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Wyszukujesz frazę "feedback control" wg kryterium: Temat


Tytuł:
On suppression of chaotic motions of a portal frame structure under non-ideal loading using a magneto-rheological damper
Autorzy:
Tusset, A. M.
Piccirillo, V.
Balthazar, J. M.
Brasil, R. M. L. R. F.
Powiązania:
https://bibliotekanauki.pl/articles/281951.pdf
Data publikacji:
2015
Wydawca:
Polskie Towarzystwo Mechaniki Teoretycznej i Stosowanej
Tematy:
feedback control
feedforward control
MR damper
Opis:
We consider chaotic motions of a portal frame structure under non-ideal loading. To suppress this chaotic behavior, a controlling scheme is implemented. The control strategy involves application of two control signals and nonlinear feedforward control to maintain a desired periodic orbit, and state feedback control to bring the system trajectory into the desired periodic orbit. Additionally, the control strategy includes an active magneto-rheological damper to actuate the system. The control force of the damper is a function of the voltage applied in the coil of the damper that is based on the force given by the controller.
Źródło:
Journal of Theoretical and Applied Mechanics; 2015, 53, 3; 653-664
1429-2955
Pojawia się w:
Journal of Theoretical and Applied Mechanics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
On dynamical identification of control in a system with time delay
Autorzy:
Maksimov, V.
Powiązania:
https://bibliotekanauki.pl/articles/229779.pdf
Data publikacji:
2012
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
time-delay system
identification
feedback control
Opis:
The problem of identification of a control through results of observations of phase states of dynamical systems described by differential equations with time delay is discussed. The paper presents an algorithm based on the method of feedback control with a model. The algorithm is stable with respect to informational noises and computational errors.
Źródło:
Archives of Control Sciences; 2012, 22, 1; 5-15
1230-2384
Pojawia się w:
Archives of Control Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
TM-AFM nonlinear motion control with robustness analysis to parametric errors in the control signal determination
Autorzy:
Balthazar, J. M.
Tusset, A. M.
Bueno, Á. M.
Powiązania:
https://bibliotekanauki.pl/articles/281314.pdf
Data publikacji:
2014
Wydawca:
Polskie Towarzystwo Mechaniki Teoretycznej i Stosowanej
Tematy:
AFM
SDRE control
optimal linear feedback control
uncertainty
Opis:
Nonlinear motion of the microcantilever probe in the Atomic Force Microscope (AFM) has been extensively studied considering mainly the van der Waals forces. Since the behavior of the microcantilever is vital to quality of generated images, the study of control strategies that force the probe to avoid undesired behavior such as chaotic motion, is also of significant importance. A number of published works has shown that the microcantilever is subject to chaotic motion for a certain combination of parameters. For such a parameter combination, the control system must suppress the chaotic motion. Here, an study of the AFM mathematical model is presented, aiming to find a region of operation of the AFM where the motion is chaotic. In order to suppress the chaotic motion, a periodic orbit of the system is obtained, and the controller forces the system to that periodic orbit. Two control strategies are used, namely: The State Dependent Riccati Equation (SDRE) and the Optimal Linear Feedback Control (OLFC). Both control strategies consider the complete nonlinearities of the system, and the OLFC guarantees the global stability. The numerical simulations carried out showed the efficiency of the control methods as well as the sensitivity of each control strategy to parametric errors. Without the parametric errors, both control strategies were effective in maintaining the system into the desired orbit. On the other hand, in the presence of parametric errors, the SDRE technique was more robust than the OLFC.
