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Wyszukujesz frazę "control Lyapunov function" wg kryterium: Temat

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    Wyświetlanie 1-6 z 6
    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 NOx 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
    Artykuł
    Tytuł:
    Adaptive backstepping tracking control for an over-actuated DP marine vessel with inertia uncertainties
    Autorzy:
    Witkowska, A.
    Śmierzchalski, R.
    Powiązania:
    https://bibliotekanauki.pl/articles/331460.pdf
    Data publikacji:
    2018
    Wydawca:
    Uniwersytet Zielonogórski. Oficyna Wydawnicza
    Tematy:
    over actuated control
    adaptive control
    Lyapunov function
    control allocation
    MIMO system
    sterowanie adaptacyjne
    funkcja Lapunowa
    system MIMO
    Opis:
    Designing a tracking control system for an over-actuated dynamic positioning marine vessel in the case of insufficient information on environmental disturbances, hydrodynamic damping, Coriolis forces and vessel inertia characteristics is considered. The designed adaptive MIMO backstepping control law with control allocation is based on Lyapunov control theory for cascaded systems to guarantee stabilization of the marine vessel position and heading. Forces and torque computed from the adaptive control law are allocated to individual thrusters by employing the quadratic programming method in combination with the cascaded generalized inverse algorithm, the weighted least squares algorithm and the minimal least squares algorithm. The effectiveness of the proposed control scheme is demonstrated by simulations involving a redundant set of actuators. The evaluation criteria include energy consumption, robustness, as well accuracy of tracking during typical vessel operation.
    Źródło:
    International Journal of Applied Mathematics and Computer Science; 2018, 28, 4; 679-693
    1641-876X
    2083-8492
    Pojawia się w:
    International Journal of Applied Mathematics and Computer Science
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    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
    Artykuł
    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
    Artykuł
    Tytuł:
    Hybrid synchronization and parameter estimation of a complex chaotic network of permanent magnet synchronous motors using adaptive integral sliding mode control
    Autorzy:
    Siddique, Nazam
    Rehman, Fazal U.
    Powiązania:
    https://bibliotekanauki.pl/articles/2128164.pdf
    Data publikacji:
    2021
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    chaotic systems
    hybrid synchronization
    HS
    complex chaotic permanent magnet synchronous motor
    adaptive integral sliding mode control
    ISMC
    Lyapunov function
    systemy chaotyczne
    synchronizacja hybrydowa
    złożony chaotyczny silnik synchroniczny z magnesami trwałymi
    adaptacyjne zintegrowane sterowanie trybem przesuwu
    funkcja Lapunowa
    Opis:
    The synchronisation of a complex chaotic network of permanent magnet synchronous motor systems has increasing practical importance in the field of electrical engineering. This article presents the control design method for the hybrid synchronization and parameter estimation of ring-connected complex chaotic network of permanent magnet synchronous motor systems. The design of the desired control law is a challenging task for control engineers due to parametric uncertainties and chaotic responses to some specific parameter values. Controllers are designed based on the adaptive integral sliding mode control to ensure hybrid synchronization and estimation of uncertain terms. To apply the adaptive ISMC, firstly the error system is converted to a unique system consisting of a nominal part along with the unknown terms which are computed adaptively. The stabilizing controller incorporating nominal control and compensator control is designed for the error system. The compensator controller, as well as the adopted laws, are designed to get the first derivative of the Lyapunov equation strictly negative. To give an illustration, the proposed technique is applied to 4-coupled motor systems yielding the convergence of error dynamics to zero, estimation of uncertain parameters, and hybrid synchronization of system states. The usefulness of the proposed method has also been tested through computer simulations and found to be valid.
    Źródło:
    Bulletin of the Polish Academy of Sciences. Technical Sciences; 2021, 69, 3; e137056, 1--9
    0239-7528
    Pojawia się w:
    Bulletin of the Polish Academy of Sciences. Technical Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Hybrid synchronization and parameter estimation of a complex chaotic network of permanent magnet synchronous motors using adaptive integral sliding mode control
    Autorzy:
    Siddique, Nazam
    Rehman, Fazal U.
    Powiązania:
    https://bibliotekanauki.pl/articles/2173614.pdf
    Data publikacji:
    2021
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    chaotic systems
    hybrid synchronization
    HS
    complex chaotic permanent magnet synchronous motor
    adaptive integral sliding mode control
    ISMC
    Lyapunov function
    systemy chaotyczne
    synchronizacja hybrydowa
    złożony chaotyczny silnik synchroniczny z magnesami trwałymi
    adaptacyjne zintegrowane sterowanie trybem przesuwu
    funkcja Lapunowa
    Opis:
    The synchronisation of a complex chaotic network of permanent magnet synchronous motor systems has increasing practical importance in the field of electrical engineering. This article presents the control design method for the hybrid synchronization and parameter estimation of ring-connected complex chaotic network of permanent magnet synchronous motor systems. The design of the desired control law is a challenging task for control engineers due to parametric uncertainties and chaotic responses to some specific parameter values. Controllers are designed based on the adaptive integral sliding mode control to ensure hybrid synchronization and estimation of uncertain terms. To apply the adaptive ISMC, firstly the error system is converted to a unique system consisting of a nominal part along with the unknown terms which are computed adaptively. The stabilizing controller incorporating nominal control and compensator control is designed for the error system. The compensator controller, as well as the adopted laws, are designed to get the first derivative of the Lyapunov equation strictly negative. To give an illustration, the proposed technique is applied to 4-coupled motor systems yielding the convergence of error dynamics to zero, estimation of uncertain parameters, and hybrid synchronization of system states. The usefulness of the proposed method has also been tested through computer simulations and found to be valid.
    Źródło:
    Bulletin of the Polish Academy of Sciences. Technical Sciences; 2021, 69, 3; art. no. e137056
    0239-7528
    Pojawia się w:
    Bulletin of the Polish Academy of Sciences. Technical Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-6 z 6

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