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    Wyświetlanie 1-7 z 7
    Tytuł:
    Sliding mode control for longitudinal aircraft dynamics
    Autorzy:
    Iskrenovic-Momcilovic, O.
    Powiązania:
    https://bibliotekanauki.pl/articles/385149.pdf
    Data publikacji:
    2018
    Wydawca:
    Sieć Badawcza Łukasiewicz - Przemysłowy Instytut Automatyki i Pomiarów
    Tematy:
    aircraft dynamics
    control
    elevator
    longitudinal
    sliding mode
    Opis:
    The control of the longitudinal aircraft dynamics is challenging because the mathematical model of aircraft is highly nonlinear. This paper considers a sliding mode control design based on linearization of the aircraft, with the pitch angle and elevator deflection as the trim variables. The design further exploits the decomposition of the aircraft dynamics into its short-period and phugoid approximations. The discrete-time variable structure system synthesis is performed on the base of the elevator transfer function short-period approximation. This control system contains a sliding mode controller, an observer, based on nominal aircraft model without finite zero and two additional control channels for the aircraft and for the aircraft model. The realised system is stable and robust for parameter and external disturbances.
    Źródło:
    Journal of Automation Mobile Robotics and Intelligent Systems; 2018, 12, 3; 55-60
    1897-8649
    2080-2145
    Pojawia się w:
    Journal of Automation Mobile Robotics and Intelligent Systems
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Robust impedance control of a piezoelectric stage under thermal and external load disturbances
    Autorzy:
    Zareinejad, M.
    Rezaei, S. M.
    Ghidary, S. S.
    Abdullah, A.
    Motamedi, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/969687.pdf
    Data publikacji:
    2009
    Wydawca:
    Polska Akademia Nauk. Instytut Badań Systemowych PAN
    Tematy:
    piezoelectric actuator
    sliding mode
    impedance control
    hysteresis
    Opis:
    Piezoelectric actuators are widely used in micromanipulation tasks such as atomic force microscopy and cell manipulation. However, the hysteresis nonlinearity and the creep reduce their fidelity and cause difficulties in the micromanipulation control procedure. Besides, variation of temperature and external loads could change the model parameters identified for the piezo actuator. In this paper, a novel feedforward-feedback controller is proposed. The modified Prandtl-Ishlinskii model is utilized to linearize the actuator hysteresis in feedforward scheme and a sliding mode based impedance control with perturbation estimation is used to cancel out the thermal and external load disturbances in feedback scheme. The efficiency of the proposed controller is verified by experiments.
    Źródło:
    Control and Cybernetics; 2009, 38, 3; 635-648
    0324-8569
    Pojawia się w:
    Control and Cybernetics
    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:
    Finite-time integral sliding mode control for chaotic permanent magnet synchronous motor systems
    Autorzy:
    Chibani, A.
    Daaou, B.
    Gouichiche, A.
    Safa, A.
    Messlem, Y.
    Powiązania:
    https://bibliotekanauki.pl/articles/140698.pdf
    Data publikacji:
    2017
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    chaos control
    control chaotic Permanent Magnet Synchronous Motor
    finite-time
    sliding mode
    Opis:
    In this paper, an integral finite-time sliding mode control scheme is presented for controlling a chaotic permanent magnet synchronous motor (PMSM). The controller can stabilize the system output tracking error to zero in a finite time. Using Lyapunov’s stability theory, the stability of the proposed scheme is verified. Numerical simulation results are presented to present the effectiveness of the proposed approach.
    Źródło:
    Archives of Electrical Engineering; 2017, 66, 2; 229-239
    1427-4221
    2300-2506
    Pojawia się w:
    Archives of Electrical Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    High performance backstepping control of induction motor with adaptive sliding mode observer
    Autorzy:
    Bakhti, I.
    Chaouch, S.
    Maakouf, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/229996.pdf
    Data publikacji:
    2011
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    induction motor
    backstepping control
    sliding mode
    flux observer design
    estimation
    sensorless control
    Opis:
    It is well known that modern control of induction motor relies on a good dynamic model of the motor. Extensive research and activity have been devoted to the problem of induction motor control over the last decade. In this paper we introduce backstepping control with amelioration of performance to guarantee stability of the system. Accurate knowledge of the rotor speed and flux position is the key factor in obtaining a high-performance and high-efficiency induction-motor drive. Thus a sliding mode observer design is presented. Simulation results are included to illustrate good performance of backstepping control of sensorless induction motors with flux observer.
    Źródło:
    Archives of Control Sciences; 2011, 21, 3; 331-344
    1230-2384
    Pojawia się w:
    Archives of Control Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Motion control and collision avoidance algorithms for unmanned surface vehicle swarm in practical maritime environment
    Autorzy:
    Zhuang, Jiayuan
    Zhang, Lei
    Qin, Zihe
    Sun, Hanbing
    Wang, Bo
    Cao, Jian
    Powiązania:
    https://bibliotekanauki.pl/articles/260012.pdf
    Data publikacji:
    2019
    Wydawca:
    Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
    Tematy:
    USV
    swarm control
    collision avoidance
    sliding mode
    artificial potential field
    Opis:
    The issue of controlling a swarm of autonomous unmanned surface vehicles (USVs) in a practical maritime environment is studied in this paper. A hierarchical control framework associated with control algorithms for the USV swarm is proposed. In order to implement the distributed control of the autonomous swarm, the control framework is divided into three task layers. The first layer is the tele-operated task layer, which delivers the human operator’s command to the remote USV swarm. The second layer deals with autonomous tasks (i.e. swarm dispersion, or avoidance of obstacles and/or inner-USV collisions), which are defined by specific mathematical functions. The third layer is the control allocation layer, in which the control inputs are designed by applying the sliding mode control method. The motion controller is proved asymptotically stable by using the Lyapunov method. Numerical simulation of USV swarm motion is used to verify the effectiveness of the control framework.
    Źródło:
    Polish Maritime Research; 2019, 1; 107-116
    1233-2585
    Pojawia się w:
    Polish Maritime Research
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    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
    Artykuł
      Wyświetlanie 1-7 z 7

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