Źródło:
Journal of Theoretical and Applied Mechanics; 2014, 52, 1; 93-106
1429-2955
Pojawia się w:
Journal of Theoretical and Applied Mechanics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
An Adaptive Control Strategy for a Low-Ripple Boost Converter in BLDC Motor Speed Control
Autorzy:
Wang, Haifeng
Zhang, Haili
Powiązania:
https://bibliotekanauki.pl/articles/1955989.pdf
Data publikacji:
2021
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
boost converter
BLDC
harmonics
observer
feedback control
Opis:
Conventional boost converters are widely used for connecting low-voltage power sources and inverters in motor control. However, a large filter capacitor bank is often used to reduce DC-link ripples that occur when an inverter is connected to a boost converter. Otherwise, significant voltage and current perturbations can impact on battery performance degradation and cause torque ripple, speed ripple and vibration in brushless DC (BLDC) motors. To suppress the converter’s DC-link ripple, this paper proposes a new control strategy for boost converter controller to generate low-ripple DC-link voltage or current at different motor speeds. In the proposed method, observers are designed to adaptively estimate the DC-link voltage and current harmonics. The harmonic terms are used as feedback signals to calculate the DC converter’s duty cycle. The entire control model is implemented on an embedded system, and its robustness is verified by simulation and experimental results that show the DC-link voltage and current ripples can be reduced by about 50% and 30%, respectively.
Źródło:
Power Electronics and Drives; 2021, 6, 41; 242-259
2451-0262
2543-4292
Pojawia się w:
Power Electronics and Drives
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Remarks on the steady-state accuracy of a feedback control system
Autorzy:
Ferrante, A.
Krajewski, W.
Lepschy, A.
Viaro, U.
Powiązania:
https://bibliotekanauki.pl/articles/205550.pdf
Data publikacji:
2000
Wydawca:
Polska Akademia Nauk. Instytut Badań Systemowych PAN
Tematy:
feedback control systems
robustness
steady-state response
Opis:
The paper deals with the steady-state response of a feedback control system to the canonical inputs. For its characterization it seems useful to introduce the notion of accuracy index mi beside the standard notion of loop type v. This index is assumed to be equal to the power of t in the analytic expression of the canonical input that leads to a finite nonzero deviation between the actual and the desired responses. When applied in the control design procedure, the accuracy index mi allows to achieve a steady-state performance that is more satisfactory than the one obtainable with reference to the loop type only. The conditions under which a single-loop feedback control system exhibits a prescribed value of mi, given the value of v, are derived and discussed with particular regard to their robustness.
Źródło:
Control and Cybernetics; 2000, 29, 1; 51-67
0324-8569
Pojawia się w:
Control and Cybernetics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Optimal feedback control proportional to the system state can be found for non-causal descriptor systems (a remark on a paper by P. C. Müller)
Autorzy:
Kurina, G. K.
Powiązania:
https://bibliotekanauki.pl/articles/908507.pdf
Data publikacji:
2002
Wydawca:
Uniwersytet Zielonogórski. Oficyna Wydawnicza
Tematy:
automatyka
optimal feedback control
non-causal descriptor systems
Opis:
Optimal feedback control depending only on the system state is constructed for a control problem by the non-causal descriptor system for which optimal feedback control depending on state derivatives was considered in the paper (Müller, 1998). To this end, a non-symmetric solution of the algebraic operator Riccati equation is used.
Źródło:
International Journal of Applied Mathematics and Computer Science; 2002, 12, 4; 591-593
1641-876X
2083-8492
Pojawia się w:
International Journal of Applied Mathematics and Computer Science
Dostawca treści:
Biblioteka Nauki
Artykuł
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
Artykuł
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
Artykuł
Tytuł:
PMSM servo-drive fed by SiC MOSFETs based VSI
Autorzy:
Tarczewski, T.
Skiwski, M.
Grzesiak, L. M.
Zieliński, M.
Powiązania:
https://bibliotekanauki.pl/articles/1193673.pdf
Data publikacji:
2018
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
PMSM
servo-drive
SiC MOSFET
FOC control
state feedback control
Opis:
The article presents modern PMSM servo-drive with SiC MOSFETs power devices and microprocessor with ARM Cortex core. The high switching frequency is obtained due to the application of high efficient power switching components and powerful microprocessor. It allows to achieve good dynamical properties of current control loop, proper disturbance compensation and silent operation of servo-drive. Experimental tests results obtained for two different control schemes (i.e., cascade control structure and state feedback position control) are presented.
Źródło:
Power Electronics and Drives; 2018, 3, 38; 35-45
2451-0262
2543-4292
Pojawia się w:
Power Electronics and Drives
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Optimal control of ∞-dimensional stochastic systems via generalized solutions of HJB equations
Autorzy:
Ahmed, N.
