinear dynamic characteristics are analyzed. The results show that chaotic motion occurs when the vehicle passes through hybrid SCHs, and the speed range of chaotic motion is obtained. Then, a direct variable feedback control method is used to suppress the chaotic vibration of semi-active suspension vehicles, and the effect is verified by simulation experiments. Finally, this paper presents a multi-objective optimization model based on a genetic algorithm (GA) for active suspension vehicles. The optimization model selects the vertical displacement and pitching angle of the vehicle body as the objective function. The research results of this paper can provide information on the ride comfort’s optimization for autonomous vehicles passing through hybrid SCHs and on the design of vehicle suspension system.

Źródło:

Bulletin of the Polish Academy of Sciences. Technical Sciences; 2022, 70, 6; art. no. e143643
0239-7528

Pojawia się w:

Bulletin of the Polish Academy of Sciences. Technical Sciences

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 32.

Tytuł:

Analysis of a nonlinear tuned mass damper by using the multi-scale method

Autorzy:

Liu, Junfeng
Yao, Ji
Huang, Kun
Zhang, Qing
Ze, Li

Powiązania:

https://bibliotekanauki.pl/articles/2104766.pdf

Data publikacji:

2022

Wydawca:

Polskie Towarzystwo Mechaniki Teoretycznej i Stosowanej

Tematy:

nonlinear characteristics
complex average method
multi-scale method
nonlinear design
control performance

Opis:

A tuned mass damper is a kind of vibration damping device which has been widely used in tall buildings, machinery, bridges, aerospace engineering and other fields. In practical engineering applications, due to large deformation caused by large displacement, errors in engineering constructions and the existence of limit devices, the structure and tuned mass dampers inevitably produce some nonlinear characteristics, but these nonlinearities are often ignored. The results of this study confirm that the nonlinearity of the structure and the mass damper should be considered in the process of optimal frequency design, otherwise there will be a large deviation between the design optimal frequency of the mass damper and the actual optimal frequency. In this paper, nonlinear characteristics of the tuned mass damper and the main structure are considered. The first-order differential equations are obtained by using the complex average method, and the nonlinear equations of the tuned mass damper system are derived by using the multi-scale method. On this basis, the parameters are determined. The numerical results show that the error of the approximate solution method is small in the given example. The nonlinear tuned mass damper with nonlinear design exhibits a better control performance.

Źródło:

Journal of Theoretical and Applied Mechanics; 2022, 60, 3; 463--477
1429-2955

Pojawia się w:

Journal of Theoretical and Applied Mechanics

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 33.

Tytuł:

Analysis of an Isope-Type Dual Algorithm for Optimizing Control and Nonlinear Optimization

Autorzy:

Tadej, W.
Tatjewski, P.

Powiązania:

https://bibliotekanauki.pl/articles/908338.pdf

Data publikacji:

2001

Wydawca:

Uniwersytet Zielonogórski. Oficyna Wydawnicza

Tematy:

optymalizacja nieliniowa
sterowanie optymalizujące
nonlinear optimization
optimizing control
duality
condition number

Opis:

First results concerning important theoretical properties of the dual ISOPE (Integrated System Optimization and Parameter Estimation) algorithm are presented. The algorithm applies to on-line set-point optimization in control structures with uncertainty in process models and disturbance estimates, as well as to difficult nonlinear constrained optimization problems. Properties of the conditioned (dualized) set of problem constraints are investigated, showing its structure and feasibility properties important for applications. Convergence conditions for a simplified version of the algorithm are derived, indicating a practically important threshold value of the right-hand side of the conditioning constraint. Results of simulations are given confirming the theoretical results and illustrating properties of the algorithms.

Źródło:

International Journal of Applied Mathematics and Computer Science; 2001, 11, 2; 429-457
1641-876X
2083-8492

Pojawia się w:

International Journal of Applied Mathematics and Computer Science

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 34.

Tytuł:

Anti-synchronization in different new chaotic systems via active nonlinear control

Autorzy:

Khan, A.
Prasad, R. P.

Powiązania:

https://bibliotekanauki.pl/articles/229711.pdf

Data publikacji:

2013

Wydawca:

Polska Akademia Nauk. Czytelnia Czasopism PAN

Tematy:

new chaotic system
anti-synchronization
active nonlinear control

Opis:

In this paper, we discuss anti-synchronization between two identical new chaotic systems and anti-synchronization between another two identical new chaotic systems by active nonlinear control. The sufficient conditions for achieving the anti-synchronization of two new chaotic systems are derived based on Lyapunov stability theory. Numerical simulations are provided for illustration and verification of the proposed method.

Źródło:

Archives of Control Sciences; 2013, 23, 2; 229-242
1230-2384

Pojawia się w:

Archives of Control Sciences

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 35.

Tytuł:

Application of poli-criterial linearization for control problem of stochastic dynamic systems
Zastosowanie wielokryterialnej linearyzacji w problemie sterowania stochastycznych nieliniowych układów dynamicznych

Autorzy:

Socha, L.

Powiązania:

https://bibliotekanauki.pl/articles/279864.pdf

Data publikacji:

2005

Wydawca:

Polskie Towarzystwo Mechaniki Teoretycznej i Stosowanej

Tematy:

Stochastic control of nonlinear systems
LQG control problem
stochastic linearization
Pareto optimal solution

Opis:

The problem of the determination of response characteristics and quasi-optimal control for nonlinear stochastic dynamic systems by using a multi-criteria linearization technique is presented in this paper. This idea was first introduced in previous author's paper (Socha, 1999a) for a simple dynamic system. In this paper, it is extended, and detailed analysis is given for a nonlinear oscillator with Gaussian external excitations and for a few criteria of statistical linearization. The obtained results are illustrated by a numerical example for Duffing's oscillator.
W pracy przedstawiono problem wyznaczania quasi-optymalnego sterowania w nieliniowych stochastycznych układach dynamicznych za pomocą wielokryterialnej metody linearyzacji stochastycznej. Pomysł wielokryterialnej linearyzacji został zasygnalizowany we wcześniejszej pracy autora (Socha, 1999a). W niniejszym artykule jest on rozwinięty i zastosowany do problemu sterowania, a szczegółowa analiza jest przeprowadzona dla nieliniowego oscylatora z addytywnym wymuszeniem Gaussa.

Źródło:

Journal of Theoretical and Applied Mechanics; 2005, 43, 3; 675-693
1429-2955

Pojawia się w:

Journal of Theoretical and Applied Mechanics

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 36.

Tytuł:

Application of the classical implicit function theorem in sensitivity analysis of parametric optimal control

Autorzy:

Malanowski, K.

Powiązania:

https://bibliotekanauki.pl/articles/206654.pdf

Data publikacji:

1998

Wydawca:

Polska Akademia Nauk. Instytut Badań Systemowych PAN

Tematy:

równania różniczkowe nieliniowe
różniczkowalność rozwiązań
sterowanie optymalne parametryczne
differentiability of solutions
implicit function theorem
nonlinear ordinary differential equations
parametric optimal control
state constraints

Opis:

A family {(O[sub h])} of parametric optimal control problems for nonlinear ODEs is considered. The problems are subject to pointwise inequality type state constraints. It is assumed that the reference solution is regular. The original problems (O[sub h]) are substituted by problems [...] subject to equality type constraints with the sets of activity depending on the parameter. Using the classical implicit function theorem, conditions are derived under which stationary points of [...] are Frechet differentiable functions of the parameter. It is shown that, under additional conditions, the stationary points of [...] correspond to the solutions and Lagrange multipliers of (O[sub h]9).

Źródło:

Control and Cybernetics; 1998, 27, 3; 335-352
0324-8569

Pojawia się w:

Control and Cybernetics

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 37.

Tytuł:

Approximation of optimal control problems with bound constraints by control parameterization

Autorzy:

Alt, W.

Powiązania:

https://bibliotekanauki.pl/articles/970516.pdf

Data publikacji:

2003

Wydawca:

Polska Akademia Nauk. Instytut Badań Systemowych PAN

Tematy:

sterowanie optymalne nieliniowe
metoda Newtona
nonlinear optimal control
bound constraints
Newton's method
control parameterization

Opis:

We consider nonlinear optimal control problems with bound constraints for the controls. Under the assumption that the optimal control is continuous and has finitely many smooth boundary arcs, we show that the system of optimahty conditions can be reduced to a system of operator equations. Based on this system we investigate convergence of approximations by control parameterization.

Źródło:

Control and Cybernetics; 2003, 32, 3; 451-472
0324-8569

Pojawia się w:

Control and Cybernetics

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 38.

Tytuł:

Automatic Control of Mechatronic Systems

Autorzy:

Schlacher, K.
Kugi, A.

Powiązania:

https://bibliotekanauki.pl/articles/908321.pdf

Data publikacji:

2001

Wydawca:

Uniwersytet Zielonogórski. Oficyna Wydawnicza

Tematy:

mechatronika
geometria różniczkowa
sterowanie
mechatronic systems
differential geometry
nonlinear H_{infty}-control
passivity
input-output linearization

Opis:

This contribution deals with different concepts of nonlinear control for mechatronic systems. Since most physical systems are nonlinear in nature, it is quite obvious that an improvement in the performance of the closed loop can often be achieved only by means of control techniques that take the essential nonlinearities into consideration. Nevertheless, it can be observed that industry often hesitates to implement these nonlinear controllers, despite all advantages existing from the theoretical point of view. On the basis of three different applications, a PWM-controlled dc-to-dc converter, namely the Cuk-converter, the problem of hydraulic gap control in steel rolling, and the design of smart structures with piezolelectric sensor and actuator layers, we will demonstrate how one can overcome these problems by exploiting the physical structure of the mathematical models of the considered plants.

Źródło:

International Journal of Applied Mathematics and Computer Science; 2001, 11, 1; 131-164
1641-876X
2083-8492

Pojawia się w:

International Journal of Applied Mathematics and Computer Science

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 39.

Tytuł:

Badanie i porównanie algorytmów LQR i backstepping do sterowania wahadła odwróconego z napędem inercyjnym
Comparison of LQR control and nonlinear backstepping control using an inertia wheel pendulum

Autorzy:

Owczarkowski, A.
Gośliński, J.
Owczarek, P.
Rybarczyk, D.

Powiązania:

https://bibliotekanauki.pl/articles/153666.pdf

Data publikacji:

2013

Wydawca:

Stowarzyszenie Inżynierów i Techników Mechaników Polskich

Tematy:

sterowanie nieliniowe
backstepping
LQR
filtr Kalmana
nonlinear control
Kalman filter

Opis:

W artykule przedstawiono rezultaty działania sterowania liniowo-kwadratowego LQR (ang. Linear Quadratic Regulator) i nieliniowego backstepping na realnym obiekcie. Obiektem sterowania jest wahadło odwrócone z napędem inercyjnym (IWP - ang. Inertia Wheel Pendulum). Posiada ono dwa stopnie swobody: kąt odchylenia od pionu oraz kąt obrotu koła zamachowego. Wirującą masę napędza wysokomomentowy silnik umieszczony wewnątrz konstrukcji. Obiekt posiada mniej wymuszeń (jedno) niż stopni swobody (dwa) i dlatego nazywany jest underactuated. Celem układu regulacji jest utrzymywanie urządzenia w pozycji pionowej stanowiącej punkt równowagi. Zastosowano sterowanie nieliniowe backstepping. Kąt obrotu koła zamachowego mierzony jest przez enkoder inkrementalny. Do pomiaru poziomu odchylenia od pionu zastosowano jednostkę IMU (ang. Inertial Measurement Unit) zawierającą akcelerometr i żyroskop. Chcąc stworzyć efektywnie działającą fuzję sensoryczną, zastosowano filtrację Kalmana. Dzięki temu możliwe jest ustalenie odpowiedniego stopnia zaufania odpowiednim potokom pomiarowym i odfiltrowanie szkodliwych zakłóceń. Wykonano testy na obiekcie rzeczywistym i udowodniono poprawność działania zastosowanych algorytmów.
This paper presents the results and comparison of linear quadratic control LQR and nonlinear backstepping on a real device. This device is the inverted pendulum driven by an accelerating inertia – inertia wheel pendulum. It has two degrees of freedom: the angle of inclination and the angle of rotation of the flywheel and one actuator – a high torque DC electric engine. Thus it is called underactuated. The purpose of the control system is to maintain the device in a vertical position which is the unstable equilibrium point. The angle of rotation of the flywheel is measured by an incremental encoder. To measure the angle from the vertical position, there was used the IMU (Inertial Measurement Unit) containing an accelerometer and a gyroscope. In order to create an effectively functioning sensory fusion, Kalman filtering was used. This made it possible to determine the appropriate level of trust for sensors and to filter out harmful noise. The correct effect of the used algorithms is presented.

Źródło:

Pomiary Automatyka Kontrola; 2013, R. 59, nr 10, 10; 1016-1019
0032-4140

Pojawia się w:

Pomiary Automatyka Kontrola

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 40.

