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Wyszukujesz frazę "control systems" wg kryterium: Temat


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
Artykuł
Tytuł:
An iterative method for time optimal control of dynamic systems
Autorzy:
Kashiri, N.
Ghasemi, M. H.
Dardel, M.
Powiązania:
https://bibliotekanauki.pl/articles/229435.pdf
Data publikacji:
2011
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
dynamic systems
optimal control
time optimal control
bounded control inputs
Opis:
An iterative method for time optimal control of a general type of dynamic systems is proposed, subject to limited control inputs. This method uses the indirect solution of open-loop optimal control problem. The necessary conditions for optimality are derived from Pontryagin's minimum principle and the obtained equations lead to a nonlinear two point boundary value problem (TPBVP). Since there are many difficulties in finding the switching points and in solving the resulted TPBVP, a simple iterative method based on solving the minimum energy solution is proposed. The method does not need finding the switching point so that the resulted TPBVP can be solved by usual algorithms such as shooting and collocation. Also, since the solution of TPBVPs is sensitive to initial guess, a short procedure for making the proper initial guess is introduced. To this end, the accuracy and efficiency of the proposed method is demonstrated using time optimal solution of some systems: harmonic oscillator, robotic arm, double spring-mass problem with coulomb friction and F-8 aircraft.
Źródło:
Archives of Control Sciences; 2011, 21, 1; 5-23
1230-2384
Pojawia się w:
Archives of Control Sciences
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:
Optimizing the Linear Quadratic Minimum-Time Problem for Discrete Distributed Systems
Autorzy:
Rachik, M.
Abdelhak, A.
Powiązania:
https://bibliotekanauki.pl/articles/907998.pdf
Data publikacji:
2002
Wydawca:
Uniwersytet Zielonogórski. Oficyna Wydawnicza
Tematy:
informatyka
discrete distributed systems
time-delay systems
minimum time
optimal control
Opis:
With reference to the work of Verriest and Lewis (1991) on continuous finite-dimensional systems, the linear quadratic minimum-time problem is considered for discrete distributed systems and discrete distributed time delay systems. We treat the problem in two variants, with fixed and free end points. We consider a cost functional J which includes time, energy and precision terms, and then we investigate the optimal pair (N,u) which minimizes J.
Źródło:
International Journal of Applied Mathematics and Computer Science; 2002, 12, 2; 153-160
1641-876X
2083-8492
Pojawia się w:
International Journal of Applied Mathematics and Computer Science
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
On a degenerate Riccati equation
Autorzy:
Kesavan, S.
Raymond, J. P.
Powiązania:
https://bibliotekanauki.pl/articles/970756.pdf
Data publikacji:
2009
Wydawca:
Polska Akademia Nauk. Instytut Badań Systemowych PAN
Tematy:
algebraic Riccati equation
optimal control
parabolic systems
Opis:
In this paper, we study the existence of solutions to a degenerate algebraic Riccati equation associated to an optimal control problem with infinite time horizon. Under some assumptions on the control system, we can select a solution to this Riccati equation providing a feedback control law able to stabilize the system.
Źródło:
Control and Cybernetics; 2009, 38, 4B; 1393-1410
0324-8569
Pojawia się w:
Control and Cybernetics
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:
Modelling and control of mechatronic systems by the descriptor approach
Modelowanie i sterowanie układów mechatronicznych metodą deskrypcyjną
Autorzy:
Muller, P. C.
Powiązania:
https://bibliotekanauki.pl/articles/280382.pdf
Data publikacji:
2005
Wydawca:
Polskie Towarzystwo Mechaniki Teoretycznej i Stosowanej
Tematy:
układy mechatroniczne
układy deskrypcyjne
optymalna kontrola
descriptor systems
mechatronic systems
optimal control
Opis:
In recent years, the analysis and synthesis of control systems in a descriptor form has been established. The general description of dynamical systems by differential-algebraic equations (DAE) is important for many applications in various disciplines, but particularly in mechatronics. In this contribution, the pros and cons of the modelling of mechatronic systems by differential-algebraic equations are discussed with application of subsystem modelling. Additionally, the actual state of the art simulation, analysis and design of descriptor systems are presented.
W ostatnich latach sformułowano i spopularyzowano problem analizy i syntezy układów sterujących w postaci deskrypcyjnej. Ogólny opis układów dynamicznych za pomocą równań różniczkowo-algebraicznych (DAE) ma ogromne znaczenie aplikacyjne w różnych dziedzinach nauki, w szczególności w zakresie mechatroniki. W prezentowanej pracy przedyskutowano wszystkie "za" i "przeciw" modelowania układów mechatronicznych równaniami różniczkowo-algebraicznymi z zastosowaniem podziału opisywanego układu na podsystemy. Ponadto przedstawiono najnowocześniejsze metody symulacji, analizy i projektowania układów deskrypcyjnych.