Powiązania:
https://bibliotekanauki.pl/articles/729348.pdf
Data publikacji:
2001
Wydawca:
Uniwersytet Zielonogórski. Wydział Matematyki, Informatyki i Ekonometrii
Tematy:
optimal control
stochastic systems
infinite dimension
HJB equation
stationary feedback control
Opis:
In this paper, we consider optimal feedback control for stochastc infinite dimensional systems. We present some new results on the solution of associated HJB equations in infinite dimensional Hilbert spaces. In the process, we have also developed some new mathematical tools involving distributions on Hilbert spaces which may have many other interesting applications in other fields. We conclude with an application to optimal stationary feedback control.
Źródło:
Discussiones Mathematicae, Differential Inclusions, Control and Optimization; 2001, 21, 1; 97-126
1509-9407
Pojawia się w:
Discussiones Mathematicae, Differential Inclusions, Control and Optimization
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
An information based approach to stochastic control problems
Autorzy:
Bania, Piotr
Powiązania:
https://bibliotekanauki.pl/articles/330505.pdf
Data publikacji:
2020
Wydawca:
Uniwersytet Zielonogórski. Oficyna Wydawnicza
Tematy:
stochastic control
feedback control
information
entropy
sterowanie stochastyczne
sprzężenie zwrotne
entropia
Opis:
An information based method for solving stochastic control problems with partial observation is proposed. First, information-theoretic lower bounds of the cost function are analysed. It is shown, under rather weak assumptions, that reduction in the expected cost with closed-loop control compared with the best open-loop strategy is upper bounded by a non-decreasing function of mutual information between control variables and the state trajectory. On the basis of this result, an information based control (IBC) method is developed. The main idea of IBC consists in replacing the original control task by a sequence of control problems that are relatively easy to solve and such that information about the system state is actively generated. Two examples of the IBC operation are given. It is shown that the method is able to find an optimal solution without using dynamic programming at least in these examples. Hence the computational complexity of IBC is substantially smaller than that of dynamic programming, which is the main advantage of the proposed method.
Źródło:
International Journal of Applied Mathematics and Computer Science; 2020, 30, 1; 23-34
1641-876X
2083-8492
Pojawia się w:
International Journal of Applied Mathematics and Computer Science
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Optimal control problems with a fixed terminal time in linear fractional-order systems
Autorzy:
Gomoyunov, M. I.
Powiązania:
https://bibliotekanauki.pl/articles/1403685.pdf
Data publikacji:
2020
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
optimal control
fractional derivatives
linear systems
open-loop control
feedback control
reduction
Opis:
The paper deals with an optimal control problem in a dynamical system described by a linear differential equation with the Caputo fractional derivative. The goal of control is to minimize a Bolza-type cost functional, which consists of two terms: the first one evaluates the state of the system at a fixed terminal time, and the second one is an integral evaluation of the control on the whole time interval. In order to solve this problem, we propose to reduce it to some auxiliary optimal control problem in a dynamical system described by a first-order ordinary differential equation. The reduction is based on the representation formula for solutions to linear fractional differential equations and is performed by some linear transformation, which is called the informational image of a position of the original system and can be treated as a special prediction of a motion of this system at the terminal time. A connection between the original and auxiliary problems is established for both open-loop and feedback (closed-loop) controls. The results obtained in the paper are illustrated by examples.
Źródło:
Archives of Control Sciences; 2020, 30, 4; 721-744
1230-2384
Pojawia się w:
Archives of Control Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Model układu sterowania ze sprzężeniem zwrotnym (człowiek-agregat rolniczy) w aspekcie bezpieczeństwa ruchu
Modeling of the feedback control systems (driver-agricultural set) in aspect of movement safety
Autorzy:
Kromulski, J.
Szczepaniak, J.
Pawłowski, T.