Tytuł:

Chaos synchronization of uncertain coronary artery systems through sliding mode

Autorzy:

Qian, D. W.
Xi, Y. F.
Tong, S. W.

Powiązania:

https://bibliotekanauki.pl/articles/201501.pdf

Data publikacji:

2019

Wydawca:

Polska Akademia Nauk. Czytelnia Czasopism PAN

Tematy:

chaos synchronization
coronary artery systems
sliding mode control
nonlinear dynamics
synchronizacja chaosu
system tętnic wieńcowych
kontroler trybu przesuwnego
dynamika nieliniowa

Opis:

The chaotic phenomena of coronary artery systems are hazardous to health and may induce illness development. From the perspective of engineering, the potential harm can be eliminated by synchronizing chaotic coronary artery systems with a normal one. This paper investigates the chaos synchronization problem in light of the methodology of sliding mode control (SMC). Firstly, the nonlinear dynamics of coronary artery systems are presented. Since the coronary artery systems suffer from uncertainties, the technique of derivative-integral terminal SMC is employed to achieve the chaos synchronization task. The stability of such a control system is proven in the sense of Lyapunov. To verify the feasibility and effectiveness of the proposed method, some simulation results are illustrated in comparison with a benchmark.

Źródło:

Bulletin of the Polish Academy of Sciences. Technical Sciences; 2019, 67, 3; 455-462
0239-7528

Pojawia się w:

Bulletin of the Polish Academy of Sciences. Technical Sciences

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 41.

Tytuł:

Chattering attenuation in sliding mode control systems

Autorzy:

Bartoszewicz, A.

Powiązania:

https://bibliotekanauki.pl/articles/206731.pdf

Data publikacji:

2000

Wydawca:

Polska Akademia Nauk. Instytut Badań Systemowych PAN

Tematy:

nieliniowy system sterowania
nonlinear control system
compensation
control nonlinearities
sliding mode control
variable structure systems

Opis:

In this paper sliding mode control systems are considered and a new technique to attenuate chattering is proposed. The technique employs simple, first-order dynamical devices, i.e. an integrator or a low-pass filter, to compensate in part for unknown and changing disturbance. As a result of this compensation, the magnitude of the discontinuous control term is essentially reduced. The term does not depend on the admissible disturbance or its change rate, but only on the uncertainty of the disturbance at the initial time t = t[sub o]. The technique proposed in this paper attenuates the undesirable chattering without any deterioration of the system performance.

Źródło:

Control and Cybernetics; 2000, 29, 2; 585-584
0324-8569

Pojawia się w:

Control and Cybernetics

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 42.

Tytuł:

Comparative Study of AMPL, Pyomo and JuMP Optimization Modeling Languages on a Flood Control Problem Example
Studium porównawcze języków modelowania optymalizacyjnego AMPL, Pyomo i JuMP na przykładzie zadania sterowania falą powodziową

Autorzy:

Karbowski, Andrzej
Wyskiel, Krzysztof

Powiązania:

https://bibliotekanauki.pl/articles/2068672.pdf

Data publikacji:

2021

Wydawca:

Sieć Badawcza Łukasiewicz - Przemysłowy Instytut Automatyki i Pomiarów

Tematy:

optimization
modeling languages
programming
flood control problem
nonlinear programming
optimal control
optymalizacja
języki modelowania
programowanie
sterowanie falą powodziową
programowanie nieliniowe
sterowanie optymalne

Opis:

The purpose of this work is a comparative study of three languages (environments) of optimization modeling: AMPL, Pyomo and JuMP. The comparison will be based on three implementations of an optimal discrete-time flood control problem formulated as a nonlinear programming problem. The codes for individual models and differences between them will be presented and discussed. Various aspects will be taken into account, e.g. simplicity and intuitiveness of implementation.
Celem pracy jest badanie porównawcze trzech języków (środowisk) modelowania optymalizacyjnego: AMPL, Pyomo i JuMP. Porównanie jest oparte na trzech implementacjach zadania optymalnego sterowania falą powodziową z czasem dyskretnym, sformułowanego jako zadanie programowania nieliniowego. Przedstawione i omówione zostaną kody poszczególnych modeli oraz różnice między nimi. Uwzględnione zostaną różne aspekty, m.in. prostota i intuicyjność implementacji.

Źródło:

Pomiary Automatyka Robotyka; 2021, 25, 4; 19--24
1427-9126

Pojawia się w:

Pomiary Automatyka Robotyka

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 43.

Tytuł:

Comparison of Two Nonlinear Predictive Control Algorithms for Dissolved Oxygen Tracking Problem at WWTP

Autorzy:

Piotrowski, R.

Powiązania:

https://bibliotekanauki.pl/articles/384859.pdf

Data publikacji:

2016

Wydawca:

Sieć Badawcza Łukasiewicz - Przemysłowy Instytut Automatyki i Pomiarów

Tematy:

aeration
dissolved oxygen
wastewater treatment
mathematical modelling
nonlinear system
predictive control

Opis:

The wastewater treatment plant is classified as a complex system due to its nonlinear dynamics, large uncertainty in the disturbance inputs, multiple time scales in the internal process dynamics and multivariable structure. Aeration is an important and expensive activity that is carried out during wastewater treatment plant operation. A precise aeration control in biological processes for all the operating conditions is necessary in order to guarantee adequate biological conditions for microorganisms. Therefore, the most important is to operate the biological processes so that a minimal energy was consumed and minimal DO concentration demand was applied. The paper proposes a two advanced control systems to track the dissolved oxygen reference trajectory. A decentralized and multivariable nonlinear predictive control algorithms are designed and compared. Simulation tests for the case study wastewater treatment plant are presented.

Źródło:

Journal of Automation Mobile Robotics and Intelligent Systems; 2016, 10, 1; 8-16
1897-8649
2080-2145

Pojawia się w:

Journal of Automation Mobile Robotics and Intelligent Systems

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 44.

Tytuł:

Computationally efficient nonlinear model predictive controller using parallel particle swarm optimization

Autorzy:

Diwan, Supriya P.
Deshpande, Shraddha S.

Powiązania:

https://bibliotekanauki.pl/articles/2173694.pdf

Data publikacji:

2022

Wydawca:

Polska Akademia Nauk. Czytelnia Czasopism PAN

Tematy:

nonlinear model predictive control
particle swarm optimization
PSO
fast dynamic systems
rotary inverted pendulum
divide approach
conquer approach
kontrola predykcyjna modelu nieliniowa
optymalizacja roju cząstek
system dynamiczny szybki
wahadło obrotowe odwrócone

Opis:

As nonlinear optimization techniques are computationally expensive, their usage in the real-time era is constrained. So this is the main challenge for researchers to develop a fast algorithm that is used in real-time computations. This work proposes a fast nonlinear model predictive control approach based on particle swarm optimization for nonlinear optimization with constraints. The suggested algorithm divide and conquer technique improves computing speed and disturbance rejection capability, demonstrating its suitability for real-time applications. The performance of this approach under constraints is validated using a highly nonlinear fast and dynamic real-time inverted pendulum system. The solution presented through work is computationally feasible for smaller sampling times and it gives promising results compared to the state of art PSO algorithm

Źródło:

Bulletin of the Polish Academy of Sciences. Technical Sciences; 2022, 70, 4; art. no. e140696
0239-7528

Pojawia się w:

Bulletin of the Polish Academy of Sciences. Technical Sciences

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 45.

Tytuł:

Control of complex dynamic nonlinear loading process for electromagnetic mill

Autorzy:

Ogonowski, Szymon
Bismor, Dariusz
Ogonowski, Zbigniew

Powiązania:

https://bibliotekanauki.pl/articles/229680.pdf

Data publikacji:

2020

Wydawca:

Polska Akademia Nauk. Czytelnia Czasopism PAN

Tematy:

predictive control
pole placement
nonlinear dynamics
neural modelling
electromagnetic mill

Opis:

Electromagnetic mill installation for dry grinding represents a complex dynamical system that requires specially designed control system. The paper presents model-based predictive control which locates closed loop poles in arbitrary places. The controller performs as gains cheduling prototype where nonlinear model – artificial recurrent neural network, is parameterized with additional measurements and serves as a basis for local linear approximation. Application of such a concept to control electromagnetic mill load allows for stable performance of the installation and assures fulfilment of the product quality as well as the optimization of the energy consumption.

Źródło:

Archives of Control Sciences; 2020, 30, 3; 471-500
1230-2384

Pojawia się w:

Archives of Control Sciences

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 46.

Tytuł:

Control of Fractional-Order Nonlinear Systems: A Review

Autorzy:

Petráš, I.
Bednárová, D.

Powiązania:

https://bibliotekanauki.pl/articles/386576.pdf

Data publikacji:

2011

Wydawca:

Politechnika Białostocka. Oficyna Wydawnicza Politechniki Białostockiej

Tematy:

sterowanie
systemy nielioniowe
przegląd
control
nonlinear systems
review

Opis:

This paper deals with the control of the fractional-order nonlinear systems. A list of the control strategies as well as synchronization of the chaotic systems is presented. An illustrative example of sliding mode control (SMC) of the fractional-order (commensurate and incommensurate) financial system is described and commented together with the simulation results.

Źródło:

Acta Mechanica et Automatica; 2011, 5, 2; 96-100
1898-4088
2300-5319

Pojawia się w:

Acta Mechanica et Automatica

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 47.

Tytuł:

Convergence of the Lagrange-Newton Method for Optimal Control Problems

Autorzy:

Malanowski, K. D.

Powiązania:

https://bibliotekanauki.pl/articles/907971.pdf

Data publikacji:

2004

Wydawca:

Uniwersytet Zielonogórski. Oficyna Wydawnicza

Tematy:

sterowanie optymalne
ograniczenia mieszane
metoda Lagrange'a-Newtona
optimal control
nonlinear ODEs
mixed constraints
Lagrange-Newton method

Opis:

Convergence results for two Lagrange-Newton-type methods of solving optimal control problems are presented. It is shown how the methods can be applied to a class of optimal control problems for nonlinear ODEs, subject to mixed control-state constraints. The first method reduces to an SQP algorithm. It does not require any information on the structure of the optimal solution. The other one is the shooting method, where information on the structure of the optimal solution is exploited. In each case, conditions for well-posedness and local quadratic convergence are given. The scope of applicability is briefly discussed.

Źródło:

International Journal of Applied Mathematics and Computer Science; 2004, 14, 4; 531-540
1641-876X
2083-8492

Pojawia się w:

International Journal of Applied Mathematics and Computer Science

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 48.

Tytuł:

Cooperation of model predictive control with steady-state economic optimisation

Autorzy:

Ławryńczuk, M.
Marusak, P. M.
Tatjewski, P.

Powiązania:

https://bibliotekanauki.pl/articles/971007.pdf

Data publikacji:

2008

Wydawca:

Polska Akademia Nauk. Instytut Badań Systemowych PAN

Tematy:

sterowanie optymalne
optymalizacja
predictive control
optimal control
optimisation
economic steady-state optimisation
nonlinear control systems
constrained control

Opis:

The problem of cooperation of Model Predictive Control (MPC) algorithms with steady-state economic optimisation is investigated in this paper. It is particularly important when the dynamics of disturbances is comparable with the dynamics of the process, since in such a case the classical hierarchical multilayer structure is likely to be not efficient and give the economic yield smaller than expected. This is because the economic nonlinear optimisation problem cannot be then solved on-line to update the optimal operating point as frequently as needed. On the other hand, simple target set-point optimisation based on linear models can be also insufficiently accurate. This paper introduces approximate formulations of the target set-point optimisation problem which tightly cooperates with the MPC and is solved as frequently as the MPC controller executes. Linear, linear-quadratic and piecewise-linear formulations are discussed, tuning guidelines are also given.

Źródło:

Control and Cybernetics; 2008, 37, 1; 133-158
0324-8569

Pojawia się w:

Control and Cybernetics

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 49.

Tytuł:

Data probes, vertical trajectories and classification: A tentative study

Autorzy:

Pearson, D. W.

Powiązania:

https://bibliotekanauki.pl/articles/911252.pdf

Data publikacji:

2007

Wydawca:

Uniwersytet Zielonogórski. Oficyna Wydawnicza

Tematy:

klasyfikacja
zerowanie wyjścia
sterowanie nieliniowe
geometria różniczkowa
classification
output zeroing
nonlinear control
differential geometry

Opis:

In this paper we introduce a method of classification based on data probes. Data points are considered as point masses in space and a probe is simply a particle that is launched into the space. As the probe passes by data clusters, its trajectory will be influenced by the point masses. We use this information to help us to find vertical trajectories. These are trajectories in the input space that are mapped onto the same value in the output space and correspond to the data classes.

