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    Wyświetlanie 1-14 z 14
    Tytuł:
    Control of an Induction Motor Using Sliding Mode Linearization
    Autorzy:
    Etien, E.
    Cauet, E.
    Rambault, L.
    Champenois, G.
    Powiązania:
    https://bibliotekanauki.pl/articles/908504.pdf
    Data publikacji:
    2002
    Wydawca:
    Uniwersytet Zielonogórski. Oficyna Wydawnicza
    Tematy:
    automatyka
    induction motor
    sliding mode control
    linearization
    Opis:
    Nonlinear control of the squirrel induction motor is designed using sliding mode theory. The developed approach leads to the design of a sliding mode controller in order to linearize the behaviour of an induction motor. The second problem described in the paper is decoupling between two physical outputs: the rotor speed and the rotor flux modulus. The sliding mode tools allow us to separate the control from these two outputs. To take account of parametric variations, a model-based approach is used to improve the robustness of the control law despite these perturbations. Experimental results obtained with a laboratory setup illustrate the good performance of this technique.
    Źródło:
    International Journal of Applied Mathematics and Computer Science; 2002, 12, 4; 523-531
    1641-876X
    2083-8492
    Pojawia się w:
    International Journal of Applied Mathematics and Computer Science
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Quasi-Sliding Mode Control of Discrete-Time Systems
    Autorzy:
    Bartoszewicz, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/908266.pdf
    Data publikacji:
    1999
    Wydawca:
    Uniwersytet Zielonogórski. Oficyna Wydawnicza
    Tematy:
    sterowanie
    system dyskretny
    sliding-mode control
    discrete-time systems
    Opis:
    A reaching law approach to the design of discrete-time quasi-sliding mode control systems is considered. First the required position of the system representative point with reference to the sliding plane is specified, and then novel control strategies, which drive the system in such a way that the position actually changes according to the specification, are proposed. The strategies are linear and consequently the undesirable chattering and high-frequency switching between different values of the control signal are avoided. Furthermore, the state of the controlled system is driven to the narrowest possible band around the sliding plane. The strategies, when compared with previously published results, are simpler and they guarantee favourable performance of the controlled systems while using essentially reduced control effort.
    Źródło:
    International Journal of Applied Mathematics and Computer Science; 1999, 9, 4; 801-810
    1641-876X
    2083-8492
    Pojawia się w:
    International Journal of Applied Mathematics and Computer Science
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Design of passive fault-tolerant controllers of a quadrotor based on sliding mode theory
    Autorzy:
    Merheb, A. R.
    Noura, H.
    Bateman, F.
    Powiązania:
    https://bibliotekanauki.pl/articles/331358.pdf
    Data publikacji:
    2015
    Wydawca:
    Uniwersytet Zielonogórski. Oficyna Wydawnicza
    Tematy:
    quadrotor UAV control
    fault tolerant control
    sliding mode control
    cascaded SMC
    bio inspired gain tuning
    Opis:
    In this paper, sliding mode control is used to develop two passive fault tolerant controllers for an AscTec Pelican UAV quadrotor. In the first approach, a regular sliding mode controller (SMC) augmented with an integrator uses the robustness property of variable structure control to tolerate partial actuator faults. The second approach is a cascaded sliding mode controller with an inner and outer SMC loops. In this configuration, faults are tolerated in the fast inner loop controlling the velocity system. Tuning the controllers to find the optimal values of the sliding mode controller gains is made using the ecological systems algorithm (ESA), a biologically inspired stochastic search algorithm based on the natural equilibrium of animal species. The controllers are tested using SIMULINK in the presence of two different types of actuator faults, partial loss of motor power affecting all the motors at once, and partial loss of motor speed. Results of the quadrotor following a continuous path demonstrated the effectiveness of the controllers, which are able to tolerate a significant number of actuator faults despite the lack of hardware redundancy in the quadrotor system. Tuning the controller using a faulty system improves further its ability to afford more severe faults. Simulation results show that passive schemes reserve their important role in fault tolerant control and are complementary to active techniques.
    Źródło:
    International Journal of Applied Mathematics and Computer Science; 2015, 25, 3; 561-576
    1641-876X
    2083-8492
    Pojawia się w:
    International Journal of Applied Mathematics and Computer Science
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Nonlinear controller design of a ship autopilot
    Autorzy:
    Tomera, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/907758.pdf
    Data publikacji:
    2010
    Wydawca:
    Uniwersytet Zielonogórski. Oficyna Wydawnicza
    Tematy:
    sterowanie ślizgowe
    sterowanie nieliniowe
    eliminacja zakłóceń
    sterowanie statkiem
    sliding-mode control
    nonlinear control
    disturbance rejection
    ship control
    Opis:
    The main goal here is to design a proper and efficient controller for a ship autopilot based on the sliding mode control method. A hydrodynamic numerical model of CyberShip II including wave effects is applied to simulate the ship autopilot system by using time domain analysis. To compare the results similar research was conducted with the PD controller, which was adapted to the autopilot system. The differences in simulation results between two controllers are analyzed by a cost function composed of a heading angle error and rudder deflection either in calm water or in waves. Simulation results show the effectiveness of the method in the presence of nonlinearities and disturbances, and high performance of the proposed controller.