Powiązania:
https://bibliotekanauki.pl/articles/336203.pdf
Data publikacji:
2011
Wydawca:
Sieć Badawcza Łukasiewicz - Przemysłowy Instytut Maszyn Rolniczych
Tematy:
układ sterowania
sprzężenie zwrotne
bezpieczeństwo
modeling
feedback control systems
safety
Opis:
Przedstawiono model sterowania rolniczym agregatem, składającym się z pojazdu i połączonej z nim maszyny rolniczej. Sterowany przez kierowcę agregat jest rozpatrywany jako system regulacji, w którym kierowca jest regulatorem, a maszyna rolnicza obiektem regulowanym. Układ sterujący odwzorowuje zachowanie kierowcy, z jego ograniczonymi możliwościami percepcji, opóźnieniami reakcji itp. Bezpośrednie uwzględnienie wszystkich parametrów, opisujących takie zachowania kierowcy nie byłoby możliwe. Zdecydowano się zatem na zastosowanie metody opisującej zachowania agregatu metodami stochastycznymi, za pomocą transmitancji operatorowych w dziedzinie częstotliwości oraz korelacji w dziedzinie czasu.
A control model of the agricultural machinery unit consisting of vehicle and agricultural machine has been presented. Vehicle driven by operator is being considered as control system with driver as a controller and vehicle as controlled system. Presented control system reproduces the actual behavior of the driver with its limited possibilities of perception, response time, delays, etc. Taking into account all the parameters describing such a behavior of the driver would not be possible. Therefore, it was decided to apply the method of describing the aggregate behavior by the use of the operational transmittance in the frequency domain and correlation in the time domain. The control model has been constructed with the use of stochastic methods and operational transmittances describing the various components of the system.
Źródło:
Journal of Research and Applications in Agricultural Engineering; 2011, 56, 2; 101-104
1642-686X
2719-423X
Pojawia się w:
Journal of Research and Applications in Agricultural Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Experimental characterization of hybrid noise control systeme acting in acoustic duct
Eksperymentalna charakterystyka hybrydowego układu redukcji hałasu działającego w akustycznym dukcie
Autorzy:
Tiseo, B.
Concilio, A.
Ameduri, S.
Gianvito, A.
Powiązania:
https://bibliotekanauki.pl/articles/280885.pdf
Data publikacji:
2011
Wydawca:
Polskie Towarzystwo Mechaniki Teoretycznej i Stosowanej
Tematy:
sound absorbing material
acoustic duct
foam
active surface
feedback control
Opis:
In this investigation, a sound absorbing material is coupled with an active surface to reduce sound pressure within an acoustic duct. In this way, an enhancement of the passive foam performance can be observed because of further acceleration of the fluid particles within the foam pores. The experimental activity implements noise control strategies to increase damping within the cavity through acoustic foam with a flexible backing plate, acted by piezoelectric actuators.
W pracy zbadano skuteczność zastosowania materiału absorbującego dźwięk współpracującego z aktywną powierzchnią przeznaczoną do redukcji ciśnienia akustycznego w dukcie. Zaobserwowano, że takie skojarzenie znacznie poprawia pasywne właściwości samej dźwiękochłonnej pianki wskutek zwiększenia przyspieszeń cząstek płynu zawartego w porach pianki.Wwyniku badań doświadczalnych uzyskano strategie kontroli hałasu zwiększające tłumienie poprzez użycie akustycznej pianki na elastycznej płycie domykającej dukt i sterowanej elementami piezoelektrycznymi.
Źródło:
Journal of Theoretical and Applied Mechanics; 2011, 49, 2; 313-326
1429-2955
Pojawia się w:
Journal of Theoretical and Applied Mechanics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Stabilizacja systemów sterowanych
Stabilization of control systems
Autorzy:
Mitkowski, W.
Powiązania:
https://bibliotekanauki.pl/articles/274648.pdf
Data publikacji:
2011
Wydawca:
Sieć Badawcza Łukasiewicz - Przemysłowy Instytut Automatyki i Pomiarów
Tematy:
stabilizacja
sprzężenie zwrotne
systemy dynamiczne
stabilization
feedback control
dynamical systems
Opis:
W pracy przedstawiono kilka uwag na temat stabilizacji sterowanych układów dynamicznych. Wskazano różne obszary zastosowań praktycznych.
The paper contains a remarks of the methods of stabilization of control systems. Examples of applications are presented.
Źródło:
Pomiary Automatyka Robotyka; 2011, 15, 12; 46-47
1427-9126
Pojawia się w:
Pomiary Automatyka Robotyka
Dostawca treści:
Biblioteka Nauki
Artykuł

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