Źródło:

International Journal of Applied Mathematics and Computer Science; 2007, 17, 1; 107-112
1641-876X
2083-8492

Pojawia się w:

International Journal of Applied Mathematics and Computer Science

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 50.

Tytuł:

Design and experimentation of a self-tuning PID control applied to the 3DOF helicopter

Autorzy:

Boubakir, A
Labiod, S.
Boudjema, F.
Plestan, F

Powiązania:

https://bibliotekanauki.pl/articles/229575.pdf

Data publikacji:

2013

Wydawca:

Polska Akademia Nauk. Czytelnia Czasopism PAN

Tematy:

3-DOF helicopter
PID control
adaptive control
MIMO nonlinear systems
model-free control

Opis:

The paper presents design and experimental validation of a stable self-tuning PID controller for three degrees of freedom (3-DOF) helicopter. At first, it is proposed a self-tuned proportional-integral-derivative (PID) controller for a class of uncertain second order multiinput multi-output nonlinear dynamic systems to which the 3-DOF helicopter dynamic model belongs. Within this scheme, the PID controller is employed to approximate unknown ideal controller that can achieve control objectives. PID controller gains are the adjustable parameters and they are updated online with a stable adaptation mechanism designed to minimize the error between the unknown ideal controller and the used by PID controller. The stability analysis of the closed-loop system is performed using Lyapunov approach. It is proven that all signals in the closed-loop system are uniformly ultimately bounded. The proposed approach can be regarded as a simple and effective model-free control since the mathematical model of the system is assumed unknown. Experimental results are presented to verify the effectiveness of the proposed controller.

Źródło:

Archives of Control Sciences; 2013, 23, 3; 311-331
1230-2384

Pojawia się w:

Archives of Control Sciences

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 51.

Tytuł:

Design and Stability of Fuzzy Logic Multi-Regional Output Controllers

Autorzy:

Domański, P.
Brdyś, M. A.
Tatjewski, P.

Powiązania:

https://bibliotekanauki.pl/articles/908274.pdf

Data publikacji:

1999

Wydawca:

Uniwersytet Zielonogórski. Oficyna Wydawnicza

Tematy:

sterowanie nieliniowe
sterowanie wewnętrzne
zbiór rozmyty
model Takagi-Sugeno
nonlinear output control
fuzzy logic
Takagi-Sugeno models
stability conditions

Opis:

Design and stability analysis of fuzzy multi-regional digital controllers is considered in the paper. The controllers are based on a notion of NARMAX systems, very similar to the Takagi-Sugeno fuzzy model. The nonlinear system is approximated by a number of linear subsystems. Linear controllers are designed for all subsystems. It can be made in a classical way due to the subsystems linearity. The controllers are blended into one controller by employing fuzzy logic, the result being the fuzzy multi-regional controller (FuMR). The stability analysis of nonlinear systems with FuMR controllers composed of dynamic output feedback local linear controllers is provided. Examples illustrate the design procedure and the meaning of the stability criterion.

Źródło:

International Journal of Applied Mathematics and Computer Science; 1999, 9, 4; 883-897
1641-876X
2083-8492

Pojawia się w:

International Journal of Applied Mathematics and Computer Science

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 52.

Tytuł:

Design of a multivariable neural controller for control of a nonlinear MIMO plant

Autorzy:

Bańka, S.
Dworak, P.
Jaroszewski, K.

Powiązania:

https://bibliotekanauki.pl/articles/330790.pdf

Data publikacji:

2014

Wydawca:

Uniwersytet Zielonogórski. Oficyna Wydawnicza

Tematy:

MIMO multivariable control system
nonlinear system
neural control
wielowymiarowy układ sterowania
układ nieliniowy
sterowanie neuronowe

Opis:

The paper presents the training problem of a set of neural nets to obtain a (gain-scheduling, adaptive) multivariable neural controller for control of a nonlinear MIMO dynamic process represented by a mathematical model of Low-Frequency (LF) motions of a drillship over the drilling point at the sea bottom. The designed neural controller contains a set of neural nets that determine values of its parameters chosen on the basis of two measured auxiliary signals. These are the ship’s current forward speed measured with respect to water and the systematically calculated difference between the course angle and the sea current (yaw angle). Four different methods for synthesis of multivariable modal controllers are used to obtain source data for training the neural controller with parameters reproduced by neural networks. Neural networks are designed on the basis of 3650 modal controllers obtained with the use of the pole placement technique after having linearized the model of LF motions made by the vessel at its nominal operating points in steady states that are dependent on the specified yaw angle and the sea current velocity. The final part of the paper includes simulation results of system operation with a neural controller along with conclusions and final remarks.

Źródło:

International Journal of Applied Mathematics and Computer Science; 2014, 24, 2; 357-369
1641-876X
2083-8492

Pojawia się w:

International Journal of Applied Mathematics and Computer Science

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 53.

Tytuł:

Designing a ship course controller by applying the adaptive backstepping method

Autorzy:

Witkowska, A.
Śmierzchalski, R.

Powiązania:

https://bibliotekanauki.pl/articles/331255.pdf

Data publikacji:

2012

Wydawca:

Uniwersytet Zielonogórski. Oficyna Wydawnicza

Tematy:

autopilot
sterowanie adaptacyjne
sterowanie nieliniowe
algorytm genetyczny
adaptive control
nonlinear control
backstepping
genetic algorithms

Opis:

The article discusses the problem of designing a proper and efficient adaptive course-keeping control system for a seagoing ship based on the adaptive backstepping method. The proposed controller in the design stage takes into account the dynamic properties of the steering gear and the full nonlinear static maneuvering characteristic. The adjustable parameters of the achieved nonlinear control structure were tuned up by using the genetic algorithm in order to optimize the system performance. A realistic full-scale simulation model of the B-481 type vessel including wave and wind effects was applied to simulate the control algorithm by using time domain analysis.

Źródło:

International Journal of Applied Mathematics and Computer Science; 2012, 22, 4; 985-997
1641-876X
2083-8492

Pojawia się w:

International Journal of Applied Mathematics and Computer Science

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 54.

Tytuł:

Discrete approximation of nonconvex hyperbolic optimal control problems with state constraints

Autorzy:

Chryssoverghi, I.
Bacopoulos, A.
Coletsos, J.
Kokkinis, B.

Powiązania:

https://bibliotekanauki.pl/articles/205975.pdf

Data publikacji:

1998

Wydawca:

Polska Akademia Nauk. Instytut Badań Systemowych PAN

Tematy:

dyskretyzacja
nieliniowy układ hiperboliczny
sterowanie optymalne
zasada minimum
discretization
existence theory
minimum principle
nonlinear hyperbolic systems
optimal control
relaxed controls

Opis:

We consider an opitmal control problem for systems defined by nonlinear hyperbolic partial differential equations with state constraints. Since no convexity assumptions are made on the data, we also consider the control problem in relaxed form. We discretize both the classical and the relaxed problenms by using a finite element method in space and a finite difference scheme in time, the controls being approximated by piecevise constant ones. We develop the existence theory and the necessary conditions for optimality, for the continous and the discrete problems. Finally, we study the behaviour in the limit of discrete optimality, admissibility and extremality properties.

Źródło:

Control and Cybernetics; 1998, 27, 1; 29-50
0324-8569

Pojawia się w:

Control and Cybernetics

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 55.

Tytuł:

Dynamic Contraction Method approach to digital longitudinal aircraft flight controller design

Autorzy:

Czyba, Roman
Stajer, Lukasz

Powiązania:

https://bibliotekanauki.pl/articles/229293.pdf

Data publikacji:

2019

Wydawca:

Polska Akademia Nauk. Czytelnia Czasopism PAN

Tematy:

nonlinear systems
MIMO systems
aircraft control
digital controller
singular perturbation

Opis:

This paper presents the design of digital controller for longitudinal aircraft model basedon the Dynamic Contraction Method. The control task is formulated as a tracking problem of velocity and flight path angle, where decoupled output transients are accomplished in spite of incomplete information about varying parameters of the system and external disturbances. The design of digital controller based on the pseudo-continuous approach is presented, where the digital controller is the result of continuous-time controller discretization. A resulting output feedback controller has a simple form of a combination of low-order linear dynamical systems and a matrix whose entries depend nonlinearly on certain known process variables. Simulation results for an aircraft model confirm theoretical expectations.

Źródło:

Archives of Control Sciences; 2019, 29, 1; 97-109
1230-2384

Pojawia się w:

Archives of Control Sciences

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 56.

Tytuł:

Effective dual-mode fuzzy DMC algorithms with on-line quadratic optimization and guaranteed stability

Autorzy:

Marusak, P. M.
Tatjewski, P.

Powiązania:

https://bibliotekanauki.pl/articles/907866.pdf

Data publikacji:

2009

Wydawca:

Uniwersytet Zielonogórski. Oficyna Wydawnicza

Tematy:

system nieliniowy
system rozmyty
sterowanie predykcyjne
stabilność
sterowność wymuszona
nonlinear system
fuzzy system
model predictive control
stability
constrained control
dual-mode control

Opis:

Dual-mode fuzzy dynamic matrix control (fuzzy DMC-FDMC) algorithms with guaranteed nominal stability for constrained nonlinear plants are presented. The algorithms join the advantages of fuzzy Takagi-Sugeno modeling and the predictive dual-mode approach in a computationally efficient version. Thus, they can bring an improvement in control quality compared with predictive controllers based on linear models and, at the same time, control performance similar to that obtained using more demanding algorithms with nonlinear optimization. Numerical effectiveness is obtained by using a successive linearization approach resulting in a quadratic programming problem solved on-line at each sampling instant. It is a computationally robust and fast optimization problem, which is important for on-line applications. Stability is achieved by appropriate introduction of dual-mode type stabilization mechanisms, which are simple and easy to implement. The effectiveness of the proposed approach is tested on a control system of a nonlinear plant-a distillation column with basic feedback controllers.

Źródło:

International Journal of Applied Mathematics and Computer Science; 2009, 19, 1; 127-141
1641-876X
2083-8492

Pojawia się w:

International Journal of Applied Mathematics and Computer Science

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 57.

Tytuł:

Efficient MPC algorithms with variable trajectories of parameters weighting predicted control errors

Autorzy:

Nebeluk, Robert
Marusak, Piotr

Powiązania:

https://bibliotekanauki.pl/articles/230077.pdf

Data publikacji:

2020

Wydawca:

Polska Akademia Nauk. Czytelnia Czasopism PAN

Tematy:

model predictive control
nonlinear systems
nonlinear models
nonlinear control
simulation
optimization

Opis:

Model predictive control (MPC) algorithms brought increase of the control system performance in many applications thanks to relatively easily solving issues that are hard to solve without these algorithms. The paper is focused on investigating how to further improve the control system performance using a trajectory of parameters weighting predicted control errors in the performance function of the optimization problem. Different shapes of trajectories are proposed and their influence on control systems is tested. Additionally, experiments checking the influence of disturbances and of modeling uncertainty on control system performance are conducted. The case studies were done in control systems of three control plants: a linear non-minimumphase plant, a nonlinear polymerization reactor and a nonlinear thin film evaporator. Three types of MPC algorithms were used during research: linear DMC, nonlinear DMC with successive linearization (NDMC–SL), nonlinear DMC with nonlinear prediction and linearization (NDMC–NPL). Results of conducted experiments are presented in greater detail for the control system of the polymerization reactor, whereas for the other two control systems only the most interesting results are presented, for the sake of brevity. The experiments in the control system of the linear plant were done as preliminary experiments with the modified optimization problem. In the case of control system of the thin film evaporator the researched mechanisms were used in the control system of a MIMO plant showing possibilities of improving the control system performance.

Źródło:

Archives of Control Sciences; 2020, 30, 2; 325-363
1230-2384

Pojawia się w:

Archives of Control Sciences

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 58.

Tytuł:

Expert system approach in designing knowladge-based controller

Autorzy:

Ptasznik, P.

Powiązania:

https://bibliotekanauki.pl/articles/1813975.pdf

Data publikacji:

2013

Wydawca:

Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej

Tematy:

nonlinear control
expert systems
reasoning
Al

Opis:

In this article the knowledge-based control approach will be proposed for nonlinear systems. Firstly some basic concepts from the artificial intelligence will be defined, then the expert system design process will be introduced and finally a practical example will be discussed. The principle of this method is to support the controller with the human-like reasoning to determine the appropriate control mode and to estimate unknown parameters. Note that this is the heuristic approach, hence neither optimal steering, nor stability is guaranteed.

Źródło:

Prace Naukowe Instytutu Maszyn, Napędów i Pomiarów Elektrycznych Politechniki Wrocławskiej. Studia i Materiały; 2013, 69, 33; 540--549
1733-0718

Pojawia się w:

Prace Naukowe Instytutu Maszyn, Napędów i Pomiarów Elektrycznych Politechniki Wrocławskiej. Studia i Materiały

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 59.