Źródło:
Journal of Theoretical and Applied Mechanics; 2005, 43, 3; 593-607
1429-2955
Pojawia się w:
Journal of Theoretical and Applied Mechanics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Iteracyjny algorytm wyznaczania sterowania optymalnego dla systemów dynamicznych
Numerical calculation of optimal control for dynamic systems
Autorzy:
Rudzińska, K.
Kormański, H.
Powiązania:
https://bibliotekanauki.pl/articles/153652.pdf
Data publikacji:
2008
Wydawca:
Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:
sterowanie optymalne
systemy dynamiczne
optimal control
dynamic systems
Opis:
Artykuł prezentuje iteracyjną metodę wyznaczania sterowania optymalnego dla systemów dynamicznych ciągłych i dyskretnych w czasie. Celem sterowania jest minimalizacja funkcjonału kosztu (wskaźnika jakości) przy narzuconych ograniczeniach w postaci równań różniczkowych lub różnicowych, warunków brzegowych oraz algebraicznych zależności w postaci równań lub nierówności wiążących ze sobą optymalne funkcje sterujące u(t) i funkcje wektora stanu x(t). W pracy zaproponowano iteracyjną metodę obliczeniową opartą na parametryzacji funkcji sterujących na bazie funkcji sklejanych, wprowadzeniu przesuwnego funkcjonału kary do wskaźnika jakości oraz wyznaczaniu kolejnego przybliżenia funkcji sterujących w oparciu o gradientowe algorytmy kierunków sprzężonych. Metodę zilustrowano dwoma przykładami z dziedziny transportu dotyczących sterowania autobusem miejskim między przystankami i stawiających za cel poprawienie płynności jazdy (komfortu pasażera) lub minimalizację zużycia paliwa.
The paper presents a sequential method of optimal control calculation for continuous and discrete time dynamic systems. The aim of the procedure is minimization of a cost functional (performance index). Control functions are subject to constraints defined by set of differential (or difference) equations, initial conditions and set of algebraic equalities and/or inequalities describing relationships among control and state variables. The method described is based on control parameterization by spline function approximation, consideration algebraic constraints by addition the shifted penalty functional to the performance index as well as application of nonlinear programming algorithms to the process of solution improving. The gradient procedures based on conjugate directions turned out especially effective. The method was illustrated by two practical problems from urban transport domain. The purpose of the optimization was to improve passenger comfort and to minimize bus fuel consumption.
Źródło:
Pomiary Automatyka Kontrola; 2008, R. 54, nr 3, 3; 161-165
0032-4140
Pojawia się w:
Pomiary Automatyka Kontrola
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
On the minimum energy compensation for linear time-varying disturbed systems
Autorzy:
Magri, El Mostafa
Amissi, Chadi
Afifi, Larbi
Lhous, Mustapha
Powiązania:
https://bibliotekanauki.pl/articles/2175118.pdf
Data publikacji:
2022
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
dynamical systems
remediability
observation
optimal control
disturbance
Opis:
We consider in this work a class of finite dimensional time-varying linear disturbed systems. The main objective of this work is to studied the optimal control which ensures the remediability of a disturbance of time-varying disturbed systems. The remediability concept consist to find a convenient control which bringing back the corresponding observation of disturbed system to the normal one at the final time. We give firstly some characterisations of compensation and in second party we find a control which annul the output of the system and we show also that the Hilbert Uniqueness Method can be used to solve the optimal control which ensure the remediability. A general approach was given to minimize the linear quadratic problem. Examples and numerical simulations are given.
Źródło:
Archives of Control Sciences; 2022, 32, 4; 733--754
1230-2384
Pojawia się w:
Archives of Control Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Fixed final time and free final state optimal control problem for fractional dynamic systems – linear quadratic discrete-time case
Autorzy:
Dzieliński, A.
Czyronis, P. M.
Powiązania:
https://bibliotekanauki.pl/articles/201358.pdf
Data publikacji:
2013
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
fractional order systems
discrete-time systems
optimal control
linear quadratic performance index
Opis:
The optimization problem for fractional discrete-time systems with a quadratic performance index has been formulated and solved. The case of fixed final time and a free final state has been considered. A method for numerical computation of optimization problems has been presented. The presented method is a generalization of the well-known method for discrete-time systems of integer order. The efficiency of the method has been demonstrated on numerical examples and illustrated by graphs. Graphs also show the differences between the fractional and classical (standard) systems theory. Results for other cases of the fractional system order (coefficient ) and not illustrated with numerical examples have been obtained through a computer algorithm written for this purpose.
Źródło:
Bulletin of the Polish Academy of Sciences. Technical Sciences; 2013, 61, 3; 681-690
0239-7528
Pojawia się w:
Bulletin of the Polish Academy of Sciences. Technical Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Output tracking control of an aircraft subject to additive state dependent disturbance: an optimal control approach
Autorzy:
Tanyer, Ilker
Tatlicioglu, Enver
Zergeroglu, Erkan
Powiązania:
https://bibliotekanauki.pl/articles/1409414.pdf
Data publikacji:
2021
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
optimal control
aerospace applications
nonlinear systems
mechanical applications
mechatronics applications
robust control
Opis:
In this paper, model reference output feedback tracking control of an aircraft subject to additive, uncertain, nonlinear disturbances is considered. In order to present the design steps in a clear fashion: first, the aircraft dynamics is temporarily assumed as known with all the states of the system available. Then a feedback linearizing controller minimizing a performance index while only requiring the output measurements of the system is proposed. As the aircraft dynamics is uncertain and only the output is available, the proposed controller makes use of a novel uncertainty estimator. The stability of the closed loop system and global asymptotic tracking of the proposed method are ensured via Lyapunov based arguments, asymptotic convergence of the controller to an optimal controller is also established. Numerical simulations are presented in order to demonstrate the feasibility and performance of the proposed control strategy.
Źródło:
Archives of Control Sciences; 2021, 31, 2; 267-286
1230-2384
Pojawia się w:
Archives of Control Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Time-domain decomposition for optimal control problems governed by semilinear hyperbolic systems with mixed two-point boundary conditions
Autorzy:
Krug, Richard
Leugering, Günter
Martin, Alexander
Schmidt, Martin
Weninger, Dieter
Powiązania:
https://bibliotekanauki.pl/articles/2183473.pdf
Data publikacji:
2021
Wydawca:
Polska Akademia Nauk. Instytut Badań Systemowych PAN
Tematy:
time-domain decomposition
optimal control
semilinear hyperbolic systems
convergence
Opis:
In this article, we study the time-domain decomposition of optimal control problems for systems of semilinear hyperbolic equations and provide an in-depth well-posedness analysis. This is a continuation of our work, Krug et al. (2021) in that we now consider mixed two-point boundary value problems. The more general boundary conditions significantly enlarge the scope of applications, e.g., to hyperbolic problems on metric graphs with cycles. We design an iterative method based on the optimality systems that can be interpreted as a decomposition method for the original optimal control problem into virtual control problems on smaller time domains.
Źródło:
Control and Cybernetics; 2021, 50, 4; 427--455
0324-8569
Pojawia się w:
Control and Cybernetics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Optimal digital control of an uncertain parameter 2nd order plant
Autorzy:
Oprzędkiewicz, K.
Powiązania:
https://bibliotekanauki.pl/articles/93136.pdf
Data publikacji:
2018
Wydawca:
Państwowa Wyższa Szkoła Zawodowa w Tarnowie
Tematy:
digital control
optimal control
uncertain parameter systems
sterowanie cyfrowe
optymalna kontrola
system parametrów niepewnych
Opis:
In the paper a construction of a control system for 2nd order, uncertain-parameter plant is discussed. The considered model of the plant is described by state space equation or by equivalent transfer function and it describes a huge class of real control plants, for example – electric drives or oriented PV systems. As a controller the digital proportional (P) controller was employed. The control system is going to be implemented at the microcontroller platform. Results are by the example depicted.
Źródło:
Science, Technology and Innovation; 2018, 2, 1; 59-63
2544-9125
Pojawia się w:
Science, Technology and Innovation
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
On the discrete time-varying JLQG problem
Autorzy:
Czornik, A.
Świerniak, A.
Powiązania:
https://bibliotekanauki.pl/articles/907993.pdf
Data publikacji:
2002
Wydawca:
Uniwersytet Zielonogórski. Oficyna Wydawnicza
Tematy:
automatyka
robotyka
jump linear systems
optimal control
time-varying systems
coupled Riccati equations
Opis:
In the present paper optimal time-invariant state feedback controllers are designed for a class of discrete time-varying control systems with Markov jumping parameter and quadratic performance index. We assume that the coefficients have limits as time tends to infinity and the boundary system is absolutely observable and stabilizable. Moreover, following the same line of reasoning, an adaptive controller is proposed in the case when system parameters are unknown but their strongly consistent estimators are available.
Źródło:
International Journal of Applied Mathematics and Computer Science; 2002, 12, 2; 203-207
1641-876X
2083-8492
Pojawia się w:
International Journal of Applied Mathematics and Computer Science
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
On the existence of optimal consensus control for the fractional Cucker-Smale model
Autorzy:
Almeida, R.
Kamocki, R.
Malinowska, A. B.
Odzijewicz, T.
Powiązania:
https://bibliotekanauki.pl/articles/1409211.pdf
Data publikacji:
2021
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
fractional calculus
fractional differential systems
flocking model
consensus
optimal control
Opis:
This paper addresses the nonlinear Cucker-Smale optimal control problem under the interplay of memory effect. The aforementioned effect is included by employing the Caputo fractional derivative in the equation representing the velocity of agents. Sufficient conditions for the existence of solutions to the considered problem are proved and the analysis of some particular problems is illustrated by two numerical examples.
Źródło:
Archives of Control Sciences; 2020, 30, 4; 625-651
1230-2384
Pojawia się w:
Archives of Control Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł

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