    Źródło:
    International Journal of Applied Mathematics and Computer Science; 2010, 20, 2; 271-280
    1641-876X
    2083-8492
    Pojawia się w:
    International Journal of Applied Mathematics and Computer Science
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    An optimal sliding mode congestion controller for connection-oriented communication networks with lossy links
    Autorzy:
    Bartoszewicz, A.
    Leśniewski, P.
    Powiązania:
    https://bibliotekanauki.pl/articles/330586.pdf
    Data publikacji:
    2014
    Wydawca:
    Uniwersytet Zielonogórski. Oficyna Wydawnicza
    Tematy:
    optimal control
    sliding mode control
    flow control
    discrete-time system
    sterowanie optymalne
    sterowanie ślizgowe
    sterowanie przepływem
    układ dyskretny
    Opis:
    A new discrete-time sliding-mode congestion controller for connection-oriented networks is proposed. Packet losses which may occur during the transmission process are explicitly taken into account. Two control laws are presented, each obtained by minimizing a different cost functional. The first one concentrates on the output variable, whereas in the second one the whole state vector is considered. Weighting factors for adjusting the influence of the control signal and appropriate (state or output) errors are incorporated in both the functionals. The asymptotic stability of the closed-loop system is proved, and the conditions for 100% bottleneck node bandwidth utilization are derived. The performance of the proposed algorithm is verified by computer simulations.
    Źródło:
    International Journal of Applied Mathematics and Computer Science; 2014, 24, 1; 87-97
    1641-876X
    2083-8492
    Pojawia się w:
    International Journal of Applied Mathematics and Computer Science
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Regulation control of an underactuated mechanical system with discontinuous friction and backlash
    Autorzy:
    Rascón, R.
    Rosas, D.
    Hernandez-Balbuena, D.
    Powiązania:
    https://bibliotekanauki.pl/articles/330564.pdf
    Data publikacji:
    2017
    Wydawca:
    Uniwersytet Zielonogórski. Oficyna Wydawnicza
    Tematy:
    underactuated mechanical system
    sliding mode control
    H infinity control
    discontinuous observer
    sterowany układ mechaniczny
    sterowanie ślizgowe
    obserwator nieciągły
    Opis:
    In this work, the problem of position regulation control is addressed for a 2DOF underactuated mechanical system with friction and backlash. For this purpose, a method combining sliding mode and H∞ control is developed. We prove that the application of the method to the nonlinear model considered results in an asymptotically stable equilibria set. Moreover, it is possible to achieve a sufficiently small and bounded steady-state position error even in the presence of disturbances by employing the proposed technique. That is, the developed controller is able to account not only for unmatched external perturbations and model discrepancies of the test rig considered, but also for matched bounded perturbations. The control methodology is presented from both the theoretical and experimental angles to demonstrate the good performance of the proposed controller.
    Źródło:
    International Journal of Applied Mathematics and Computer Science; 2017, 27, 4; 785-797
    1641-876X
    2083-8492
    Pojawia się w:
    International Journal of Applied Mathematics and Computer Science
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    A fault tolerant direct control allocation scheme with integral sliding modes
    Autorzy:
    Hamayun, M. T.
    Edwards, C.
    Alwi, H.
    Bajodah, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/330832.pdf
    Data publikacji:
    2015
    Wydawca:
    Uniwersytet Zielonogórski. Oficyna Wydawnicza
    Tematy:
    fault tolerant control
    integral sliding mode control
    linear matrix inequalities
    sterowanie tolerujące uszkodzenia
    sterowanie ślizgowe
    liniowe nierówności macierzowe
    Opis:
    In this paper, integral sliding mode control ideas are combined with direct control allocation in order to create a fault tolerant control scheme. Traditional integral sliding mode control can directly handle actuator faults; however, it cannot do so with actuator failures. Therefore, a mechanism needs to be adopted to distribute the control effort amongst the remaining functioning actuators in cases of faults or failures, so that an acceptable level of closed-loop performance can be retained. This paper considers the possibility of introducing fault tolerance even if fault or failure information is not provided to the control strategy. To demonstrate the efficacy of the proposed scheme, a high fidelity nonlinear model of a large civil aircraft is considered in the simulations in the presence of wind, gusts and sensor noise.
    Źródło:
    International Journal of Applied Mathematics and Computer Science; 2015, 25, 1; 93-102
    1641-876X
    2083-8492
    Pojawia się w:
    International Journal of Applied Mathematics and Computer Science
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    A reference trajectory based discrete time sliding mode control strategy
    Autorzy:
    Bartoszewicz, Andrzej
    Adamiak, Katarzyna
    Powiązania:
    https://bibliotekanauki.pl/articles/330438.pdf
    Data publikacji:
    2019
    Wydawca:
    Uniwersytet Zielonogórski. Oficyna Wydawnicza
    Tematy:
    discrete time system
    sliding mode control
    reaching law
    reference trajectory
    układ dyskretno czasowy
    sterowanie ślizgowe
    trajektoria referencyjna
    Opis:
    This study presents a new, reference trajectory based sliding mode control strategy for disturbed discrete time dynamical systems. The desired trajectory, which is generated externally according to an existing switching type reaching law, determines the properties of the emerging sliding motion of the system. It is proved that an appropriate choice of the trajectory generator parameters ensures the existence of the quasi-sliding motion of the system according to the definition by Gao et al. (1995) in spite of the influence of disturbances. Moreover, the paper shows that the application of the desired trajectory based reaching law results in a significant reduction in the quasi-sliding mode band width and errors of all state variables. Therefore, in comparison with Gao’s control method, the system’s robustness is increased. The paper also presents an additional modification of the reaching law, which guarantees a further reduction in the quasi-sliding mode band in the case of slowly varying disturbances. The results are confirmed with a simulation example.
    Źródło:
    International Journal of Applied Mathematics and Computer Science; 2019, 29, 3; 517-525
    1641-876X
    2083-8492
    Pojawia się w:
    International Journal of Applied Mathematics and Computer Science
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Discrete-time sliding mode control of linear systems with input saturation
    Autorzy:
    Veselić, Boban
    Milosavljević, Čedomir
    Peruničić-Draženović, Branislava
    Huseinbegović, Senad
    Petronijević, Milutin
    Powiązania:
    https://bibliotekanauki.pl/articles/330574.pdf
    Data publikacji:
    2020
    Wydawca:
    Uniwersytet Zielonogórski. Oficyna Wydawnicza
    Tematy:
    discrete time sliding mode control
    super twisting controller
    input saturation
    disturbance compensation
    sterowanie ślizgowe
    nasycenie wejściowe
    kompensacja zakłóceń
    Opis:
    The paper proposes a discrete-time sliding mode controller for single input linear dynamical systems, under requirements of the fast response without overshoot and strong robustness to matched disturbances. The system input saturation is imposed during the design due to inevitable limitations of most actuators. The system disturbances are compensated by employing nonlinear estimation by integrating the signum of the sliding variable. Hence, the proposed control structure may be regarded as a super-twisting-like algorithm. The designed system stability is analyzed as well as the sliding manifold convergence conditions are derived using a discrete-time model of the system in the δ-domain. The results obtained theoretically have been verified by computer simulations.
    Źródło:
    International Journal of Applied Mathematics and Computer Science; 2020, 30, 3; 517-528
    1641-876X
    2083-8492
    Pojawia się w:
    International Journal of Applied Mathematics and Computer Science
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Neuro-adaptive cooperative control for high-order nonlinear multi-agent systems with uncertainties
    Autorzy:
    Peng, Cheng
    Zhang, Anguo
    Li, Junyu
    Powiązania:
    https://bibliotekanauki.pl/articles/2055174.pdf
    Data publikacji:
    2021
    Wydawca:
    Uniwersytet Zielonogórski. Oficyna Wydawnicza
    Tematy:
    multiagent system
    radial basis function
    RBF neural network
    sliding mode control
    cooperative control
    system wieloagentowy
    radialna funkcja bazowa
    sieć neuronowa RBF
    sterowanie ślizgowe
    Opis:
    The consensus problem for a class of high-order nonlinear multi-agent systems (MASs) with external disturbance and system uncertainty is studied. We design an online-update radial basis function (RBF) neural network based distributed adaptive control protocol, where the sliding model control method is also applied to eliminate the influence of the external disturbance and system uncertainty. System consensus is verified by using the Lyapunov stability theorem, and sufficient conditions for cooperative uniform ultimately boundedness (CUUB) are also derived. Two simulation examples demonstrate the effectiveness of the proposed method for both homogeneous and heterogeneous MASs.
    Źródło:
    International Journal of Applied Mathematics and Computer Science; 2021, 31, 4; 635--645
    1641-876X
    2083-8492
    Pojawia się w:
    International Journal of Applied Mathematics and Computer Science
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Lqr-Based Nonlinear Tuning Relay Control Design With Fast Convergence
    Autorzy:
    Yu, X.
    Xia, Y.
    Ledwich, G.
    Oghanna, W.
    Powiązania:
    https://bibliotekanauki.pl/articles/908299.pdf
    Data publikacji:
    1999
    Wydawca:
    Uniwersytet Zielonogórski. Oficyna Wydawnicza
    Tematy:
    sterowanie rozdzielcze
    sterowanie przekaźnikowe
    switching control
    LQR
    relay control
    sliding mode
    Opis:
    In this article, we present a relay control scheme based on LQR design with fast convergence. This scheme provides a practical and simple way to achieve fast convergence based on the well-known LQR design principle. The controller is a global stabiliser in the sense that for any given initial condition, we can always initialize the controller to drive the system to reach the origin. This controller is tunable in accordance with the position of the system state: the closer to the origin, the larger the control gains, which results in a fast control that maintains bounded control magnitude. It has also been shown that setting matrix Q can significantly influence the tendency of eigenvalues to switch the hyperplane. The relation between matrix Q and the tendency of those eigenvalues has been identified. Simulation results are presented to demonstrate the effectiveness of the scheme.
    Źródło:
    International Journal of Applied Mathematics and Computer Science; 1999, 9, 2; 313-326
    1641-876X
    2083-8492
    Pojawia się w:
    International Journal of Applied Mathematics and Computer Science
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    LMI-based adaptive fuzzy integral sliding mode control of mismatched uncertain systems
    Autorzy:
    Mnasri, C.
    Gasmi, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/930163.pdf
    Data publikacji:
    2011
    Wydawca:
    Uniwersytet Zielonogórski. Oficyna Wydawnicza
    Tematy:
    sterowanie rozmyte
    sterowanie ślizgowe
    liniowa nierówność macierzowa
    system niepewny
    adaptive fuzzy control
    integral sliding mode
    LMI
    mismatched uncertainties
    Opis:
    Integral sliding mode design is considered for a class of uncertain systems in the presence of mismatched uncertainties in both state and input matrices, as well as norm-bounded nonlinearities and external disturbances. A sufficient condition for the robust stability of the sliding manifold is derived by means of linear matrix inequalities. The initial existence of the sliding mode is guaranteed by the proposed control law. The improvement of the proposed control scheme performances, such as chattering elimination and estimation of norm bounds of uncertainties, is then considered with the application of an adaptive fuzzy integral sliding mode control law. The validity and efficiency of the proposed approaches are investigated through a sixth order uncertain mechanical system.
    Źródło:
    International Journal of Applied Mathematics and Computer Science; 2011, 21, 4; 605-615
    1641-876X
    2083-8492
    Pojawia się w:
    International Journal of Applied Mathematics and Computer Science
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    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
    Artykuł
    Tytuł:
    A fault estimation and fault-tolerant control based sliding mode observer for LPV descriptor systems with time delay
    Autorzy:
    Hamdi, Habib
    Rodrigues, Mickael
    Rabaoui, Bouali
    Benhadj Braiek, Naceur
    Powiązania:
    https://bibliotekanauki.pl/articles/1838208.pdf
    Data publikacji:
    2021
    Wydawca:
    Uniwersytet Zielonogórski. Oficyna Wydawnicza
    Tematy:
    fault estimation
    fault-tolerant control
    LPV descriptor system
    sliding mode observer
    time delay
    LMIs
    linear matrix inequalities
    estymacja błędu
    sterowanie odporne na uszkodzenia
    sterowanie ślizgowe
    liniowa nierówność macierzowa
    Opis:
    This paper considers the problem of fault-tolerant control (FTC) and fault reconstruction of actuator faults for linear parameter varying (LPV) descriptor systems with time delay. A polytopic sliding mode observer (PSMO) is synthesized to achieve simultaneous reconstruction of LPV polytopic descriptor system states and actuator faults. Exploiting the reconstructed actuator faults and state estimates, a fault-tolerant controller is designed to compensate the impact of actuator faults on system performance by stabilizing the closed-loop LPV delayed descriptor system. Besides, the controller and PSMO gains are obtained throughout the resolution of linear matrix inequalities (LMIs) using convex optimization techniques. The developed PSMO could force the output estimation error to converge to zero in a finite time when the actuators faults are bounded through the reinjection of the output estimation error via a nonlinear switching term. Simulation results applied to a given numerical system are presented to highlight the superiority and effectiveness of the proposed approach.
    Źródło:
    International Journal of Applied Mathematics and Computer Science; 2021, 31, 2; 247-258
    1641-876X
    2083-8492
    Pojawia się w:
    International Journal of Applied Mathematics and Computer Science
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-14 z 14

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