Tytuł:

Fast optimal feedback controller for electric linear actuator used in spreading systems of road spreaders

Autorzy:

Dobrowolski, D.
Dobrowolski, J.
Piekarska, W.
Stępień, S.

Powiązania:

https://bibliotekanauki.pl/articles/201515.pdf

Data publikacji:

2019

Wydawca:

Polska Akademia Nauk. Czytelnia Czasopism PAN

Tematy:

linear electric actuator
nonlinear modelling
optimal feedback control

Opis:

Modern and innovative road spreaders are now equipped with a special swiveling mechanism of the spreading disc. It allows for adjusting asymmetrical or a symmetrical spreading pattern and provides for the possibility to maintain the size of the spreading surface and achieve an accurately defined spreading pattern with spreading widths. Thus the paper presents a modelling and control design methodology, and the concept is proposed to design high-performance and optimal drive systems for spreading devices. The paper deals with a nonlinear model of an electric linear actuator and solution of the new intelligent/optimal control problem for the actuator.

Źródło:

Bulletin of the Polish Academy of Sciences. Technical Sciences; 2019, 67, 6; 1041-1047
0239-7528

Pojawia się w:

Bulletin of the Polish Academy of Sciences. Technical Sciences

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 60.

Tytuł:

Fault tolerant control of switched nonlinear systems with time delay under asynchronous switching

Autorzy:

Xiang, Z.
Wang, R.
Chen, Q.

Powiązania:

https://bibliotekanauki.pl/articles/929592.pdf

Data publikacji:

2010

Wydawca:

Uniwersytet Zielonogórski. Oficyna Wydawnicza

Tematy:

opóźnienie czasowe
sterowanie tolerujące uszkodzenia
układ komutowany
układ nieliniowy
time delay
fault tolerant control
switched nonlinear systems
asynchronous switching

Opis:

This paper investigates the problem of fault tolerant control of a class of uncertain switched nonlinear systems with time delay under asynchronous switching. The systems under consideration suffer from delayed switchings of the controller. First, a fault tolerant controller is proposed to guarantee exponentially stability of the switched systems with time delay. The dwell time approach is utilized for stability analysis and controller design. Then the proposed approach is extended to take into account switched time delay systems with Lipschitz nonlinearities and structured uncertainties. Finally, a numerical example is given to illustrate the effectiveness of the proposed method.

Źródło:

International Journal of Applied Mathematics and Computer Science; 2010, 20, 3; 497-506
1641-876X
2083-8492

Pojawia się w:

International Journal of Applied Mathematics and Computer Science

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 61.

Tytuł:

Fault-tolerant tracking control for a non-linear twin-rotor system under ellipsoidal bounding

Autorzy:

Kukurowski, Norbert
Mrugalski, Marcin
Pazera, Marcin
Witczak, Marcin

Powiązania:

https://bibliotekanauki.pl/articles/2124781.pdf

Data publikacji:

2022

Wydawca:

Uniwersytet Zielonogórski. Oficyna Wydawnicza

Tematy:

fault tolerant control
simultaneous fault
external disturbances
nonlinear system
robust fault estimation
fault detection
fault diagnosis
sterowanie tolerujące uszkodzenia
uszkodzenie równoczesne
zakłócenia zewnętrzne
układ nieliniowy
szacowanie błędu
wykrywanie uszkodzenia
diagnoza uszkodzenia

Opis:

A novel fault-tolerant tracking control scheme based on an adaptive robust observer for non-linear systems is proposed. Additionally, it is presumed that the non-linear system may be faulty, i.e., affected by actuator and sensor faults along with the disturbances, simultaneously. Accordingly, the stability of the robust observer as well as the fault-tolerant tracking controller is achieved by using the ℋ∞ approach. Furthermore, unknown actuator and sensor faults and states are bounded by the uncertainty intervals for estimation quality assessment as well as reliable fault diagnosis. This means that narrow intervals accompany better estimation quality. Thus, to cope with the above difficulty, it is assumed that the disturbances are over-bounded by an ellipsoid. Consequently, the performance and correctness of the proposed fault-tolerant tracking control scheme are verified by using a non-linear twin-rotor aerodynamical laboratory system.

Źródło:

International Journal of Applied Mathematics and Computer Science; 2022, 32, 2; 171--183
1641-876X
2083-8492

Pojawia się w:

International Journal of Applied Mathematics and Computer Science

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 62.

Tytuł:

Feed-forward compensation for nonlinearity of vibrating plate as the sound source for active noise control
Kompensacja nieliniowości płyty drgającej jako źródła dźwięku dla systemów aktywnej redukcji hałasu

Autorzy:

Mazur, K.
Pawełczyk, M.

Powiązania:

https://bibliotekanauki.pl/articles/368955.pdf

Data publikacji:

2011

Wydawca:

Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH

Tematy:

aktywna redukcja hałasu
płyta drgająca
nieliniowe sterowanie
kompensacja
emisja dźwięku
adaptacja
ekwalizacja
active noise control
active structural acoustic control
vibrating plate
sound radiation
adaptation
feed-forward
equalization
nonlinear control

Opis:

Active Noise Control (ANC) systems are usually designed in the feed-forward structure with adaptive linear control filters. However, performance of such systems, when a vibrating plate is used as the secondary source, may be poor due to significant non-linearity of the plate response. The linear systems are then unable to cope with higher harmonics generated by the nonlinearity. One solution to this problem is to apply a nonlinear ANC algorithm. However, it adds additional complexity to this layer. It is particularly severe for multichannel systems, where the algorithms are complex by themselves, and making them nonlinear may significantly reduce their scalability. In this paper, another approach is proposed. Multiple actuators are mounted on a single plate, in order to effectively excite more vibration modes and generate a higher acoustic power, than in case of a single actuator. The response of the vibrating plate as the sound source is then linearized with a set of nonlinear finite impulse response filters, operating individually for each actuator. The Filtered-x LMS algorithm is adopted to update parameters of the nonlinear filters. The control system is experimentally verified and obtained results are reported.
Systemy aktywnej redukcji hałasu zwykle projektowane są w strukturze kompensacyjnej z adaptacyjnymi liniowymi filtrami sterującymi. Wówczas, w przypadku zastosowania płyty drgającej jako źródła dźwięku, skuteczność działania może być zmniejszona z powodu występujących nieliniowości w torze wtórnym. Liniowy układ kompensacji nie jest w stanie poradzić sobie z wyższymi harmonicznymi generowanymi przez nieliniowości. Jednym z rozwiązań jest zastosowanie nieliniowego algorytmu aktywnej redukcji hałasu. Zwiększa to jednak złożoność układu w tej warstwie sterowania. W przypadku wielokanałowych systemów aktywnej redukcji hałasu, które same w sobie są złożone, wprowadzenie nieliniowości w algorytmie znacząco zmniejsza skalowalność całego systemu. W niniejszym artykule zaproponowane jest inne podejście. Aby zapewnić efektywne pobudzenie większej liczby mod i uzyskanie większej mocy akustycznej jak w przypadku pojedynczego elementu wzbudzającego, zastosowano wiele elementów wykonawczych wzbudzających drgania. Odpowiedź płyty drgającej pełniącej rolę złożonego źródła dźwięku jest linearyzowana przez zbiór nieliniowych filtrów o skończonej odpowiedzi impulsowej działających niezależnie na poszczególne elementy wykonawcze. Do aktualizacji parametrów filtrów nieliniowych zastosowany jest algorytm Filtered-x LMS. Zaproponowany system sterowania został poddany weryfikacji eksperymentalnej, a uzyskane wyniki zostały zaprezentowane i skomentowane.

Źródło:

Mechanics and Control; 2011, 30, 3; 146-150
2083-6759
2300-7079

Pojawia się w:

Mechanics and Control

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 63.

Tytuł:

Finite horizon nonlinear predictive control by the Taylor approximation: Application to robot tracking trajectory

Autorzy:

Hedjar, R.
Toumi, R.
Boucher, P.
Dumur, D.

Powiązania:

https://bibliotekanauki.pl/articles/908454.pdf

Data publikacji:

2005

Wydawca:

Uniwersytet Zielonogórski. Oficyna Wydawnicza

Tematy:

układ nieliniowy
układ ciągły
sterowanie predykcyjne
aproksymacja Taylora
śledzenie trajektorii
nonlinear continuous time predictive control
Taylor approximation
tracking trajectory and robot

Opis:

In industrial control systems, practical interest is driven by the fact that today’s processes need to be operated under tighter performance specifications. Often these demands can only be met when process nonlinearities are explicitly considered in the controller. Nonlinear predictive control, the extension of well-established linear predictive control to nonlinear systems, appears to be a well-suited approach for this kind of problems. In this paper, an optimal nonlinear predictive control structure, which provides asymptotic tracking of smooth reference trajectories, is presented. The controller is based on a finite–horizon continuous time minimization of nonlinear predicted tracking errors. A key feature of the control law is that its implementation does not need to perform on-line optimization, and asymptotic tracking of smooth reference signal is guaranteed. An integral action is used to increase the robustness of the closed-loop system with respect to uncertainties and parameters variations. The proposed control scheme is first applied to planning motions problem of a mobile robot and, afterwards, to the trajectory tracking problem of a rigid link manipulator. Simulation results are performed to validate the tracking performance of the proposed controller.

Źródło:

International Journal of Applied Mathematics and Computer Science; 2005, 15, 4; 527-540
1641-876X
2083-8492

Pojawia się w:

International Journal of Applied Mathematics and Computer Science

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 64.

Tytuł:

Finite-Dimensional Control of Nonlinear Parabolic Pde Systems With Time-Dependent Spatial Domains Using Empirical Eigenfunctions

Autorzy:

Armaou, A.
Christofides, P. D.

Powiązania:

https://bibliotekanauki.pl/articles/908332.pdf

Data publikacji:

2001

Wydawca:

Uniwersytet Zielonogórski. Oficyna Wydawnicza

Tematy:

sterowanie nieliniowe
sterowanie skończenie wymiarowe
Karhunen-Loeve expansion
Galerkin's method
nonlinear control
diffusion-reaction processes with moving boundaries

Opis:

This article presents a methodology for the synthesis of finite-dimensional nonlinear output feedback controllers for nonlinear parabolic partial differential equation (PDE) systems with time-dependent spatial domains. Initially, the nonlinear parabolic PDE system is expressed with respect to an appropriate time-invariant spatial coordinate, and a representative (with respect to different initial conditions and input perturbations) ensemble of solutions of the resulting time-varying PDE system is constructed by computing and solving a high-order discretization of the PDE. Then, the Karhunen-Loeve expansion is directly applied to the ensemble of solutions to derive a small set of empirical eigenfunctions (dominant spatial patterns) that capture almost all the energy of the ensemble of solutions. The empirical eigenfunctions are subsequently used as basis functions within a Galerkin model reduction framework to derive low-order ordinary differential equation (ODE) systems that accurately describe the dominant dynamics of the PDE system. The ODE systems are subsequently used for the synthesis of nonlinear output feedback controllers using geometric control methods. The proposed control method is used to stabilize an unstable steady-state of a diffusion-reaction process with nonlinearities, spatially-varying coefficients and time-dependent spatial domain, and is shown to lead to the construction of accurate low-order models and the synthesis of low-order controllers. The performance of the low-order models and controllers is successfully tested through computer simulations.

Źródło:

International Journal of Applied Mathematics and Computer Science; 2001, 11, 2; 287-317
1641-876X
2083-8492

Pojawia się w:

International Journal of Applied Mathematics and Computer Science

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 65.

Tytuł:

Friction compensation in nonlinear dynamical systems using fault-tolerant control methods

Autorzy:

Bonfè, M.
Castaldi, P.
Preda, N.
Simani, S.

Powiązania:

https://bibliotekanauki.pl/articles/327170.pdf

Data publikacji:

2013

Wydawca:

Polska Akademia Nauk. Polskie Towarzystwo Diagnostyki Technicznej PAN

Tematy:

fault-tolerant control
friction compensation
nonlinear systems
differential geometry

Opis:

This paper describes the application of differential geometry and nonlinear systems analysis to the estimation of friction effects in a class of mechanical systems. The proposed methodology relies on adaptive filters, designed with a nonlinear geometric approach to obtain the disturbance de-coupling property, for the estimation of the friction force. Thanks to accurate estimation, friction effects are compensated by injecting the on-line estimate of friction force to the control action calculated by a standard linear state feedback. The inverted pendulum on a cart is considered as an application example and the proposed approach is compared with a commonly used friction compensation strategy, based on an explicit model of the friction force.

Źródło:

Diagnostyka; 2013, 14, 4; 13-19
1641-6414
2449-5220

Pojawia się w:

Diagnostyka

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 66.

Tytuł:

Fundamental limitations of the decay of generalized energy in controlled (discrete-time) nonlinear systems subject to state and input constraints

Autorzy:

Selek, István
Ikonen, Enso

Powiązania:

https://bibliotekanauki.pl/articles/330074.pdf

Data publikacji:

2019

Wydawca:

Uniwersytet Zielonogórski. Oficyna Wydawnicza

Tematy:

decay rate maximization
Lyapunov function
nonlinear control system
rozkład wykładniczy
funkcja Lapunowa
układ sterowania nieliniowy

Opis:

This paper is devoted to the analysis of fundamental limitations regarding closed-loop control performance of discrete-time nonlinear systems subject to hard constraints (which are nonlinear in state and manipulated input variables). The control performance for the problem of interest is quantified by the decline (decay) of the generalized energy of the controlled system. The paper develops (upper and lower) barriers bounding the decay of the system’s generalized energy, which can be achieved over a set of asymptotically stabilizing feedback laws. The corresponding problem is treated without the loss of generality, resulting in a theoretical framework that provides a solid basis for practical implementations. To enhance understanding, the main results are illustrated in a simple example.

Źródło:

International Journal of Applied Mathematics and Computer Science; 2019, 29, 4; 629-639
1641-876X
2083-8492

Pojawia się w:

International Journal of Applied Mathematics and Computer Science

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 67.

Tytuł:

Fuzzy adaptive control of a class of MISO nonlinear systems

Autorzy:

Lagrat, I.
Ouakka, H.
Boutnhidi, I.

Powiązania:

https://bibliotekanauki.pl/articles/971004.pdf

Data publikacji:

2008

Wydawca:

Polska Akademia Nauk. Instytut Badań Systemowych PAN

Tematy:

identyfikacja
sterowanie adaptacyjne
układ nieliniowy
MISO systems
identification
fuzzy clustering
Takagi-Sugeno fuzzy model
adaptive control
nonlinear system

Opis:

This paper presents a fuzzy adaptive control of a class of MISO nonlinear systems. The dynamic behaviour of each MISO systems is composed of a nonlinear term, interactions effect between the inputs, and disturbances. In these circumstances, adaptive control becomes very difficult to implement and not always an evident task. Thus, the MISO system is approximated by the Takagi-Sugeno fuzzy model. The advantage of this approximation is beneficial in the sense that it allows for converting the nonlinear problem into a linear one. In this respect, the coupling, nonlinearity and unmodeled dynamics are easily compensated. The identification and the control are conducted at the level of each local linear model based on fuzzy approach. The computational load and the complexity of nonlinear approach are reduced and permit wide applicability. The validity and the performance are tested numerically.

Źródło:

Control and Cybernetics; 2008, 37, 1; 177-190
0324-8569

Pojawia się w:

Control and Cybernetics

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 68.

Tytuł:

Fuzzy adaptive control of nonlinear two-mass system

Autorzy:

Wróbel, K.

Powiązania:

https://bibliotekanauki.pl/articles/1193270.pdf

Data publikacji:

2016

Wydawca:

Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej

Tematy:

fuzzy control
adaptive control
nonlinear two-mass system
compensation of friction

Opis:

In the paper, an adaptive control MRAS-based structure for nonlinear two-mass system is proposed. The performance of the control structure is supported by additional compensator. After short introduction a mathematical model of the drive system is presented. In the plant, the additional nonlinearities such as friction and mechanical hysteresis are considered. Then the structure of the fuzzy system is shown. Contrary to the majority of papers the controller considered is based on the II type fuzzy sets. Then the simulation tests showing performance of the proposed structure are presented. The drive is tested at different operation points, including low-speed region where friction plays dominant role. A comparison of classical PI controller with antiwindup and the proposed structure is presented. Then laboratory set-up with DC motor is described briefly. Experimental results are included in the paper. It is shown that the torsional vibrations of two-mass system are damped effectively. The impact of the existing delays of system is discussed. A summary is given at the end of the paper.

Źródło:

Power Electronics and Drives; 2016, 1, 36/2; 133-146
2451-0262
2543-4292

Pojawia się w:

Power Electronics and Drives

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 69.

Tytuł:

Geometry and flatness of m-crane systems

Autorzy:

Nowicki, M.
Respondek, W.
Piasek, J.
Kozłowski, K.

Powiązania:

https://bibliotekanauki.pl/articles/201728.pdf

Data publikacji:

2019

Wydawca:

Polska Akademia Nauk. Czytelnia Czasopism PAN

Tematy:

differential flatness
crane
chained systems
feedback equivalence
accessibility
nonlinear control

Opis:

We propose a class of m-crane control systems that generalizes two- and three-dimensional crane systems. We prove that each representant of the described class is feedback equivalent to the second order chained form with drift. In consequence, we prove that it is differentially flat. Then we investigate its control properties and derive a control law for tracking control problem.

Źródło:

Bulletin of the Polish Academy of Sciences. Technical Sciences; 2019, 67, 5; 893-903
0239-7528

Pojawia się w:

Bulletin of the Polish Academy of Sciences. Technical Sciences

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 70.

Tytuł:

Global linearization of nonlinear systems - A survey

Autorzy:

Čelikovský, Sergej

Powiązania:

https://bibliotekanauki.pl/articles/1359660.pdf

Data publikacji:

1995

Wydawca:

Polska Akademia Nauk. Instytut Matematyczny PAN

Tematy:

exact linearization
nonlinear control
global linearization

Opis:

A survey of the global linearization problem is presented. Known results are divided into two groups: results for general affine nonlinear systems and for bilinear systems. In the latter case stronger results are available. A comparision of various linearizing transformations is performed. Numerous illustrative examples are included.

Źródło:

Banach Center Publications; 1995, 32, 1; 123-137
0137-6934

Pojawia się w:

Banach Center Publications

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 71.

Tytuł:

Global Stability of Linearizing Control With a New Robust Nonlinear Observer of The Induction Motor

Autorzy:

Chenafa, M.
Mansouri, A.
Bouhenna, A.
Etien, E.
Belaidi, A.
Denai, M. A.

Powiązania:

https://bibliotekanauki.pl/articles/911129.pdf

Data publikacji:

2005

Wydawca:

Uniwersytet Zielonogórski. Oficyna Wydawnicza

Tematy:

obserwatory nieliniowe
sterowanie liniowe
silnik indukcyjny
stabilność globalna
nonlinear observer
linearizing control
induction motor
global stability

Opis:

This paper mainly deals with the design of an advanced control law with an observer for a special class of nonlinear systems. We design an observer with a gain as a function of speed. We study the solution to the output feedback torque and rotor flux-tracking problem for an induction motor model given in the natural frame. We propose a new robust nonlinear observer and prove the global stability of the interlaced controller-observer system. The control algorithm is studied through simulations and applied in many configurations (various set points, flux and speed profiles and torque disturbances), and is shown to be very efficient.

Źródło:

International Journal of Applied Mathematics and Computer Science; 2005, 15, 2; 235-243
1641-876X
2083-8492

Pojawia się w:

International Journal of Applied Mathematics and Computer Science

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 72.

Tytuł:

Hammerstein Nonlinear Active Noise Control with the Filtered-Error LMS Algorithm

Autorzy:

Mazur, K.
Pawełczyk, M.

Powiązania:

https://bibliotekanauki.pl/articles/176841.pdf

Data publikacji:

2013

Wydawca:

Polska Akademia Nauk. Czytelnia Czasopism PAN

Tematy:

active noise-vibration control
active structural acoustic control
adaptive algorithm
nonlinear system

Opis:

Active Noise Control (ANC) of noise transmitted through a vibrating plate causes many problems not observed in classical ANC using loudspeakers. They are mainly due to vibrations of a not ideally clamped plate and use of nonlinear actuators, like MFC patches. In case of noise transmission though a plate, nonlinerities exist in both primary and secondary paths. Existence of nonlinerities in the system may degrade performance of a linear feedforward control system usually used for ANC. The performance degradation is especially visible for simple deterministic noise, such as tonal noise, where very high reduction is expected. Linear feedforward systems in such cases are unable to cope with higher harmonics generated by the nonlinearities. Moreover, nonlinearities, if not properly tackled with, may cause divergence of an adaptive control system. In this paper a feedforward ANC system reducing sound transmitted through a vibrating plate is presented. The ANC system uses nonlinear control filters to suppress negative effects of nonlinearies in the system. Filtered-error LMS algorithm, found more suitable than usually used Filtered-reference LMS algorithm, is employed for updating parameters of the nonlinear filters. The control system is experimentally verified and obtained results are discussed.

Źródło:

Archives of Acoustics; 2013, 38, 2; 197-203
0137-5075

Pojawia się w:

Archives of Acoustics

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 73.

Tytuł:

Heating control of a finite rod with a mobile source

Autorzy:

Jilavyan, Samvel H.
Grigoryan, Edmon R.
Khurshudyan, Asatur Zh.

Powiązania:

https://bibliotekanauki.pl/articles/1409386.pdf

Data publikacji:

2021

Wydawca:

Polska Akademia Nauk. Czytelnia Czasopism PAN

Tematy:

null-controllability
mobile control
nonlinear constraints
triangular wave
rectangular wave
Green’s function approach
heuristic control
lack of exact controllability

Opis:

The Green’s function approach is applied for studying the exact and approximate null-controllability of a finite rod in finite time by means of a source moving along the rod with controllable trajectory. The intensity of the source remains constant. Applying the recently developed Green’s function approach, the analysis of the exact null-controllability is reduced to an infinite system of nonlinear constraints with respect to the control function. A sufficient condition for the approximate null-controllability of the rod is obtained. Since the exact solution of the system of constraints is a long-standing open problem, some heuristic solutions are used instead. The efficiency of these solutions is shown on particular cases of approximate controllability.

Źródło:

Archives of Control Sciences; 2021, 31, 2; 417-430
1230-2384

Pojawia się w:

Archives of Control Sciences

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 74.

Tytuł:

Heuristic control of nonlinear power systems: Application to the infinite bus problem

Autorzy:

Hossain, Musabbir Md
Khurshudyan, Asatur Zh.

Powiązania:

https://bibliotekanauki.pl/articles/229161.pdf

Data publikacji:

2019

Wydawca:

Polska Akademia Nauk. Czytelnia Czasopism PAN

Tematy:

power systems
nonlinear control
heuristic method
harmonic control
piecewise constant control

Opis:

In this paper, we apply the heuristic method for determination of control functions for controllability analysis of nonlinear power systems. The problem of control of quasi-linear systems under proper assumptions on the nonlinear term is considered in the general statement. Making use of the Green’s function solution of nonlinear systems, the exact and approximate controllability conditions are expressed in terms of unknown controls in an explicit form. The way of resolving controls determination is discussed. As a particular application, a one-machine infinite-bus system is considered described by a coupled system of three first order ordinary differential equations. Two heuristic forms of admissible controls are considered providing approximate controllability within the same amount of time having different intensities. Results of numerical simulations are presented and discussed.

Źródło:

Archives of Control Sciences; 2019, 29, 2; 279-288
1230-2384

Pojawia się w:

Archives of Control Sciences

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 75.

Tytuł:

How to compensate a spreading disturbance for a class of nonlinear systems

Autorzy:

Quaraai, Y.
Bernoussi, A. S.
El Jai, A.

Powiązania:

https://bibliotekanauki.pl/articles/907943.pdf

Data publikacji:

2008

Wydawca:

Uniwersytet Zielonogórski. Oficyna Wydawnicza

Tematy:

zaburzenia
sterowanie
system nieliniowy
system rozproszony
distributed nonlinear systems
disturbance
spreadability
remediability
control

Opis:

We consider a system which is assumed to be affected by an expanding disturbance which occurs at the initial time. The compensation of the disturbance is accomplished by extending the concept of remediability to a class of nonlinear systems. The results are implemented and illustrated with a nonlinear distributed model.

Źródło:

International Journal of Applied Mathematics and Computer Science; 2008, 18, 2; 171-187
1641-876X
2083-8492

Pojawia się w:

International Journal of Applied Mathematics and Computer Science

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 76.

Tytuł:

Infinitesimal Brunovský form for nonlinear systems with applications to Dynamic Linearization

Autorzy:

Aranda-Bricaire, E.
Moog, C.
Pomet, J.

Powiązania:

https://bibliotekanauki.pl/articles/1359653.pdf

Data publikacji:

1995

Wydawca:

Polska Akademia Nauk. Instytut Matematyczny PAN

Tematy:

flat systems
dynamic feedback linearization
Brunovský canonical form
nonlinear control systems
endogenous dynamic feedback
Pfaffian systems
linearized control system

Opis:

We define, in an infinite-dimensional differential geometric framework, the 'infinitesimal Brunovský form' which we previously introduced in another framework and link it with equivalence via diffeomorphism to a linear system, which is the same as linearizability by 'endogenous dynamic feedback'.

Źródło:

Banach Center Publications; 1995, 32, 1; 19-33
0137-6934

Pojawia się w:

Banach Center Publications

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 77.

Tytuł:

Input constraints handling in an MPC/feedback linearization scheme

Autorzy:

Deng, J.
Becerra, V. M.
Stobart, R.

Powiązania:

https://bibliotekanauki.pl/articles/907653.pdf

Data publikacji:

2009

Wydawca:

Uniwersytet Zielonogórski. Oficyna Wydawnicza

Tematy:

sterowanie predykcyjne
sterowanie odwrotne
sieć neuronowa
system nieliniowy
predictive control
feedback linearization
neural network
nonlinear system
constraints

Opis:

The combination of model predictive control based on linear models (MPC) with feedback linearization (FL) has attracted interest for a number of years, giving rise to MPC+FL control schemes. An important advantage of such schemes is that feedback linearizable plants can be controlled with a linear predictive controller with a fixed model. Handling input constraints within such schemes is difficult since simple bound contraints on the input become state dependent because of the nonlinear transformation introduced by feedback linearization. This paper introduces a technique for handling input constraints within a real timeMPC/FL scheme, where the plant model employed is a class of dynamic neural networks. The technique is based on a simple affine transformation of the feasible area. A simulated case study is presented to illustrate the use and benefits of the technique.

Źródło:

International Journal of Applied Mathematics and Computer Science; 2009, 19, 2; 219-232
1641-876X
2083-8492

Pojawia się w:

International Journal of Applied Mathematics and Computer Science

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 78.

Tytuł:

Kompensacja drgań belki kompozytowej przy wykorzystaniu aktywnych przetworników piezoelektrycznych sterowanych nieliniowym regulatorem
Compensation of mechanical vibrations of composite beam by using piezoelectric actuators with nonlinear controller

Autorzy:

Filipek, P.

Powiązania:

https://bibliotekanauki.pl/articles/157064.pdf

Data publikacji:

2010

Wydawca:

Stowarzyszenie Inżynierów i Techników Mechaników Polskich

Tematy:

aktywne tłumienie drgań mechanicznych
piezoelektryk aktywny
regulacja nieliniowa
active vibration damping
nonlinear control

Opis:

Artykuł prezentuje wyniki badań układu kompensacji drgań mechanicznych belki jednostronnie utwierdzonej przy wykorzystaniu aktuatorów piezoelektrycznych sterowanych regulatorem nieliniowym opartym na zjawisku nasycenia. Jako aktywator tłumiący drgania zastosowano przetwornik piezoelektryczny typu MFC, którego pracę nadzorował procesor DSP. Przeprowadzone badania numeryczne i laboratoryjne wykazały dużą skuteczność działania algorytmu, ale tylko przy dopasowaniu częstotliwości regulatora do pobudzenia belki, oraz wykazały znaczne pogorszenie tłumienia drgań przy ich odstrojeniu lub nieoptymalnych parametrach regulatora.
Damping of active vibrations of a cantilever beam by a piezoelectric actuator with nonlinear controller based on saturation phenomena is analysed in the paper. The MFC M-8503P1 (Macro Fiber Composite) element is used as a piezoactuator in the laboratory setup. The control algorithm is computed by TMS320F2812 DSP system. Both numerical and laboratory tests confirmed high efficiency of the considered method, but only for the optimal controller parameters and the external force frequency equal to the beam natural frequency. Even the difference between the frequencies equal to 1% caused a considerable loss of algorithm performances. Unsuitable controller parameters have a similar effect on vibration compensation causing increase in the vibration amplitude and appearance of additional oscillations. In a real system the natural beam frequency can vary during operation with the change of ambient conditions and ageing effect. Thus, there is a need for an adaptive system adjusting frequency and parameters of the controller. The investigated control method is very sensitive to external noises resulting in piezoactuator excitation, and because of that it is necessary to implement analog and digital low-pass filters.

Źródło:

Pomiary Automatyka Kontrola; 2010, R. 56, nr 5, 5; 423-426
0032-4140

Pojawia się w:

Pomiary Automatyka Kontrola

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 79.

Tytuł:

Linear adaptive structure for control of a nonlinear MIMO dynamic plant

Autorzy:

Bańka, S.
Dworak, P.
Jaroszewski, K.

Powiązania:

https://bibliotekanauki.pl/articles/329882.pdf

Data publikacji:

2013

Wydawca:

Uniwersytet Zielonogórski. Oficyna Wydawnicza

Tematy:

MIMO multivariable control systems
nonlinear system
modal control
wielowymiarowy układ sterowania
układ nieliniowy
sterowanie modalne

Opis:

In the paper an adaptive linear control system structure with modal controllers for a MIMO nonlinear dynamic process is presented and various methods for synthesis of those controllers are analyzed. The problems under study are exemplified by the synthesis of a position and yaw angle control system for a drillship described by a 3DOF nonlinear mathematical model of low-frequency motions made by the drillship over the drilling point. In the proposed control system, use is made of a set of (stable) linear modal controllers that create a linear adaptive controller with variable parameters tuned appropriately to operation conditions chosen on the basis of two measured auxiliary signals. These are the ship’s current forward speed measured in reference to the water and the systematically calculated difference between the course angle and the sea current (yaw angle). The system synthesis is carried out by means of four different methods for system pole placement after having linearized the model of low-frequency motions made by the vessel at its nominal “operating points” in steady states that are dependent on the specified yaw angle and the sea current velocity. The final part of the paper includes simulation results of system operation with an adaptive controller of (stepwise) varying parameters along with conclusions and final remarks.

Źródło:

International Journal of Applied Mathematics and Computer Science; 2013, 23, 1; 47-63
1641-876X
2083-8492

Pojawia się w:

International Journal of Applied Mathematics and Computer Science

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 80.

Tytuł:

LMI-based robust control of uncertain nonlinear systems via polytopes of polynomials

Autorzy:

Sánchez, Marcelino
Bernal, Miguel

Powiązania:

https://bibliotekanauki.pl/articles/330548.pdf

Data publikacji:

2019

Wydawca:

Uniwersytet Zielonogórski. Oficyna Wydawnicza

Tematy:

robust control
uncertain system
nonlinear system
linear parameter-varying systems
LMIs
sterowanie odporne
układ niepewny
układ nieliniowy
układ liniowy niestacjonarny

Opis:

This investigation is concerned with robust analysis and control of uncertain nonlinear systems with parametric uncertainties. In contrast to the methodologies from the field of linear parameter varying systems, which employ convex structures of the state space representation in order to perform analysis and design, the proposed approach makes use of a polytopic form of a generalisation of the characteristic polynomial, which proves to outperform former results on the subject. Moreover, the derived conditions have the advantage of being cast as linear matrix inequalities under mild assumptions.

Źródło:

International Journal of Applied Mathematics and Computer Science; 2019, 29, 2; 275-283
1641-876X
2083-8492

Pojawia się w:

International Journal of Applied Mathematics and Computer Science

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 81.

Tytuł:

Loopshaping of motor torque controller

Autorzy:

Sieklucki, G.

Powiązania:

https://bibliotekanauki.pl/articles/229950.pdf

Data publikacji:

2013

Wydawca:

Polska Akademia Nauk. Czytelnia Czasopism PAN

Tematy:

electric drive
II2 controller
robust control
stability region
parametric optimization
nonlinear programming
waterbed effect
weighted sensitivity
modulus criterion

Opis:

The controller synthesis problem of the motor torque is presented. The tuning of the II2 controller parameters of the electromagnetic motor torque is introduced. The results are obtained by applying the weighted sensitivity method (nominal performance) which is the optimization in H∞ space. The waterbed effect for some weighting functions is presented. The results, which are obtained by a parametric optimization (nonlinear programming), are analysed by the calculations of the stability margins.

Źródło:

Archives of Control Sciences; 2013, 23, 2; 213-228
1230-2384

Pojawia się w:

Archives of Control Sciences

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 82.

Tytuł:

Method of cooperative formation control for underactuated USVs based on nonlinear backstepping and cascade system theory

Autorzy:

Dong, Zaopeng
Liu, Yang
Wang, Hao
Qin, Tao

Powiązania:

https://bibliotekanauki.pl/articles/1573634.pdf

Data publikacji:

2021

Wydawca:

Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa

Tematy:

unmanned surface vehicle (USV)
cooperative formation control
underactuated system
nonlinear backstepping
cascade system theory

Opis:

This paper presents a method for the cooperative formation control of a group of underactuated USVs. The problem of formation control is first converted to one of stabilisation control of the tracking errors of the follower USVs using system state transformation design. The followers must keep a fixed distance from the leader USV and a specific heading angle in order to maintain a certain type of formation. A global differential homeomorphism transformation is then designed to create a tracking error system for the follower USVs, in order to simplify the description of the control system. This makes the complex formation control system easy to analyse, and allows it to be decomposed into a cascaded system. In addition, several intermediate state variables and virtual control laws are designed based on nonlinear backstepping, and actual control algorithms for the follower USVs to control the surge force and yaw moment are presented. A global system that can ensure uniform asymptotic stability of the USVs’ cooperative formation control is achieved by combining Lyapunov stability theory and cascade system theory. Finally, several simulation experiments are carried out to verify the validity, stability and reliability of our cooperative formation control method.

Źródło:

Polish Maritime Research; 2021, 1; 149-162
1233-2585

Pojawia się w:

Polish Maritime Research

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 83.

Tytuł:

Modeling and Control of Induction Motors

Autorzy:

Delaleau, E.
Louis, J. P.
Ortega, R.

Powiązania:

https://bibliotekanauki.pl/articles/908324.pdf

Data publikacji:

2001

Wydawca:

Uniwersytet Zielonogórski. Oficyna Wydawnicza

Tematy:

silnik indukcyjny
sterowanie
induction motors
field oriented control
passivity based control
flatness based control
nonlinear control

Opis:

This paper is devoted to the modeling and control of the induction motor. The well-established field oriented control is recalled and two recent control strategies are exposed, namely the passivity-based control and the flatness-based control.

Źródło:

International Journal of Applied Mathematics and Computer Science; 2001, 11, 1; 105-129
1641-876X
2083-8492

Pojawia się w:

International Journal of Applied Mathematics and Computer Science

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 84.

Tytuł:

Modeling nonlinear road traffic networks for junction control

Autorzy:

Péter, T.

Powiązania:

https://bibliotekanauki.pl/articles/330975.pdf

Data publikacji:

2012

Wydawca:

Uniwersytet Zielonogórski. Oficyna Wydawnicza

Tematy:

modelowanie matematyczne
układ dodatni nieliniowy
liniowa funkcja Lapunowa
mathematical modeling
mathematical control
traffic networks
nonlinear positive system
linear Lyapunov function

Opis:

The paper introduces a method of mathematical modeling of high scale road traffic networks, where a new special hypermatrix structure is intended to be used. The structure describes the inner-inner, inner-outer and outer-outer relations, and laws of a network area. The research examines the nonlinear equation system. The analysed model can be applied to the testing and planning of large-scale road traffic networks and the regulation of traffic systems. The elaborated model is in state space form, where the states are vehicle densities on a particular lane and the dynamics are described by a nonlinear state constrained positive system. This model can be used directly for simulation and analysis and as a starting point for investigating various control strategies. The stability of the traffic over the network can be analyzed by constructing a linear Lyapunov function and the associated theory. The model points out that in intersection control one must take the traffic density values of both the input and the output sections into account. Generally, the control of any domain has to take the density of input and output sections into consideration.

Źródło:

International Journal of Applied Mathematics and Computer Science; 2012, 22, 3; 723-732
1641-876X
2083-8492

Pojawia się w:

International Journal of Applied Mathematics and Computer Science

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 85.

Tytuł:

Modified algorithms of direct power control of AC/DC converter co-operating with the grid

Autorzy:

Kulikowski, K.

Powiązania:

https://bibliotekanauki.pl/articles/141289.pdf

Data publikacji:

2012

Wydawca:

Polska Akademia Nauk. Czytelnia Czasopism PAN

Tematy:

DPC
optymalizacja sposobu DPC
nieliniowe sterowanie
optimization of DPC method
three-level converter
nonlinear control

Opis:

This paper briefly describes direct power control methods for two- and threelevel AC/DC converters and their modified DPC 3H 2-? and the DPC 5H2-? algorithms. It also presents two new control methods DPC-3Am (direct power control 3 areas with modification) and the DPC-3L-3Am (direct power control 3 levels 3 areas with modification). The research results were used to compare the described methods. The comparison was based on an average value of switching frequency and current distortion coefficient. Experimental investigations into the methods have shown that the use of the modified DPC methods reduces the number of switchings by more than 70% compared with the standard DPC method.

Źródło:

Archives of Electrical Engineering; 2012, 61, 3; 373-388
1427-4221
2300-2506

Pojawia się w:

Archives of Electrical Engineering

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 86.

Tytuł:

Motion direction control of a robot based on chaotic synchronization phenomena

Autorzy:

Volos, C. K.

Powiązania:

https://bibliotekanauki.pl/articles/384720.pdf

Data publikacji:

2013

Wydawca:

Sieć Badawcza Łukasiewicz - Przemysłowy Instytut Automatyki i Pomiarów

Tematy:

humanoid robot
motion direction control
nonlinear circuit
chaos
true random bits generator
complete synchronization
inverse π-lag synchronization

Opis:

This work presents chaotic motion direction control of a robot and especially of a humanoid robot, in order to achieve complete coverage of the entire work terrain with unpredictable way. The method, which is used, is based on a chaotic true random bits generator. The coexistence of two different synchronization phenomena between mutually coupled identical nonlinear circuits, the well-known complete chaotic synchronization and the recently new proposed inverse π-lag synchronization, is the main feature of the proposed chaotic generator. Computer simulations confirm that the proposed method can obtain very satisfactory results in regard to the fast scan of the entire robot’s work terrain.

Źródło:

Journal of Automation Mobile Robotics and Intelligent Systems; 2013, 7, 2; 64-69
1897-8649
2080-2145

Pojawia się w:

Journal of Automation Mobile Robotics and Intelligent Systems

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 87.

Tytuł:

Neural control of a robotic manipulator in contact with a flexible and uncertain environment

Autorzy:

Gierlak, Piotr

Powiązania:

https://bibliotekanauki.pl/articles/2233648.pdf

Data publikacji:

2023

Wydawca:

Politechnika Białostocka. Oficyna Wydawnicza Politechniki Białostockiej

Tematy:

robotics
robot control
nonlinear control systems

Opis:

This article presents the synthesis of a neural motion control system of a robot caused by disturbances of constraints limiting the movement, which are the result of flexibility and disturbances of the contact surface. A synthesis of the control law is presented, in which the knowledge of the robot's dynamics and the parameters of a susceptible environment is not required. Moreover, the stability of the system is guaranteed in the case of an inaccurately known surface of the environment. This was achieved by introducing an additional module to the control law in directions normal to the surface of the environment. This additional term can be interpreted as the virtual viscotic resistance and spring force acting on the robot. This approach ensured the self-regulation of the robot’s interaction force with the compliant environment, limiting the impact of the geometrical inaccuracy of the environment.

Źródło:

Acta Mechanica et Automatica; 2023, 17, 3; 435--444
1898-4088
2300-5319

Pojawia się w:

Acta Mechanica et Automatica

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 88.

Tytuł:

Neural network-based MRAC control of dynamic nonlinear systems

Autorzy:

Debbache, G.
Bennia, A.
Goléa, N.

Powiązania:

https://bibliotekanauki.pl/articles/908401.pdf

Data publikacji:

2006

Wydawca:

Uniwersytet Zielonogórski. Oficyna Wydawnicza

Tematy:

sieć neuronowa
model odniesienia
system nieliniowy
sterowanie adaptacyjne
obserwator
stabilność
neural networks
reference model
nonlinear systems
adaptive control
observer
stability

Opis:

This paper presents direct model reference adaptive control for a class of nonlinear systems with unknown nonlinearities. The model following conditions are assured by using adaptive neural networks as the nonlinear state feedback controller. Both full state information and observer-based schemes are investigated. All the signals in the closed loop are guaranteed to be bounded and the system state is proven to converge to a small neighborhood of the reference model state. It is also shown that stability conditions can be formulated as linear matrix inequalities (LMI) that can be solved using efficient software algorithms. The control performance of the closed-loop system is guaranteed by suitably choosing the design parameters. Simulation results are presented to show the effectiveness of the approach.

Źródło:

International Journal of Applied Mathematics and Computer Science; 2006, 16, 2; 219-232
1641-876X
2083-8492

Pojawia się w:

International Journal of Applied Mathematics and Computer Science

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 89.

Tytuł:

Neural Network-Based Narx Models in Non-Linear Adaptive Control

Autorzy:

Dzieliński, A.

Powiązania:

https://bibliotekanauki.pl/articles/907986.pdf

Data publikacji:

2002

Wydawca:

Uniwersytet Zielonogórski. Oficyna Wydawnicza

Tematy:

automatyka
neural networks
adaptive control
nonlinear systems

Opis:

The applicability of approximate NARX models of non-linear dynamic systems is discussed. The models are obtained by a new version of Fourier analysis-based neural network also described in the paper. This constitutes a reformulation of a known method in a recursive manner, i.e. adapted to account for incoming data on-line. The method allows us to obtain an approximate model of the non-linear system. The estimation of the influence of the modelling error on the discrepancy between the model and real system outputs is given. Possible applications of this approach to the design of BIBO stable closed-loop control are proposed.

Źródło:

International Journal of Applied Mathematics and Computer Science; 2002, 12, 2; 235-240
1641-876X
2083-8492

Pojawia się w:

International Journal of Applied Mathematics and Computer Science

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 90.

Tytuł:

Neural-sliding mode augmented robust controller for autolanding of fixed wing aircraft

Autorzy:

Ismail, I.
Pashilkar, A. A.
Ayyagari, R.
Sundararajan, N.

Powiązania:

https://bibliotekanauki.pl/articles/91533.pdf

Data publikacji:

2012

Wydawca:

Społeczna Akademia Nauk w Łodzi. Polskie Towarzystwo Sieci Neuronowych

Tematy:

controller
nonlinear dynamic inversion
control signal
phase compensator
antiwindup scheme
wing aircraft
autolanding

Opis:

Neural and sliding mode controllers are generally based on the principle of nonlinear dynamic inversion. This leads to control signals containing high frequency components. This can result in actuator rate limiting due to loss of phase at higher frequencies. Large control inputs, for example due to the saturation component of the sliding mode controller can also result in position saturation of the actuator. In this paper we show that by the introduction of suitable phase compensators and an antiwindup scheme the neuralaided sliding mode controller performance can be improved. A novel scheme is proposed for the cascaded feedback controller which addresses practical requirements of both state limiting and control surface saturation respectively.

Źródło:

Journal of Artificial Intelligence and Soft Computing Research; 2012, 2, 4; 317-330
2083-2567
2449-6499

Pojawia się w:

Journal of Artificial Intelligence and Soft Computing Research

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 91.

Tytuł:

NFTSM control of direct yaw moment for autonomous electric vehicles with consideration of tire nonlinear mechanical properties

Autorzy:

Sun, Xiaoqiang
Wang, Yujun
Cai, Yingfeng
Wong, Pak Kin
Chen, Long

Powiązania:

https://bibliotekanauki.pl/articles/2173619.pdf

Data publikacji:

2021

Wydawca:

Polska Akademia Nauk. Czytelnia Czasopism PAN

Tematy:

autonomous electric vehicles
direct yaw moment control
DYC
tire nonlinear mechanical properties
nonsingular fast terminal sliding mode
NFTSM
trust-region interior-point method
pojazd elektryczny autonomiczny
kontrola momentu odchylenia bezpośrednia
właściwości mechaniczne opon nieliniowe
niesingularny tryb szybkiego przesuwania terminala
metoda punktu wewnętrznego regionu zaufania

Opis:

To improve the curve driving stability and safety under critical maneuvers for four-wheel-independent drive autonomous electric vehicles, a three-stage direct yaw moment control (DYC) strategy design procedure is proposed in this work. The first stage conducts the modeling of the tire nonlinear mechanical properties, i.e. the coupling relationship between the tire longitudinal force and the tire lateral force, which is crucial for the DYC strategy design, in the STI (Systems Technologies Inc.) form based on experimental data. On this basis, a 7-DOF vehicle dynamics model is established and the direct yaw moment calculation problem of the four-wheel-independent drive autonomous electric vehicle is solved through the nonsingular fast terminal sliding mode (NFTSM) control method, thus the optimal direct yaw moment can be obtained. To achieve this direct yaw moment, an optimal allocation problem of the tire forces is further solved by using the trust-region interior-point method, which can effectively guarantee the solving efficiency of complex optimization problem like the tire driving and braking forces allocation of four wheels in this work. Finally, the effectiveness of the DYC strategy proposed for the autonomous electric vehicles is verified through the CarSim-Simulink co-simulation results.

Źródło:

Bulletin of the Polish Academy of Sciences. Technical Sciences; 2021, 69, 3; art. no. e137065
0239-7528

Pojawia się w:

Bulletin of the Polish Academy of Sciences. Technical Sciences

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 92.

Tytuł:

NFTSM control of direct yaw moment for autonomous electric vehicles with consideration of tire nonlinear mechanical properties

Autorzy:

Sun, Xiaoqiang
Wang, Yujun
Cai, Yingfeng
Wong, Pak Kin
Chen, Long

Powiązania:

https://bibliotekanauki.pl/articles/2128162.pdf

Data publikacji:

2021

Wydawca:

Polska Akademia Nauk. Czytelnia Czasopism PAN

Tematy:

autonomous electric vehicles
direct yaw moment control
DYC
tire nonlinear mechanical properties
nonsingular fast terminal sliding mode
NFTSM
trust-region interior-point method
pojazd elektryczny autonomiczny
kontrola momentu odchylenia bezpośrednia
właściwości mechaniczne opon nieliniowe
niesingularny tryb szybkiego przesuwania terminala
metoda punktu wewnętrznego regionu zaufania

Opis:

To improve the curve driving stability and safety under critical maneuvers for four-wheel-independent drive autonomous electric vehicles, a three-stage direct yaw moment control (DYC) strategy design procedure is proposed in this work. The first stage conducts the modeling of the tire nonlinear mechanical properties, i.e. the coupling relationship between the tire longitudinal force and the tire lateral force, which is crucial for the DYC strategy design, in the STI (Systems Technologies Inc.) form based on experimental data. On this basis, a 7-DOF vehicle dynamics model is established and the direct yaw moment calculation problem of the four-wheel-independent drive autonomous electric vehicle is solved through the nonsingular fast terminal sliding mode (NFTSM) control method, thus the optimal direct yaw moment can be obtained. To achieve this direct yaw moment, an optimal allocation problem of the tire forces is further solved by using the trust-region interior-point method, which can effectively guarantee the solving efficiency of complex optimization problem like the tire driving and braking forces allocation of four wheels in this work. Finally, the effectiveness of the DYC strategy proposed for the autonomous electric vehicles is verified through the CarSim-Simulink co-simulation results.

Źródło:

Bulletin of the Polish Academy of Sciences. Technical Sciences; 2021, 69, 3; e137065, 1--13
0239-7528

Pojawia się w:

Bulletin of the Polish Academy of Sciences. Technical Sciences

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 93.

Tytuł:

Nieliniowe sterowanie predykcyjne kaskadowym układem zbiorników
Nonlinear predictive control of a cascade of tanks

Autorzy:

Bieniek, B.
Piotrowski, R.

Powiązania:

https://bibliotekanauki.pl/articles/276826.pdf

Data publikacji:

2017

Wydawca:

Sieć Badawcza Łukasiewicz - Przemysłowy Instytut Automatyki i Pomiarów

Tematy:

kaskadowy układ zbiorników
modelowanie
sterowanie
nieliniowy układ regulacji
predykcyjny układ regulacji
cascade tanks
modeling
control
nonlinear control system
predictive control

Opis:

Obiektem regulacji jest kaskadowy układ trzech zbiorników firmy INTECO. Do sterowania wykorzystywane są dwa z nich. Zaprojektowano dwa układy regulacji poziomu wody: jednowymiarowe algorytmy MPC – po jednym dla każdego ze zbiorników oraz wielowymiarowy algorytm MPC sterujący całym układem. Przeprowadzono analizę porównawczą opracowanych algorytmów sterowania dla zmiennej trajektorii zadanej.
The control system is a cascade of three tanks of INTECO. They are used to control two of them. Two algorithms of water level control are used: two single dimensional model predictive control (MPC) algorithms, one for each tank, and a multi-dimensional MPC controlling both tanks simultaneously. A comparative analysis of developed control algorithms for variable set-point trajectory.

Źródło:

Pomiary Automatyka Robotyka; 2017, 21, 1; 25-30
1427-9126

Pojawia się w:

Pomiary Automatyka Robotyka

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 94.

Tytuł:

Nieliniowe sterowanie predykcyjne ramion manipulatorów
Nonlinear Predictive Control of Manipulator Arms

Autorzy:

Tatjewski, Piotr

Powiązania:

https://bibliotekanauki.pl/articles/27312429.pdf

Data publikacji:

2023

Wydawca:

Sieć Badawcza Łukasiewicz - Przemysłowy Instytut Automatyki i Pomiarów

Tematy:

sterowanie manipulatorów
sterowanie nieliniowe
sterowanie predykcyjne
opóźnienie sterowania
szybkie próbkowanie
manipulator control
nonlinear control
model predictive control
control delay
fast sampling

Opis:

Przedmiotem artykułu są algorytmy sterowania predykcyjnego (typu MPC - Model Predictive Control) ramion manipulatorów sztywnych. Zastosowano MPC z modelem w przestrzeni stanów i wykorzystano najnowszą technikę tłumienia zakłóceń i błędów modelowania, pozwalającą uniknąć dynamicznego modelowania zakłóceń lub uciekania się do dodatkowych technik ich eliminowania, takich jak SMC. Rozważane są przede wszystkim najbardziej efektywne obliczeniowo algorytmy MPC-NPL (NPL - Nonlinear Prediction and Linearization), w dwóch wersjach: z optymalizacją QP (Quadratic Programming) z ograniczeniami i z jawną optymalizacją bez ograniczeń i spełnieniem ograniczeń nierównościowych a posteriori. Dla wszystkich rozważanych algorytmów przeprowadzono kompleksową analizę symulacyjną sterowania manipulatorem z napędem bezpośrednim, przy dwóch rodzajach zakłócenia: zewnętrznym i parametrycznym. Wyniki porównano z uzyskanymi dla znanego algorytmu CTC-PID (CTC - Computer Torque Control), uzyskując lepszą jakość regulacji algorytmami MPC. Zbadano wpływ długości okresu próbkowania i obliczeniowego opóźnienia sterowania na jakość regulacji, co jest istotne dla algorytmów z szybkim próbkowaniem opartych na modelach.
The subject of the article are predictive control algorithms (of MPC type - Model Predictive Control) for rigid manipulator arms. MPC with a state-space model and with the latest disturbance and modeling error suppression technique was applied, which avoids dynamic disturbance modeling or resorting to additional disturbance cancellation techniques, such as SMC. First of all, the most computationally efficient MPC-NPL (Nonlinear Prediction and Linearization) algorithms are considered, in two versions: the first with constrained QP (Quadratic Programming) optimization and the second with explicit (analytical) optimization without constraints and satisfying a posteriori inequality constraints. For all considered algorithms, a comprehensive simulation analysis was carried out for a direct drive manipulator, with two kinds of disturbances: external and parametric. The obtained results were compared with those for the well-known CTC-PID algorithm (CTC - Computer Torque Control), showing better control quality with MPC algorithms. In addition, the influence of the length of the sampling period and of the computational delay on control quality was investigated, which is important for model-based algorithms with fast sampling.

Źródło:

Pomiary Automatyka Robotyka; 2023, 27, 2; 47--58
1427-9126

Pojawia się w:

Pomiary Automatyka Robotyka

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 95.

Tytuł:

Nieliniowy kaskadowy algorytm sterowania stężeniem tlenu w biologicznej oczyszczalni ścieków
A nonlinear cascade control algorithm for dissolved oxygen control at a biological wastewater plant

Autorzy:

Piotrowski, R.
Zawadzki, A.

Powiązania:

https://bibliotekanauki.pl/articles/157436.pdf

Data publikacji:

2014

Wydawca:

Stowarzyszenie Inżynierów i Techników Mechaników Polskich

Tematy:

modelowanie matematyczne
systemy dynamiczne
systemy nieliniowe
sterowanie kaskadowe
stężenie tlenu
napowietrzanie
biologiczna oczyszczalnia ścieków
mathematical modeling
dynamic systems
nonlinear systems
cascade control
dissolved oxygen
aeration
biological wastewater treatment

Opis:

Biologiczna oczyszczalnia ścieków jest złożonym nieliniowym systemem sterowania. Jednym z istotnych i kosztownych procesów tam zachodzących jest napowietrzanie ścieków. Prawidłowy jego przebieg ma decydujący wpływ na stopień oczyszczenia ścieków i koszty operacyjne pracy oczyszczalni. W związku z tym prowadzone są prace badawcze nad nowymi strukturami i algo-rytmami sterowania. Powinny się one odznaczać wysoką efektywnością i niewielkim zapotrzebowaniem na energię elektryczną. W artykule zaprojektowano kaskadowy układ sterowania stężeniem tlenu uwzględniający instalację napowietrzającą jako system dostarczający powietrze do oczyszczalni ścieków. W badaniach symulacyjnych przedstawiono wyniki sterowania dla biologicznej oczyszczalni ścieków w Nowym Dworze Gdańskim.
A biological wastewater treatment plant is a complex, nonlinear control system. Aeration is one of the most important and expensive processes conducted in it. Its valid flow has a deciding impact on the level of wastewater purification. Therefore a number of research are carried out to develop new control structures and algorithms. They should be characterized by high efficiency and low energy consumption. In the paper a novel cascade control strategy of dissolved oxygen is employed. It considers the aeration system as a source of the oxygen to the plant. Simulation tests present control results for the case study of the wastewater treatment plant located at Nowy Dwór Gdański. The paper is divided into 4 sections. Section 1 contains a short introduction to the main issues of research. The structure and models of the wastewater treatment plant at Nowy Dwor Gdanski and the aeration system are described in Section 2. Section 3 presents a nonlinear cascade control algorithm. The simulation results and analysis are described in Section 4. Section 5 concludes the paper.

Źródło:

Pomiary Automatyka Kontrola; 2014, R. 60, nr 1, 1; 20-25
0032-4140

Pojawia się w:

Pomiary Automatyka Kontrola

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 96.

Tytuł:

Nieliniowy regulator predykcyjny w sterowaniu instalacją napowietrzającą
Nonlinear model predictive controller for aeration system control

Autorzy:

Piotrowski, R.
Mojsiewicz, A.

Powiązania:

https://bibliotekanauki.pl/articles/157322.pdf

Data publikacji:

2011

Wydawca:

Stowarzyszenie Inżynierów i Techników Mechaników Polskich

Tematy:

modelowanie matematyczne
systemy dynamiczne
systemy nieliniowe
sterowanie predykcyjne
napowietrzanie
biologiczna oczyszczalnia ścieków
mathematical modelling
dynamic systems
nonlinear systems
predictive control
aeration
biological wastewater treatment

Opis:

Napowietrzanie ścieków to jeden z najważniejszych i najdroższych procesów biologicznego oczyszczania ścieków. Wzrost wymagań związanych ze stopniem oczyszczenia ścieków wymusza poszukiwanie nowych rozwiązań w zakresie technologii oraz w sterowaniu tymi procesami. W artykule zbudowano dynamiczny model instalacji napowietrzającej, a następnie zaprezentowano nowy sposób sterowania tym obiektem. Jako metodę wybrano technologię sterowania predykcyjnego. W badaniach symulacyjnych przedstawiono wyniki sterowania instalacją pracującą w oczyszczalni ścieków w Nowym Dworze Gdańskim.
Aeration is an important and expensive activity that is carried out during wastewater treatment plant operation. New environmental policies and regulations enforce more efficient operation of the wastewater treatment plant. Aeration is used in different kind of plant operations. Biological processes carried out in wastewater treatment plant require the dissolved oxygen concentration to have sufficiently high level to maintain microorganisms in activated sludge. The paper presents design, implementation and simulation of a novel type of nonlinear model predictive controller for aeration system tracking in a wastewater treatment plant. The controller is applied to the wastewater treatment plant in Nowy Dwor Gdanski. The paper is divided into 6 sections. Section 1 contains a short introduction to the issues of this paper. The structure of the wastewater treatment plant in Nowy Dwor Gdanski and the aeration system are described in Section 2. Section 3 presents synthesis of the dynamical nonlinear model of the aeration system. A nonlinear model predictive controller is derived in Section 4. Simulation tests and discussion of the obtained results are described in Section 5. Section 6 concludes the paper.

Źródło:

Pomiary Automatyka Kontrola; 2011, R. 57, nr 3, 3; 253-256
0032-4140

Pojawia się w:

Pomiary Automatyka Kontrola

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 97.

Tytuł:

Noise sensitivity of selected kinematic path following controllers for a unicycle

Autorzy:

Libal, U.
Płaskonka, J.

Powiązania:

https://bibliotekanauki.pl/articles/200552.pdf

Data publikacji:

2014

Wydawca:

Polska Akademia Nauk. Czytelnia Czasopism PAN

Tematy:

wheeled mobile robots
path following
Serret-Frenet frame
model-based control
nonlinear control systems
nonholonomic constraints
probabilistic robotics

Opis:

In the paper a path following problem for a wheeled mobile robot of (2,0) type has been considered. The kinematic model of the robot was derived with respect to the Serret-Frenet frame. Two kinematic control algorithms - Samson and Morin-Samson - have been tested taking into account their sensitivity to a white noise with a zero mean appearing in the one of state variables. The properties of path following errors have been analysed using statistical techniques. The conclusions related to an acceptable level of noise and a range of applicability of the presented algorithms have been reached.

Źródło:

Bulletin of the Polish Academy of Sciences. Technical Sciences; 2014, 62, 1; 3-13
0239-7528

Pojawia się w:

Bulletin of the Polish Academy of Sciences. Technical Sciences

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 98.

Tytuł:

Non-Certainty-Equivalent Adaptive Control of a Nonlinear Aeroelastic System

Autorzy:

Lee, K. W.
Singh, S. N.

Powiązania:

https://bibliotekanauki.pl/articles/226734.pdf

Data publikacji:

2010

Wydawca:

Polska Akademia Nauk. Czytelnia Czasopism PAN

Tematy:

aeroelastic wing
adaptive flutter control
nonlinear system
immersion and invariance method
uncertain system

Opis:

The development of a non-certainty-equivalent adaptive control system for the control of a nonlinear aeroelastic system is the subject of this paper. The prototypical aeroelastic wing section considered here includes structural nonlinearity and a single control surface for the purpose of control. Its dynamical model has two-degree-of-freedom and describes the plunge and pitch motion. It is assumed that the model parameters (except the sign of one of the control input coefficients) are not known. The uncontrolled aeroelastic model exhibits limit cycle oscillation beyond a critical free-stream velocity. Based on the attractive manifold, and the immersion and invariance methodologies, a non-certainty-equivalent adaptive state variable feedback control law for the trajectory tracking of the pitch angle is derived. Using the Lyapunov analysis, asymptotic convergence of the state variables to the origin is established. It is shown that the trajectory of the system converges to a manifold. The special feature of the designed control system is that the closed-loop system asymptotically recovers the performance of a deterministic controller. This cannot happen if certainty-equivalent adaptive controllers are used. Simulation results are presented which show that the control system suppresses the oscillatory responses of the system in the presence of large parameter uncertainties.

Źródło:

International Journal of Electronics and Telecommunications; 2010, 56, 4; 463-471
2300-1933

Pojawia się w:

International Journal of Electronics and Telecommunications

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 99.

Tytuł:

Nonlinear boundary control of coupled Burgers equations

Autorzy:

Kobayashi, T.
Oya, M.

Powiązania:

https://bibliotekanauki.pl/articles/206228.pdf

Data publikacji:

2003

Wydawca:

Polska Akademia Nauk. Instytut Badań Systemowych PAN

Tematy:

równanie sprzężone Burgersów
stabilizacja globalna
regulacja adaptacyjna
sterowanie nieliniowe brzegowe
coupled Burgers' equation
global stabilization
adaptive regulation
nonlinear boundary control

Opis:

This paper is concerned with adaptive stabilization of two coupled viscous Burgers' equations by nonlinear boundary controllers. Under the existence of bounded deterministic disturbances, the adaptive controllers are constructed by the concept of high-gain nonlinear output feedback and the estimation mechanism of the unknown parameters. In the controlled system the global stability and the convergence of the system states to zero will be guaranteed. It is shown that the theory can be generalized to the systems with higher-order nonlinearity.

Źródło:

Control and Cybernetics; 2003, 32, 2; 245-258
0324-8569

Pojawia się w:

Control and Cybernetics

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 100.

Tytuł:

Nonlinear control for a diesel engine: A CLF-based approach

Autorzy:

Kuzmych, O.
Aitouche, A.
El-Hajjaji, A.
Bosche, J.

Powiązania:

https://bibliotekanauki.pl/articles/331262.pdf

Data publikacji:

2014

Wydawca:

Uniwersytet Zielonogórski. Oficyna Wydawnicza

Tematy:

turbocharged diesel engine
control Lyapunov function
nonlinear control design
stability analysis
diesel virtual test bench
silnik wysokoprężny
turbodoładowanie
funkcja Lapunowa
sterowanie nieliniowe
analiza stabilności
stanowisko badawcze

Opis:

In this paper, we propose a control Lyapunov function based on a nonlinear controller for a turbocharged diesel engine. A model-based approach is used which predicts the experimentally observed engine performance for a biodiesel. The basic idea is to develop an inverse optimal control and to employ a Lyapunov function in order to achieve good performances. The obtained controller gain guarantees the global convergence of the system and regulates the flows for the variable geometry turbocharger as well as exhaust gas recirculation systems in order to minimize the NO_x emission and the smoke of a biodiesel engine. Simulation of the control performances based on professional software and experimental results show the effectiveness of this approach.

Źródło:

International Journal of Applied Mathematics and Computer Science; 2014, 24, 4; 821-835
1641-876X
2083-8492

Pojawia się w:

International Journal of Applied Mathematics and Computer Science

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce