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    Wyświetlanie 1-46 z 46
    Tytuł:
    Projektowanie wielowymiarowego regulatora backstepping w układzie dynamicznego pozycjonowania statku
    Designing a multidimensional backstepping controller in dynamic positioning system
    Autorzy:
    Witkowska, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/267298.pdf
    Data publikacji:
    2014
    Wydawca:
    Politechnika Gdańska. Wydział Elektrotechniki i Automatyki
    Tematy:
    dynamiczne pozycjonowanie
    backstepping
    nieliniowy regulator PID
    dynamic positioning
    vectorial backstepping
    nonlinear PID
    Opis:
    W komercyjnych systemach dynamicznego pozycjonowania statku, pomimo znacznego wzrostu poziomu automatyzacji, wykorzystywane jest nadal sterowanie typu PID. Poprawę jakości procesu pozycjonowania może umożliwić wykorzystanie bardziej efektywnych algorytmów, oferujących zaawansowane nieliniowe techniki sterowania. W artykule przedstawiono zagadnienie projektowania regulatora pozycji i kursu dla układu dynamicznego pozycjonowania statku, z zastosowaniem rekurencyjnej wektorowej metody backstepping. Wielowymiarowy regulator backstepping został zastosowany do stabilizacji pozycji i kursu na wartościach zadanych, w obecności zakłóceń falowych. Do estymacji prędkości statku i filtracji zakłóceń zastosowano nieliniowy obserwator pasywny. Wyniki symulacji porównano z nieliniowym regulatorem PID.
    In commercial Dynamic Positioning systems is still used PID control, despite a significant increase in the level of automation. To improve the quality of the positioning of the vessel may allow the use of more effective methods and algorithms, providing advanced nonlinear control techniques.The problem of synthesis a dynamic positioning system for low frequency model of surface vessel was considered in this paper. The recursive vectorial backstepping control design was used to keep a fixed position and heading in presence of wave disturbances. The passive observer was introduced to smooth the measurements and to estimate the velocities needed for the control algorithm. The simulation results were compared with PID controller.
    Źródło:
    Zeszyty Naukowe Wydziału Elektrotechniki i Automatyki Politechniki Gdańskiej; 2014, 40; 141-144
    1425-5766
    2353-1290
    Pojawia się w:
    Zeszyty Naukowe Wydziału Elektrotechniki i Automatyki Politechniki Gdańskiej
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Non-linear backstepping ship course controller
    Autorzy:
    Witkowska, A.
    Śmierzchalski, R.
    Powiązania:
    https://bibliotekanauki.pl/articles/2069612.pdf
    Data publikacji:
    2007
    Wydawca:
    Uniwersytet Morski w Gdyni. Polskie Towarzystwo Bezpieczeństwa i Niezawodności
    Tematy:
    backstepping
    Lapunov function
    asymptotic stability
    Opis:
    A ship, as an object for course control, is characterised by a nonlinear function describing the static manoeuvring characteristics. One of the methods, which can be used, for designing a non-linear course controller for ships is the backstepping method. It was used here for designing the configurations of non-linear controllers, which were then applied for ship course control. The parameters of the obtained non-linear control structures were tuned to optimise the operation of the control system. The optimisation was performed using genetic algorithms. The quality of operation of the designed control algorithms was checked in simulation tests performed on the mathematical model of the tanker completed by steering gear.
    Źródło:
    Journal of Polish Safety and Reliability Association; 2007, 2; 355--361
    2084-5316
    Pojawia się w:
    Journal of Polish Safety and Reliability Association
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Ship course control system taking into account the steering gear dynamic properties
    Sterownie kursem statku z uwzględnieniem własności dynamicznych maszyny sterowej
    Autorzy:
    Witkowska, A.
    Śmierzchalski, R.
    Powiązania:
    https://bibliotekanauki.pl/articles/359682.pdf
    Data publikacji:
    2012
    Wydawca:
    Akademia Morska w Szczecinie. Wydawnictwo AMSz
    Tematy:
    autopilot
    nieliniowe sterowanie
    metoda backstepping
    algorytm genetyczny
    nonlinear control
    backstepping method
    genetic algorithm
    Opis:
    The article presents various configurations of nonlinear ship course controllers. The controllers were designed based on backstepping method, the PD and sliding mode control. The controller versions at the design stage take into account the dynamic properties of the steering gear. A simplified simulation model of the B-481 type vessel, including wave and wind effects, was applied to simulate the control algorithm by using time domain analysis. The results of computer simulations have shown the advantages of control algorithms taking into account the dynamics of steering gear such as the increasing the economic efficiency of system operation, the reducing rudder activity and increasing the average speed of the vessel during the voyage.
    W artykule zostały przedstawione różne konfiguracje regulatorów nieliniowych do sterowania kursem statku. Dwie z nich uwzględniają na etapie projektowania liniowe własności dynamiczne urządzenia wykonawczo-sterującego maszyny sterowej. Projekty regulatorów oparto na metodzie backstepping, regulatorze PD oraz sterowaniu ślizgowym. Dokonano analizy porównawczej jakości pracy rozpatrywanych struktur sterowania podczas badań symulacyjnych na pełnowymiarowym modelu symulacyjnym statku typu B-481. Wyniki badań symulacji komputerowych wykazały przewagę algorytmów sterowania z uwzględnieniem dynamiki maszyny sterowej poprzez zwiększenie wydajności ekonomicznej pracy układu, zmniejszenie aktywności steru oraz zwiększenie średniej prędkości statku podczas podróży.
    Źródło:
    Zeszyty Naukowe Akademii Morskiej w Szczecinie; 2012, 30 (102); 158-165
    1733-8670
    2392-0378
    Pojawia się w:
    Zeszyty Naukowe Akademii Morskiej w Szczecinie
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Adaptacyjny regulator kursu statku z zastosowaniem metody backstepping
    Adaptive ship course controller with use of the backstepping method
    Autorzy:
    Witkowska, A.
    Śmierzchalski, R.
    Powiązania:
    https://bibliotekanauki.pl/articles/157277.pdf
    Data publikacji:
    2012
    Wydawca:
    Stowarzyszenie Inżynierów i Techników Mechaników Polskich
    Tematy:
    autopilot
    sterowanie adaptacyjne
    backstepping
    projektowanie prawa sterowania
    adaptive control
    nonlinear control
    backstepping method
    genetic algorithm
    Opis:
    W układach morskich aplikacja nieliniowych technik adaptacyjnych do sterowania ruchem statku jest obecnie niezbędna aby uwzględnić występujące niepewności strukturalne i parametryczne. Jest to szczególnie istotne, ponieważ dynamika statku zależy od dużej masy i wpływu zakłóceń środowiskowych zarówno addytywnych jak i multiplikatywnych, wywołanych przez fale, wiatry i prądy oceaniczne. Artykuł obejmuje zagadnienie projektowania adaptacyjnego układu regulacji kursem statku morskiego. Zaproponowany algorytm sterowania opiera się na adaptacyjnej metodzie backstepping z prawem adaptacji parametrów modelu statku wyprowadzonym w oparciu o teorię II funkcji Lapunowa. W artykule została przeprowadzona analiza poprawności oraz jakości zaprojektowanego regulatora adaptacyjnego. Zbadano zdolność śledzenia zmian wartości zadanej kursu oraz zbieżność do rzeczywistych wartości parametrów. Istotnym problemem w metodzie backstepping jest uwzględnienie na etapie projektowania, urządzenia wykonawczo-sterującego jakim jest maszyna sterowa, ze względu na nieliniową dynamikę opisaną za pomocą nieliniowości z nasyceniem. Algorytmy sterowania dostępne zarówno w literaturze jak i zastosowaniach morskich zazwyczaj zaniedbują dynamikę maszyny sterowej. Przy opracowaniu algorytmu sterowania przyjęty został uproszczony model matematyczny dynamiki statku, natomiast badania symulacyjne wykonano z pełnowymiarowym modelem statku typu B-481.
    The paper deals with issues concerning the advanced ship course control system. The control algorithm suggested in the work is based on the backstepping method and a genetic algorithm. The ship course adaptive controller configuration was designed with use of the backstepping procedure [see section 2]. The controller version (17) includes the adaptation block of ship model parameters (23)-(25). The adaptation of ship model parameters to the updating law derived on a basis of II Function Lyapunov theory enables us to obtain good adaptation properties of the system in the presence of the so-called parametric uncertainties, e.g. connected with the influence of environmental disturbances, such as wind or a sea wave. The adjustable parameters of the obtained nonlinear steering structures (Fig. 1.) were tuned up in order to optimize the system operation. A genetic algorithm was used for optimization. The quality of operation of the obtained steering structures was analyzed by conducting simulation experiments on a simplified (1)-(4) and complex simulation model of a ship of type B-481, [see Sections 3,4]. The results of computer simulation experiments showed the high quality of control and system stability of such steering (Figs. 2, 3, 4). The considered system realizes basic tasks, such as: stabilization of the system, the tuning of controller amplification, adaptation of the system to changing environmental conditions.
    Źródło:
    Pomiary Automatyka Kontrola; 2012, R. 58, nr 8, 8; 750-753
    0032-4140
    Pojawia się w:
    Pomiary Automatyka Kontrola
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Control system design for dynamic positioning using vectorial backstepping
    Autorzy:
    Witkowska, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/359838.pdf
    Data publikacji:
    2013
    Wydawca:
    Akademia Morska w Szczecinie. Wydawnictwo AMSz
    Tematy:
    dynamic positioning
    backstepping
    nonlinear passive observer
    Opis:
    The problem of synthesis a dynamic positioning system for low frequency model of surface vessel was considered in this paper. The recursive vectorial backstepping control design was used to keep a fixed position and heading in presence of wave disturbances. The passive observer was introduced to smooth the measurements and to estimate the velocities needed for the control algorithm. The computer simulation results were given to demonstrate the effectiveness of that combination of controller-observer system to compensate environmental disturbances.
    Źródło:
    Zeszyty Naukowe Akademii Morskiej w Szczecinie; 2013, 36 (108) z. 1; 182-187
    1733-8670
    2392-0378
    Pojawia się w:
    Zeszyty Naukowe Akademii Morskiej w Szczecinie
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Pre-filtered backstepping control for underactuated ship path following
    Autorzy:
    Liu, Zhiquan
    Powiązania:
    https://bibliotekanauki.pl/articles/259576.pdf
    Data publikacji:
    2019
    Wydawca:
    Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
    Tematy:
    underactuated ships
    path following
    backstepping
    pre-filter
    Opis:
    Robust path following control for underactuated surface ships is an important issue in marine control practice. This paper aims to improve the robustness of the close-loop system with model uncertainties and time-varying disturbances. A practical adaptive backstepping control scheme with a pre-filter is proposed to force a surface vessel to track the predefined path generated by the virtual ship. Based on the Lyapunov stability theorem, this algorithm can guarantee all error signals in the overall system to be uniformly ultimately bounded, and it can be implemented without exact knowledge of the nonlinear damping structure and environmental disturbances. The proposed pre-filter can smooth the commanded heading order and obtain a better performance of the waypoint-based navigation control system. Two simulation cases are drawn to illustrate the validity of the proposed control strategy.
    Źródło:
    Polish Maritime Research; 2019, 2; 68-75
    1233-2585
    Pojawia się w:
    Polish Maritime Research
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Dynamically positioned ship steering making use of backstepping method and artificial neural networks
    Autorzy:
    Witkowska, A.
    Rynkiewicz, T. N.
    Powiązania:
    https://bibliotekanauki.pl/articles/260171.pdf
    Data publikacji:
    2018
    Wydawca:
    Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
    Tematy:
    backstepping
    neural networks
    RBF
    dynamic ship positioning
    Opis:
    The article discusses the issue of designing a dynamic ship positioning system making use of the adaptive vectorial backstepping method and RBF type artificial neural networks. In the article, the backstepping controller is used to determine control laws and neural network weight adaptation laws. The artificial neural network is applied at each time instant to approximate nonlinear functions containing parametric uncertainties. The proposed control system does not require precise knowledge of the model of ship dynamics and external disturbances, it also eliminates the problem of analytical determination of the regression matrix when designing the control law with the aid of the adaptive backstepping procedure.
    Źródło:
    Polish Maritime Research; 2018, 4; 5-12
    1233-2585
    Pojawia się w:
    Polish Maritime Research
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Sterowanie nieliniowe backstepping wahadła odwróconego z napędem inercyjnym
    Non-Linear Backstepping Control for an Inertia Wheel Pendulum
    Autorzy:
    Owczarkowski, A.
    Bachman, P.
    Gośliński, J.
    Owczarek, P.
    Regulski, R.
    Powiązania:
    https://bibliotekanauki.pl/articles/159172.pdf
    Data publikacji:
    2014
    Wydawca:
    Sieć Badawcza Łukasiewicz - Instytut Elektrotechniki
    Tematy:
    sterowanie nieliniowe
    backstepping
    LQR
    IWP
    nonlinear control
    Opis:
    W artykule przedstawiono działanie nieliniowego algorytmu sterowania backstepping użytego do stabilizacji wahadła odwróconego IWP (Inertia Wheel Pendulum). Analizowanym obiektem jest konstrukcja umocowana na dwóch kołach i posiadająca silnik napędzający koło zamachowe. To czyni z niej nieliniowy układ o dwóch stopniach swobody (kąt odchylenia od pionu i kąt obrotu koła) i jednym wymuszeniu (moment siły na wale silnika). Jako punkt pracy obrano niestabilną pozycję pionową. W oparciu o teorię stabilności Lapunowa, analitycznie wyznaczono prawo sterowania. Dla porównania wyznaczono również sterowanie liniowo-kwadratowe LQR (Linear Quadratic Regulator). Wykonano testy symulacyjne obu algorytmów wykazując, że w wielu sytuacjach sterowanie backstepping pozwala uzyskać lepsze rezultaty niż sterowanie LQR.
    This article describes the non-linear backstepping control algorithm used to stabilize the inverted pendulum IWP (Inertia Wheel Pendulum). The analysed object is a construction mounted on two wheels with an electric motor accelerating the flywheel. This is the non-linear system with two degrees of freedom (the angle of inclination and rotation of the wheel) and one actuator (torque on the motor shaft). The vertical position is the unstable operating point. The Lyapunov stability theory allowed to formulate the control law analyticity. The result is compared with the linear-quadratic control LQR (Linear Quadratic Regulator). The simulation tests showed differences of both algorithms and benefits of using backstepping.
    Źródło:
    Prace Instytutu Elektrotechniki; 2014, 264; 51-63
    0032-6216
    Pojawia się w:
    Prace Instytutu Elektrotechniki
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Analysis of impact of ship model parameters on changes of control quality index in ship dynamic positioning system
    Autorzy:
    Rynkiewicz, Tacjana Niksa
    Witkowska, Anna
    Powiązania:
    https://bibliotekanauki.pl/articles/259774.pdf
    Data publikacji:
    2019
    Wydawca:
    Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
    Tematy:
    backstepping
    ship dynamic positioning
    system’s susceptibility
    Opis:
    In this work there is presented an analysis of impact of ship model parameters on changes of control quality index in a ship dynamic positioning system designed with the use of a backstepping adaptive controller. Assessment of the impact of ship model parameters was performed on the basis of Pareto-Lorentz curves and ABC method in order to determine sets of the parameters which have either crucial, moderate or low impact on objective function. Simulation investigations were carried out with taking into account integral control quality indices.
    Źródło:
    Polish Maritime Research; 2019, 1; 6-14
    1233-2585
    Pojawia się w:
    Polish Maritime Research
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Backstepping sliding mode controller improved with fuzzy logic: Application to the quadrotor helicopter
    Autorzy:
    Zeghlache, S.
    Saigaa, D.
    Harrag, A.
    Kara, K.
    Bouguerra, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/229480.pdf
    Data publikacji:
    2012
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    fuzzy sliding mode
    backstepping
    quadrotor helicopter
    dynamic modeling
    Opis:
    n this paper we present a new design method for the fight control of an autonomous quadrotor helicopter based on fuzzy sliding mode control using backstepping approach. Due to the underactuated property of the quadrotor helicopter, the controller can move three positions (x;y; z) of the helicopter and the yaw angle to their desired values and stabilize the pitch and roll angles. A first-order nonlinear sliding surface is obtained using the backstepping technique, on which the developed sliding mode controller is based. Mathematical development for the stability and convergence of the system is presented. The main purpose is to eliminate the chattering phenomenon. Thus we have used a fuzzy logic control to generate the hitting control signal. The performances of the nonlinear control method are evaluated by simulation and the results demonstrate the effectiveness of the proposed control strategy for the quadrotor helicopter in vertical flights.
    Źródło:
    Archives of Control Sciences; 2012, 22, 3; 315-342
    1230-2384
    Pojawia się w:
    Archives of Control Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Analysis, adaptive control and synchronization of a novel 4-D hyperchaotic hyperjerk system and its SPICE implementation
    Autorzy:
    Vaidyanathan, S.
    Volos, C.
    Pham, V.-T.
    Madhavan, K.
    Powiązania:
    https://bibliotekanauki.pl/articles/229709.pdf
    Data publikacji:
    2015
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    hyperchaos
    hyperjerk system
    adaptive control
    backstepping control
    synchronization
    Opis:
    A hyperjerk system is a dynamical system, which is modelled by an nth order ordinary differential equation with n 4 describing the time evolution of a single scalar variable. Equivalently, using a chain of integrators, a hyperjerk system can be modelled as a system of n first order ordinary differential equations with n 4. In this research work, a 4-D novel hyperchaotic hyperjerk system has been proposed, and its qualitative properties have been detailed. The Lyapunov exponents of the novel hyperjerk system are obtained as L1 = 0:1448;L2 = 0:0328;L3 = 0 and L4 = −1:1294. The Kaplan-Yorke dimension of the novel hyperjerk system is obtained as DKY = 3:1573. Next, an adaptive backstepping controller is designed to stabilize the novel hyperjerk chaotic system with three unknown parameters. Moreover, an adaptive backstepping controller is designed to achieve global hyperchaos synchronization of the identical novel hyperjerk systems with three unknown parameters. Finally, an electronic circuit realization of the novel jerk chaotic system using SPICE is presented in detail to confirm the feasibility of the theoretical hyperjerk model.
    Źródło:
    Archives of Control Sciences; 2015, 25, 1; 135-158
    1230-2384
    Pojawia się w:
    Archives of Control Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    An efficiency no adaptive backstepping speed controller based direct torque control
    Autorzy:
    Ghezouani, A.
    Gasbaoui, B.
    Ghouili, J.
    Benayed, A. A.
    Powiązania:
    https://bibliotekanauki.pl/articles/384812.pdf
    Data publikacji:
    2017
    Wydawca:
    Sieć Badawcza Łukasiewicz - Przemysłowy Instytut Automatyki i Pomiarów
    Tematy:
    backstepping
    induction motor
    DTC
    PI controller
    fuzzy controller
    Opis:
    The most problem of direct torque control are high torque ripple and Settling time to overcome this problem an efficiency Backstopping speed controller are proposed. This paper makes a comparison of the effectiveness of three PI speed controller based direct torque control, the first one is the classical PI speed controller (CL-PISC), the second are no Adaptive Backstepping controller (NABACKSC), and the third type are adaptive fuzzy PI controller (AF-PISC). The parameters of adaptive fuzzy PI are dynamically adjusted with the assistance of fuzzy logic controller. The non-Adaptive Backstopping controller is designed based on the Lyapunov stability theorem. The direct torque control is very adapted for electric propulsion systems; we apply this new strategy for an 15 Kw induction motor. The proposed PI controllers are simulated in MATLAB SIMULINK environment. The simulation results confirmed that the NA-BACKSC, present robust and the best dynamic behavior on direct torque control compared to AF-PISC and CL-PISC.
    Źródło:
    Journal of Automation Mobile Robotics and Intelligent Systems; 2017, 11, 1; 57-63
    1897-8649
    2080-2145
    Pojawia się w:
    Journal of Automation Mobile Robotics and Intelligent Systems
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Analysis, Adaptive Control and Synchronization of a Novel 4-D Hyperchaotic Hyperjerk System via Backstepping Control Method
    Autorzy:
    Vaidyanathan, S.
    Powiązania:
    https://bibliotekanauki.pl/articles/229914.pdf
    Data publikacji:
    2016
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    hyperchaos
    hyperjerk system
    adaptive control
    backstepping control
    synchronization
    Opis:
    A hyperjerk system is a dynamical system, which is modelled by an nth order ordinary differential equation with n ≥ 4 describing the time evolution of a single scalar variable. Equivalently, using a chain of integrators, a hyperjerk system can be modelled as a system of n first order ordinary differential equations with n ≥ 4. In this research work, a 4-D novel hyperchaotic hyperjerk system with two nonlinearities has been proposed, and its qualitative properties have been detailed. The novel hyperjerk system has a unique equilibrium at the origin, which is a saddle-focus and unstable. The Lyapunov exponents of the novel hyperjerk system are obtained as L1 = 0.14219, L2 = 0.04605, L3 = 0 and L4 = −1.39267. The Kaplan-Yorke dimension of the novel hyperjerk system is obtained as DKY = 3.1348. Next, an adaptive controller is designed via backstepping control method to stabilize the novel hyperjerk chaotic system with three unknown parameters. Moreover, an adaptive controller is designed via backstepping control method to achieve global synchronization of the identical novel hyperjerk systems with three unknown parameters. MATLAB simulations are shown to illustrate all the main results derived in this research work on a novel hyperjerk system.
    Źródło:
    Archives of Control Sciences; 2016, 26, 3; 311-338
    1230-2384
    Pojawia się w:
    Archives of Control Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Enhanced Reliability for Winding Machine via New Fault Tolerant Control Based on RST-Backstepping Controller
    Autorzy:
    Haouari, Fouad
    Messekher, Salaheddine
    Bali, Noureddine
    Tadjine, Mohamed
    Boucherit, Mohamed Seghir
    Powiązania:
    https://bibliotekanauki.pl/articles/1955988.pdf
    Data publikacji:
    2021
    Wydawca:
    Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
    Tematy:
    winding machine
    fault tolerant control
    backstepping control
    RST control
    Opis:
    Due to the external disturbances, model uncertainties, strong coupling, and occurred faults, the winding machine presents a great control challenge. In order to deal with these problems, this paper presents the formulation of a novel scheme of fault tolerant control (FTC) for three-motor web-winding systems; it is concerned with the nonlinear robust backstepping control based on the combination of RST and backstepping controllers where the process is modelled by a nonlinear model. The main contribution of the paper is that the approach developed here summarises the performance of RST and backstepping controllers in order to design a robust controller capable of eliminating external disturbances and sensor faults affecting the system. The stability of the whole system is proven using the Lyapunov theory. Finally, analysis in comparison with the conventional backstepping controller and simulations in the MATLAB environment are accomplished to confirm the efficiency of the proposed method.
    Źródło:
    Power Electronics and Drives; 2021, 6, 41; 229-241
    2451-0262
    2543-4292
    Pojawia się w:
    Power Electronics and Drives
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Badanie i porównanie algorytmów LQR i backstepping do sterowania wahadła odwróconego z napędem inercyjnym
    Comparison of LQR control and nonlinear backstepping control using an inertia wheel pendulum
    Autorzy:
    Owczarkowski, A.
    Gośliński, J.
    Owczarek, P.
    Rybarczyk, D.
    Powiązania:
    https://bibliotekanauki.pl/articles/153666.pdf
    Data publikacji:
    2013
    Wydawca:
    Stowarzyszenie Inżynierów i Techników Mechaników Polskich
    Tematy:
    sterowanie nieliniowe
    backstepping
    LQR
    filtr Kalmana
    nonlinear control
    Kalman filter
    Opis:
    W artykule przedstawiono rezultaty działania sterowania liniowo-kwadratowego LQR (ang. Linear Quadratic Regulator) i nieliniowego backstepping na realnym obiekcie. Obiektem sterowania jest wahadło odwrócone z napędem inercyjnym (IWP - ang. Inertia Wheel Pendulum). Posiada ono dwa stopnie swobody: kąt odchylenia od pionu oraz kąt obrotu koła zamachowego. Wirującą masę napędza wysokomomentowy silnik umieszczony wewnątrz konstrukcji. Obiekt posiada mniej wymuszeń (jedno) niż stopni swobody (dwa) i dlatego nazywany jest underactuated. Celem układu regulacji jest utrzymywanie urządzenia w pozycji pionowej stanowiącej punkt równowagi. Zastosowano sterowanie nieliniowe backstepping. Kąt obrotu koła zamachowego mierzony jest przez enkoder inkrementalny. Do pomiaru poziomu odchylenia od pionu zastosowano jednostkę IMU (ang. Inertial Measurement Unit) zawierającą akcelerometr i żyroskop. Chcąc stworzyć efektywnie działającą fuzję sensoryczną, zastosowano filtrację Kalmana. Dzięki temu możliwe jest ustalenie odpowiedniego stopnia zaufania odpowiednim potokom pomiarowym i odfiltrowanie szkodliwych zakłóceń. Wykonano testy na obiekcie rzeczywistym i udowodniono poprawność działania zastosowanych algorytmów.
    This paper presents the results and comparison of linear quadratic control LQR and nonlinear backstepping on a real device. This device is the inverted pendulum driven by an accelerating inertia – inertia wheel pendulum. It has two degrees of freedom: the angle of inclination and the angle of rotation of the flywheel and one actuator – a high torque DC electric engine. Thus it is called underactuated. The purpose of the control system is to maintain the device in a vertical position which is the unstable equilibrium point. The angle of rotation of the flywheel is measured by an incremental encoder. To measure the angle from the vertical position, there was used the IMU (Inertial Measurement Unit) containing an accelerometer and a gyroscope. In order to create an effectively functioning sensory fusion, Kalman filtering was used. This made it possible to determine the appropriate level of trust for sensors and to filter out harmful noise. The correct effect of the used algorithms is presented.
    Źródło:
    Pomiary Automatyka Kontrola; 2013, R. 59, nr 10, 10; 1016-1019
    0032-4140
    Pojawia się w:
    Pomiary Automatyka Kontrola
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    A new multistable jerk chaotic system, its bifurcation analysis, backstepping control-based synchronization design and circuit simulation
    Autorzy:
    Vaidyanathan, Sundarapandian
    Benkouider, Khaled
    Sambas, Aceng
    Powiązania:
    https://bibliotekanauki.pl/articles/2106506.pdf
    Data publikacji:
    2022
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    chaos
    jerk systems
    bifurcation
    multistability
    attractors
    backstepping control
    circuit design
    Opis:
    In this work, we present results for a new dissipative jerk chaotic system with three quadratic terms in its dynamics.We describe the bifurcation analysis for the new jerk system and also show that the proposed system exhibits multi-stability. Next, we describe a backstepping control-based synchronization design for a pair of new jerk chaotic systems. MATLAB simulations are put forth to exhibit the various findings in this work. Furthermore, we exhibit a circuit simulation for the new jerk system using MultiSim.
    Źródło:
    Archives of Control Sciences; 2022, 32, 1; 123--152
    1230-2384
    Pojawia się w:
    Archives of Control Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    An observer for magnetic levitation system control based on a coefficient diagram method and backstepping
    Autorzy:
    Haouari, F.
    Bali, N.
    Tadjine, M.
    Boucherit, M. S.
    Powiązania:
    https://bibliotekanauki.pl/articles/141513.pdf
    Data publikacji:
    2018
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    backstepping
    coefficients diagram method controller
    magnetic levitation system
    nonlinear observer
    Opis:
    In this paper, we propose a robust nonlinear control design concept based on a coefficient diagram method and backstepping control, combined with a nonlinear observer for the magnetic levitation system to achieve precise position control in the existence of external disturbance, parameters mismatch with considerable variations and sensor noise in the case, where the full system states are supposed to be unavailable. The observer converges exponentially and leads to good estimate as well as a good track of the steel ball position with the reference trajectory. A simulation results are provided to show the excellent performance of the designed controller.
    Źródło:
    Archives of Electrical Engineering; 2018, 67, 2; 403--417
    1427-4221
    2300-2506
    Pojawia się w:
    Archives of Electrical Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Sensorless backstepping control using a Luenberger observer for double-star induction motor
    Autorzy:
    Chaabane, Hadji
    Eddine, Khodja Djalal
    Salim, Chakroune
    Powiązania:
    https://bibliotekanauki.pl/articles/141539.pdf
    Data publikacji:
    2020
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    backstepping control
    double star induction machine (DSIM) drive
    Luenberger observer
    Opis:
    In this paper, we propose sensorless backstepping control of a double-star induction machine (DSIM). First, the backstepping approach is designed to steer the flux and speed variables to their references and to compensate uncertainties. Lyapunov”s theory is used and it demonstrates that the dynamic tracking of trajectories tracking is asymptotically stable. Second, unfortunately, this law control called sophisticated is a major problem which leads to the necessity of using a mechanical sensor (speed, load torque). This imposes an additional cost and increases the complexity of the montage. In practice, this variable is unknown and its measurement is expensive. To restrain this problem we estimate speed and load torque by using a Luenberger observer (LO). Simulation results are provided to illustrate the performance of the proposed approach in high and low variable speeds and load torque disturbance.
    Źródło:
    Archives of Electrical Engineering; 2020, 69, 1; 101-116
    1427-4221
    2300-2506
    Pojawia się w:
    Archives of Electrical Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Dynamic variables limitation for backstepping control of induction machine and voltage source converter
    Autorzy:
    Morawiec, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/141291.pdf
    Data publikacji:
    2012
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    Zmienne dynamiczne ograniczenie
    power electronics converters
    backstepping control
    dynamic variables limitation
    Opis:
    The paper presents the method of control of an induction squirrel-cage machine supplied by a voltage source converter. The presented idea is based on an innovative method of the voltage source converter control, consisting in direct joining of the motor control system with the voltage source rectifier control system. The combined control system gives good dc-bus voltage stabilization. In the applied control system the limits of the reference variables have been introduced. A correction of the estimated machine load torque is proposed. The new proposed solutions are confirmed by mathematical dependences, simulation and experimental results.
    Źródło:
    Archives of Electrical Engineering; 2012, 61, 3; 389-410
    1427-4221
    2300-2506
    Pojawia się w:
    Archives of Electrical Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    A novel 3-D jerk chaotic system with three quadratic nonlinearities and its adaptive control
    Autorzy:
    Vaidyanathan, S.
    Powiązania:
    https://bibliotekanauki.pl/articles/229836.pdf
    Data publikacji:
    2016
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    dissipative chaotic system
    chaos
    chaotic system
    adaptive control
    backstepping control
    synchronization
    Opis:
    This paper announces an eight-term novel 3-D jerk chaotic system with three quadratic nonlinearities. The phase portraits of the novel jerk chaotic system are displayed and the qualitative properties of the jerk system are described. The novel jerk chaotic system has two equilibrium points, which are saddle-foci and unstable. The Lyapunov exponents of the novel jerk chaotic system are obtained as L1 = 0.20572, L2 = 0 and L3 = −1.20824. Since the sum of the Lyapunov exponents of the jerk chaotic system is negative, we conclude that the chaotic system is dissipative. The Kaplan-Yorke dimension of the novel jerk chaotic system is derived as DKY = 2.17026. Next, an adaptive controller is designed via backstepping control method to globally stabilize the novel jerk chaotic system with unknown parameters. Moreover, an adaptive controller is also designed via backstepping control method to achieve global chaos synchronization of the identical jerk chaotic systems with unknown parameters. The backstepping control method is a recursive procedure that links the choice of a Lyapunov function with the design of a controller and guarantees global asymptotic stability of strict feedback systems. MATLAB simulations have been depicted to illustrate the phase portraits of the novel jerk chaotic system and also the adaptive backstepping control results.
    Źródło:
    Archives of Control Sciences; 2016, 26, 1; 19-47
    1230-2384
    Pojawia się w:
    Archives of Control Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Stabilizacja pozycji i kierunku jednostki dynamicznie pozycjonowanej z niepewnościami parametrycznymi modelu i pomiarowymi
    Position and heading stabilization of DP vessel with parametric and measurement uncertainties
    Autorzy:
    Witkowska, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/267160.pdf
    Data publikacji:
    2015
    Wydawca:
    Politechnika Gdańska. Wydział Elektrotechniki i Automatyki
    Tematy:
    backstepping
    sterowanie adaptacyjne
    metoda Lapunowa
    adaptive control
    nonlinear control
    Lapunov method
    Opis:
    W praktyce, dynamika statku jak również zakłóceń środowiskowych oddziałujących na kadłub nie jest dokładnie znana, co wynika ze zmieniających się warunków eksploatacyjnych jednostki i stanów morza. W artykule przedstawiono zagadnienie projektowania regulatora pozycji i kursu statku z zastosowaniem algorytmu całkowania wstecz (ang. backstepping). W pracy rozważono układ dynamicznego pozycjonowania statku z niepewnościami parametrycznymi modelu oraz pomiarowymi. Niepewności parametryczne związane są z hydrodynamicznymi siłami tłumiącymi, natomiast pomiarowe z niemierzalną predkością statku. Porównano działanie układu adaptacyjnego zakładając występowanie niepewności oraz nieadaptacyjnego przy założeniu dokładnej znajomości modelu statku. Wyniki badań symulacyjnych wskazują zbliżone wyniki w obu rozpatrywanych przypadkach.
    In commercial Dynamic Positioning systems is still used PID control, despite a significant increase in the level of automation. To improve the quality of the positioning of the vessel may allow the use of more effective methods and algorithms, providing advanced nonlinear control techniques. The problem of synthesis a dynamic positioning system for surface vessel with uncertainties was considered in this paper. In practice, both the dynamics of a dynamically positioned vessel as well as environmental disturbances affecting on a hull are not precisely known, as a result of the changing operating conditions and the sea states. The article presents the problem of position and heading controller design by vectorial adaptive backstepping methods. The dynamic positioning vessel with parametric model uncertainties associated with hydrodynamic forces damping, low-speed ship and in the presence of waves disturbances was used. Comparison of the system with uncertainties and assuming precise knowledge of ship model was carried out. Finally simulations results demonstrate similar results in both cases. Adaptive controller follows desired trajectory with small neighborhood. All signals in the closed-loop DP control system are bounded.
    Źródło:
    Zeszyty Naukowe Wydziału Elektrotechniki i Automatyki Politechniki Gdańskiej; 2015, 47; 195-198
    1425-5766
    2353-1290
    Pojawia się w:
    Zeszyty Naukowe Wydziału Elektrotechniki i Automatyki Politechniki Gdańskiej
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Projective synchronization of chaotic systems via backstepping design
    Autorzy:
    Tarai, A.
    Khan, M. A.
    Powiązania:
    https://bibliotekanauki.pl/articles/266186.pdf
    Data publikacji:
    2013
    Wydawca:
    Uniwersytet Zielonogórski. Oficyna Wydawnicza
    Tematy:
    równanie Lyapunova
    projekt
    układ dynamiczny
    Lyapunov function
    projective synchronization
    backstepping
    design
    Opis:
    Chaos synchronization of discrete dynamical systems is investigated. An algorithm is proposed for projective synchronization of chaotic 2D Duffing map and chaotic Tinkerbell map. The control law was derived from the Lyapunov stability theory. Numerical simulation results are presented to verify the effectiveness of the proposed algorithm.
    Źródło:
    International Journal of Applied Mechanics and Engineering; 2013, 18, 3; 965-973
    1734-4492
    2353-9003
    Pojawia się w:
    International Journal of Applied Mechanics and Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Synchronization of neuronal bursting using backstepping control with recursive feedback
    Autorzy:
    Rasappan, Suresh
    Powiązania:
    https://bibliotekanauki.pl/articles/229893.pdf
    Data publikacji:
    2019
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    Hindmarsh-Rose neuronal bursting system
    chaos
    synchronization
    backstepping control
    Lyapunov
    stability
    Opis:
    J. L. Hindmarsh, R. M. Rose introduced the concept of neuronal burst. In this paper, synchronization is investigated for the construction of a model of neuronal burst using backstepping control with recursive feedback. Synchronization for a model of neuronal bursting system is established using Lyapunov stability theory. The backstepping scheme is a recursive procedure that links the choice of a Lyapunov function with the design of a controller. The backstepping control method is effective and convenient to synchronize identical systems. Numerical simulations are furnished to illustrate and validate the synchronization result derived in this paper.
    Źródło:
    Archives of Control Sciences; 2019, 29, 4; 617-642
    1230-2384
    Pojawia się w:
    Archives of Control Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Chaos in a simple snap system with only one nonlinearity, its adaptive control and real circuit design
    Autorzy:
    Pham, Viet-Thanh
    Vaidyanathan, Sundarapandian
    Volos, Christos
    Jafari, Sajad
    Alsaadi, Fawaz E.
    Alsaadi, Fuad E.
    Powiązania:
    https://bibliotekanauki.pl/articles/229990.pdf
    Data publikacji:
    2019
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    chaos
    chaotic systems
    hyperjerk systems
    adaptive control
    backstepping control
    circuit design
    Opis:
    We study an elegant snap system with only one nonlinear term, which is a quadratic nonlinearity. The snap system displays chaotic attractors, which are controlled easily by changing a system parameter. By using analysis, simulations and a real circuit, the dynamics of such a snap system has been investigated. We also investigate backstepping based adaptive control schemes for the new snap system with unknown parameters.
    Źródło:
    Archives of Control Sciences; 2019, 29, 1; 73-96
    1230-2384
    Pojawia się w:
    Archives of Control Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Adaptive backstepping control, synchronization and circuit simulation of a 3-D novel jerk chaotic system with two hyperbolic sinusoidal nonlinearities
    Autorzy:
    Vaidyanathan, S.
    Volos, C.
    Pham, V.-T.
    Madhavan, K.
    Idowu, B. A.
    Powiązania:
    https://bibliotekanauki.pl/articles/230036.pdf
    Data publikacji:
    2014
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    chaos
    jerk system
    novel system
    adaptive control
    backstepping control
    chaos synchronization
    Opis:
    In this research work, a six-term 3-D novel jerk chaotic system with two hyperbolic sinusoidal nonlinearities has been proposed, and its qualitative properties have been detailed. The Lyapunov exponents of the novel jerk system are obtained as L1 = 0.07765,L2 = 0, and L3 = −0.87912. The Kaplan-Yorke dimension of the novel jerk system is obtained as DKY = 2.08833. Next, an adaptive backstepping controller is designed to stabilize the novel jerk chaotic system with two unknown parameters. Moreover, an adaptive backstepping controller is designed to achieve complete chaos synchronization of the identical novel jerk chaotic systems with two unknown parameters. Finally, an electronic circuit realization of the novel jerk chaotic system using Spice is presented in detail to confirm the feasibility of the theoretical model.
    Źródło:
    Archives of Control Sciences; 2014, 24, 3; 375-403
    1230-2384
    Pojawia się w:
    Archives of Control Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Hybrid synchronization of n-scroll Chua and Lur’e chaotic systems via backstepping control with novel feedback
    Autorzy:
    Suresh, R.
    Sundarapandian, V.
    Powiązania:
    https://bibliotekanauki.pl/articles/229485.pdf
    Data publikacji:
    2012
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    chaos
    hybrid synchronization
    n-scroll Chua system
    Lur'e system
    backstepping control
    Opis:
    This paper investigates the backstepping control design with novel feedback input approach for controlling chaotic systems to guarantee the complete synchronization as well as the anti-synchronization of chaotic systems, viz. n-scroll Chua (K. Wallace et.al. 2001) and Lur’e chaotic systems. Our theorems on hybrid synchronization for n-scroll Chua and Lur’e (J.Suyken et.al. 1997) chaotic systems is established using Lyapunov stability theory. Based on the Lyapunov function, the backstepping control is determined to tune the controller gain based on the precalculated feedback control inputs. The backstepping scheme is recursive procedure that links the choice of a Lyapunov function with the design of a controller and guarantees global stability performance of strict-feedback chaotic systems. Since the Lyapunov exponents are not required for these calculations, the backstepping control method is effective and convenient to synchronize the chaotic systems. Mainly this technique gives the flexibility to construct a control law. Numerical simulations are also given to illustrate and validate the hybrid synchronization results derived in this paper.
    Źródło:
    Archives of Control Sciences; 2012, 22, 3; 343-365
    1230-2384
    Pojawia się w:
    Archives of Control Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The non-orthogonal Serret-Frenet parametrization applied to the path following problem of a manipulator with partially known dynamics
    Autorzy:
    Mazur, Alicja
    Dyba, Filip
    Powiązania:
    https://bibliotekanauki.pl/articles/27312013.pdf
    Data publikacji:
    2023
    Wydawca:
    Polska Akademia Nauk. Czasopisma i Monografie PAN
    Tematy:
    backstepping integrator algorithm
    holonomic manipulator
    non-orthogonal projection
    path following
    Serret-Frenet parametrization
    Opis:
    In this paper an application of the Serret-Frenet parametrization of a curve to the path following task is presented. This curvilinear parametrization method is used to obtain a control object description relative to the desired curve defined in the three-dimensional space. In order to derive proper equations, the innovative approach of the non-orthogonal projection of a control object on the given path is investigated. The non-orthogonal projection allows to design a global control algorithm. The proposed solution results in a cascade structure of the control system. Thus, the backstepping integrator algorithm was applied to create a control law. Due to the partial knowledge of control object dynamic parameters, an adaptive algorithm is taken into account. Theoretical considerations are confirmed with simulation study. Conducted simulations illustrated following paths at different levels of complexity by a holonomic non-redundant manipulator with a fixed base.
    Źródło:
    Archives of Control Sciences; 2023, 33, 2; 339--370
    1230-2384
    Pojawia się w:
    Archives of Control Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Research on disturbance rejection control strategy of vehicle drive axle loading test bench
    Autorzy:
    Yu, Hui
    Wang, Hui
    Li, Nanqi
    Zhao, Guochao
    Powiązania:
    https://bibliotekanauki.pl/articles/2086968.pdf
    Data publikacji:
    2022
    Wydawca:
    Polskie Towarzystwo Mechaniki Teoretycznej i Stosowanej
    Tematy:
    loading test-bed
    disturbance
    adaptive backstepping sliding mode control
    overshoot
    sinusoidal tracking error
    Opis:
    Aiming at the problems of parameter disturbance and coupling disturbance in a vehicle drive axle loading test-bed, this paper used the adaptive backstepping sliding mode control (ABSMC) strategy to design the controller for the speed and torque system. The effectiveness of the controller has been verified by simulation and an experiment. The results show that the equivalent moment of inertia is increased by 5 times, and the step response overshoot of the speed system is 4.1%. By adding a random disturbance, the sinusoidal tracking errors of the speed and torque systems are 0.05 r/min and 0.09Nm, respectively.
    Źródło:
    Journal of Theoretical and Applied Mechanics; 2022, 60, 2; 227--238
    1429-2955
    Pojawia się w:
    Journal of Theoretical and Applied Mechanics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    A 4-D chaotic hyperjerk system with a hidden attractor, adaptive backstepping control and circuit design
    Autorzy:
    Vaidyanathan, S.
    Jafari, S.
    Pham, V.-T.
    Azar, A. T.
    Alsaadi, F. E.
    Powiązania:
    https://bibliotekanauki.pl/articles/229776.pdf
    Data publikacji:
    2018
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    chaos
    chaotic systems
    hyperjerk systems
    hidden attractors
    adaptive control
    backstepping control
    circuit design
    Opis:
    A novel 4-D chaotic hyperjerk system with four quadratic nonlinearities is presented in this work. It is interesting that the hyperjerk system has no equilibrium. A chaotic attractor is said to be a hidden attractor when its basin of attraction has no intersection with small neighborhoods of equilibrium points of the system. Thus, our new non-equilibrium hyperjerk system possesses a hidden attractor. Chaos in the system has been observed in phase portraits and verified by positive Lyapunov exponents. Adaptive backstepping controller is designed for the global chaos control of the non-equilibrium hyperjerk system with a hidden attractor. An electronic circuit for realizing the non-equilibrium hyperjerk system is also introduced, which validates the theoretical chaotic model of the hyperjerk system with a hidden chaotic attractor.
    Źródło:
    Archives of Control Sciences; 2018, 28, 2; 239-254
    1230-2384
    Pojawia się w:
    Archives of Control Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Backstepping/DTC control of a double star synchronous machine drive
    Autorzy:
    Boudana, D.
    Nezli, L.
    Tlemcani, A.
    Mahmoudi, M. O.
    Djemai, M.
    Tadjine, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/229805.pdf
    Data publikacji:
    2010
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    double star synchronous machine
    direct torque control
    backstepping/DTC
    space vector modulation
    robustness
    Opis:
    Direct torque control (DTC) allows for very high quality torque control without a need for current controllers tuning or using coordinate transformation. However, barge torque ripples arise as well as inconstant inverter switching frequency due to the hysteresis of comparators. This paper present a backstepping/DTC control based on the space vector modulation (SVPWM) for double star synchronous machine (DSSM) to reduce the torque, flux, current and speed pulsations during steady state. By the coordinate transformation the DSSM models are presented in view of control. Then a conventional DTC is developed to get a decoupled system and a PI controller is designed to control the speed. To improve the static and dynamic control performance of the DSSM, the speed controller is designed using a backstepping/DTC procedure in conjunction with SVPWM. Simulation results with the conventional DTC and proposed backstepping/DTC are presented and compared. Results show the effectiveness and the robustness of the approach proposed.
    Źródło:
    Archives of Control Sciences; 2010, 20, 2; 227-247
    1230-2384
    Pojawia się w:
    Archives of Control Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    A new 3-D jerk chaotic system with two cubic nonlinearities and its adaptive backstepping control
    Autorzy:
    Vaidyanathan, S.
    Powiązania:
    https://bibliotekanauki.pl/articles/229916.pdf
    Data publikacji:
    2017
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    chaos
    chaotic systems
    jerk systems
    chaos control
    adaptive control
    backstepping control
    synchronization
    Opis:
    This paper presents a new seven-term 3-D jerk chaotic system with two cubic nonlinearities. The phase portraits of the novel jerk chaotic system are displayed and the qualitative properties of the jerk system are described. The novel jerk chaotic system has a unique equilibrium at the origin, which is a saddle-focus and unstable. The Lyapunov exponents of the novel jerk chaotic system are obtained as L1 = 0:2974, L2 = 0 and L3 = −3:8974. Since the sum of the Lyapunov exponents of the jerk chaotic system is negative, we conclude that the chaotic system is dissipative. The Kaplan-Yorke dimension of the new jerk chaotic system is found as DKY = 2:0763. Next, an adaptive backstepping controller is designed to globally stabilize the new jerk chaotic system with unknown parameters. Moreover, an adaptive backstepping controller is also designed to achieve global chaos synchronization of the identical jerk chaotic systems with unknown parameters. The backstepping control method is a recursive procedure that links the choice of a Lyapunov function with the design of a controller and guarantees global asymptotic stability of strict feedback systems. MATLAB simulations are shown to illustrate all the main results derived in this work.
    Źródło:
    Archives of Control Sciences; 2017, 27, 3; 409-439
    1230-2384
    Pojawia się w:
    Archives of Control Sciences
    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:
    Robust Back-stepping Based Higher Order Sliding Mode Control of Non-Inverted Buck-Boost Converter for a Photovoltaic System
    Autorzy:
    Ullah, Shaukat
    Powiązania:
    https://bibliotekanauki.pl/articles/1955975.pdf
    Data publikacji:
    2021
    Wydawca:
    Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
    Tematy:
    MPPT
    buck-boost converter
    non-linear control
    backstepping
    higher order sliding
    photovoltaic PV
    Opis:
    Photovoltaic (PV) system generates renewable energy from sunlight, which has low efficiency due to the variance in nature of temperature and irradiance in a fast changing environment condition. Different researchers have proposed different maximum power point tracking MPPT techniques to improve the efficiency. However, still there are many open issues. Thus, to address this, a non-linear back-stepping-based higher order sliding mode controller (BHOSMC) is proposed to harvest maximum power from PV system. The PV module and load is interfaced by a non-inverted buck-boost converter (NIBBC). A linear interpolation method is used for voltage generation and Lyapunov stability is used to verify the control system equation. MATLAB/Simulink software is used for testing the proposed controller performance. The experimental result verified that the proposed BHOSMC is robust, accurate and fast tracking, faultless and less chattering as compared to perturb and observe (P&O), back-stepping control (BSC) and back-stepping-based sliding mode control under rapidly varying meteorological condition.
    Źródło:
    Power Electronics and Drives; 2021, 6, 41; 113-127
    2451-0262
    2543-4292
    Pojawia się w:
    Power Electronics and Drives
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Reduced order hybrid function projective combination synchronization of three Josephson junctions
    Autorzy:
    Ojo, K. S.
    Njah, A. N.
    Ogunjo, S. T.
    Olusola, O. I.
    Powiązania:
    https://bibliotekanauki.pl/articles/229696.pdf
    Data publikacji:
    2014
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    function projective synchronization
    Josephson junction
    backstepping control
    chaos
    reduced order synchronization
    combination synchronization
    Opis:
    In this paper, we examine reduced order hybrid function projective combination synchronization of three chaotic systems consisting of: (i) two third chaotic Josephson junctions as drives and one second order chaotic Josephson junction as response system; (ii) one third order chaotic Josephson junction as the drive and two second order chaotic Josephson junctions as the slaves using active backstepping technique. The analytic results confirm the realization of reduced order hybrid function projective combination synchronization using active backstepping technique. Numerical simulations are performed to validate the analytical results.
    Źródło:
    Archives of Control Sciences; 2014, 24, 1; 99-113
    1230-2384
    Pojawia się w:
    Archives of Control Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    A new modified WINDMI jerk system with exponential and sinusoidal nonlinearities, its bifurcation analysis, multistability, circuit simulation and synchronization design
    Autorzy:
    Mohamed, Mohamad Afendee
    Vaidyanathan, Sundarapandian
    Hannachi, Fareh
    Sambas, Aceng
    Darwin, P.
    Powiązania:
    https://bibliotekanauki.pl/articles/27324008.pdf
    Data publikacji:
    2023
    Wydawca:
    Polska Akademia Nauk. Czasopisma i Monografie PAN
    Tematy:
    chaos
    jerk systems
    chaotic systems
    Lyapunov exponents
    bifurcation
    multistability
    circuit simulation
    backstepping control
    Opis:
    In this work, a new 3-D modified WINDMI chaotic jerk system with exponential and sinusoidal nonlinearities is presented and its dynamical behaviours and properties are investigated. Firstly, some properties of the system are studied such as equilibrium points and their stability, Lyapunov exponents and Kaplan-Yorke dimension. Also, we study the new jerk system dynamics using numerical simulations and analyses, including phase portraits, Lyapunouv exponent spectrum, bifurcation diagram and Poincaré map, 0-1 test. Next, we exhibit that the new 3-D chaotic modified WINDMI jerk system has multistability with coexisting chaotic attractors. Moreover, we design an electronic circuit using MultiSim 14.1 for real implementation of the modified WINDMI chaotic jerk system. Finally, we design an active synchronization scheme for the complete synchronization of the modified WINDMI chaotic jerk systems via backstepping control.
    Źródło:
    Archives of Control Sciences; 2023, 33, 4; 711--735
    1230-2384
    Pojawia się w:
    Archives of Control Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Realizacja adaptacyjnego algorytmu wstecznego całkowania w układzie sterowania poziomem cieczy
    Realization of adaptive backstepping algorithm in level control system
    Autorzy:
    Jastrzębski, M.
    Król, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/155310.pdf
    Data publikacji:
    2012
    Wydawca:
    Stowarzyszenie Inżynierów i Techników Mechaników Polskich
    Tematy:
    adaptacyjny algorytm wstecznego całkowania
    rozproszony system sterowania (DCS)
    adaptive backstepping
    distributed control system (DCS)
    Opis:
    Artykuł dotyczy realizacji adaptacyjnego algorytmu wstecznego całkowania w czasie rzeczywistym, w układzie sterowania o konfiguracji rozproszonej. Przedstawiono ideę, rozwój oraz strukturę adaptacyjnego algorytmu wstecznego całkowania (ang. adaptive backstepping). Wyprowadzono prawo sterowania i zamieszczono badania symulacyjne dla zadania stabilizacji poziomu cieczy w kaskadowo połączonym układzie zbiorników. Wyniki otrzymane w układzie rzeczywistym pokazują efektywność działania zrealizowanego algorytmu i potwierdzają celowość jego implementacji na regulatorze DCS.
    The paper presents results of implementation of an adaptive backstepping algorithm for controller design in a distributed control system (DCS). The first part (Section 1) describes the idea the of adaptive backstepping algorithm [7, 8]. The next section presents the controlled system described by Eqs. (1, 2) (Fig. 1) and a control algorithm (3-16) stabilizing the liquid level x2 on setpoint y. The Lyapunov method was used for deriving control laws. The complete control algorithm with parameter adaptation rules for adjustment of the valves characteristics (Fig. 2) is given by (17-22, 24). Parameters k1 and k2 used in the algorithm were tuned in Simulink. The simulation results are shown in Figs. 3, 4. The real time results (Figs. 5, 6) prove the algorithm effectiveness and confirm usability of its implementation in a DCS controller. The Simulink file, the control program for a controller VE3006 realized in the environment DeltaV (fhx) and screen shots showing that implementation of the described control is not a difficult task, are available at: http://zts.p.lodz.pl/zasoby/marcinjastrzebski/pak2011.zip.
    Źródło:
    Pomiary Automatyka Kontrola; 2012, R. 58, nr 3, 3; 284-287
    0032-4140
    Pojawia się w:
    Pomiary Automatyka Kontrola
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Designing a ship course controller by applying the adaptive backstepping method
    Autorzy:
    Witkowska, A.
    Śmierzchalski, R.
    Powiązania:
    https://bibliotekanauki.pl/articles/331255.pdf
    Data publikacji:
    2012
    Wydawca:
    Uniwersytet Zielonogórski. Oficyna Wydawnicza
    Tematy:
    autopilot
    sterowanie adaptacyjne
    sterowanie nieliniowe
    algorytm genetyczny
    adaptive control
    nonlinear control
    backstepping
    genetic algorithms
    Opis:
    The article discusses the problem of designing a proper and efficient adaptive course-keeping control system for a seagoing ship based on the adaptive backstepping method. The proposed controller in the design stage takes into account the dynamic properties of the steering gear and the full nonlinear static maneuvering characteristic. The adjustable parameters of the achieved nonlinear control structure were tuned up by using the genetic algorithm in order to optimize the system performance. A realistic full-scale simulation model of the B-481 type vessel including wave and wind effects was applied to simulate the control algorithm by using time domain analysis.
    Źródło:
    International Journal of Applied Mathematics and Computer Science; 2012, 22, 4; 985-997
    1641-876X
    2083-8492
    Pojawia się w:
    International Journal of Applied Mathematics and Computer Science
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Method of cooperative formation control for underactuated USVs based on nonlinear backstepping and cascade system theory
    Autorzy:
    Dong, Zaopeng
    Liu, Yang
    Wang, Hao
    Qin, Tao
    Powiązania:
    https://bibliotekanauki.pl/articles/1573634.pdf
    Data publikacji:
    2021
    Wydawca:
    Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
    Tematy:
    unmanned surface vehicle (USV)
    cooperative formation control
    underactuated system
    nonlinear backstepping
    cascade system theory
    Opis:
    This paper presents a method for the cooperative formation control of a group of underactuated USVs. The problem of formation control is first converted to one of stabilisation control of the tracking errors of the follower USVs using system state transformation design. The followers must keep a fixed distance from the leader USV and a specific heading angle in order to maintain a certain type of formation. A global differential homeomorphism transformation is then designed to create a tracking error system for the follower USVs, in order to simplify the description of the control system. This makes the complex formation control system easy to analyse, and allows it to be decomposed into a cascaded system. In addition, several intermediate state variables and virtual control laws are designed based on nonlinear backstepping, and actual control algorithms for the follower USVs to control the surge force and yaw moment are presented. A global system that can ensure uniform asymptotic stability of the USVs’ cooperative formation control is achieved by combining Lyapunov stability theory and cascade system theory. Finally, several simulation experiments are carried out to verify the validity, stability and reliability of our cooperative formation control method.
    Źródło:
    Polish Maritime Research; 2021, 1; 149-162
    1233-2585
    Pojawia się w:
    Polish Maritime Research
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Modeling and Control of a 4-wheel Skid-steering Mobile Robot
    Autorzy:
    Kozłowski, K.
    Pazderski, D.
    Powiązania:
    https://bibliotekanauki.pl/articles/907961.pdf
    Data publikacji:
    2004
    Wydawca:
    Uniwersytet Zielonogórski. Oficyna Wydawnicza
    Tematy:
    robot mobilny
    backstepping
    analiza Lyapunova
    mobile robots
    skid-steering vehicles
    time-varying control laws
    Lyapunov analysis
    Opis:
    A mathematical model of a 4-wheel skid-steering mobile robot is presented in a systematic way. The robot is considered as a subsystem consisting of kinematic, dynamic and drive levels. Next, a designing process of a kinematic controller based on the algorithm introduced by (Dixon et al., 2001) is shown. An extension of the kinematic control law at the dynamic and motor levels using the Lyapunov analysis and the backstepping technique is developed. To validate the designed algorithm, extensive simulation results for trajectory tracking and set-point cases are discussed. Some deliberations concerning the tuning of the controller are presented, too.
    Źródło:
    International Journal of Applied Mathematics and Computer Science; 2004, 14, 4; 477-496
    1641-876X
    2083-8492
    Pojawia się w:
    International Journal of Applied Mathematics and Computer Science
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Robust adaptive fuzzy filters output feedback control of strict-feedback nonlinear systems
    Autorzy:
    Tong, S.
    Liu, C.
    Li, Y.
    Powiązania:
    https://bibliotekanauki.pl/articles/908148.pdf
    Data publikacji:
    2010
    Wydawca:
    Uniwersytet Zielonogórski. Oficyna Wydawnicza
    Tematy:
    system nieliniowy
    sterowanie rozmyte
    sprzężenie zwrotne
    nonlinear system
    adaptive fuzzy control
    backstepping
    small-gain approach
    K-filters
    Opis:
    In this paper, an adaptive fuzzy robust output feedback control approach is proposed for a class of single input single output (SISO) strict-feedback nonlinear systems without measurements of states. The nonlinear systems addressed in this paper are assumed to possess unstructured uncertainties, unmodeled dynamics and dynamic disturbances, where the unstructured uncertainties are not linearly parameterized, and no prior knowledge of their bounds is available. In recursive design, fuzzy logic systems are used to approximate unstructured uncertainties, and K-filters are designed to estimate unmeasured states. By combining backstepping design and a small-gain theorem, a stable adaptive fuzzy output feedback control scheme is developed. It is proven that the proposed adaptive fuzzy control approach can guarantee the all the signals in the closed-loop system are uniformly ultimately bounded, and the output of the controlled system converges to a small neighborhood of the origin. The effectiveness of the proposed approach is illustrated by a simulation example and some comparisons.
    Źródło:
    International Journal of Applied Mathematics and Computer Science; 2010, 20, 4; 637-653
    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:
    A comparative study based on proportional integral and backstepping controllers for doubly fed induction generator used in wind energy conversion system
    Autorzy:
    Moumani, Youssef
    Laafou, Abdeslam Jabal
    Madi, Abdessalam Ait
    Powiązania:
    https://bibliotekanauki.pl/articles/2202553.pdf
    Data publikacji:
    2023
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    backstepping control
    control
    Doubly FedInduction
    Grid Side Converter
    MPPT
    Maximum Power Point Tracking
    PI
    Rotor Side Converter
    wind turbine
    Opis:
    This paper presents a comparative study between the conventional PI (Proportional Integral) and backstepping controllers applied to the DFIG (Doubly Fed Induction Generator) used in WECS (Wind Energy Conversion System). These two different control strategies proposed in this work are developed to control the active and reactive power of the DFIG on the one hand, and to maintain the DC-link voltage constant for the inverting function on the other hand. This is ensured by generating control signals for two power electronic converters, RSC (Rotor Side Converter) and GSC (Grid Side Converter). In order to optimise the power production in the WT (Wind Turbine), an MPPT (Maximum Power Point Tracking) algorithm is applied along with each control technique. To simulate the effectiveness of the proposed controllers, MATLAB/Simulink Software is used, and the obtained results are analysed and discussed to compare PI and backstepping controllers in terms of robustness against wind speed variations and tracking performance in dynamic and steady states.
    Źródło:
    Archives of Electrical Engineering; 2023, 72, 1; 211--228
    1427-4221
    2300-2506
    Pojawia się w:
    Archives of Electrical Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Path following control of the underactuated USV based on the improved line-of-sight guidance algorithm
    Autorzy:
    Liu, T.
    Dong, Z.
    Du, H.
    Song, L.
    Mao, Y.
    Powiązania:
    https://bibliotekanauki.pl/articles/259559.pdf
    Data publikacji:
    2017
    Wydawca:
    Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
    Tematy:
    unmanned surface vessel (USV)
    path following control
    Serret-Frenet coordinate frame
    underactuated system
    improved lineof-sight guidance algorithm
    nonlinear backstepping method
    Opis:
    The path following control problem of the underactuated unmanned surface vessel (USV) is studied in this paper. An improved line-of-sight (LOS) guidance algorithm is proposed which can adjust adaptively based on the path following error. The global asymptotically stable path following controller is designed based on the nonlinear backstepping method and the Lyapunov stability theory. Firstly, the USV path following error model is established in the Serret-Frenet (SF) coordinate frame. The path following error in the inertial coordinate frame is transformed into the SF coordinate frame, which is used to define the path following control problem. Secondly, inspired by the traditional LOS guidance algorithm, the longitudinal path following error in the SF coordinate frame is introduced into the improved LOS guidance algorithm. This allows the algorithm to adjust adaptively to the desired path. Thirdly, in order to solve the underactuated problem of the USV path following control system, the tangential velocity of the desired path is designed as a virtual input. The underactuated problem is converted to a virtual fully actuated problem by designing the virtual control law for the tangential velocity. Finally, by combining backstepping design principles and the Lyapunov stability theory, the longitudinal thrust control law and the yaw torque control law are designed for the underactuated USV. Meanwhile, the global asymptotic stability of the path following error is proved. Simulation experiments demonstrate the effectiveness and reliability of the improved LOS guidance algorithm and the path following controller.
    Źródło:
    Polish Maritime Research; 2017, 1; 3-11
    1233-2585
    Pojawia się w:
    Polish Maritime Research
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Speed control of doubly fed induction motor using backstepping control with interval type-2 fuzzy controller
    Autorzy:
    Herizi, Abdelghafour
    Rouabhi, Riyadh
    Zemmit, Abderrahim
    Powiązania:
    https://bibliotekanauki.pl/articles/2232527.pdf
    Data publikacji:
    2023
    Wydawca:
    Polska Akademia Nauk. Polskie Towarzystwo Diagnostyki Technicznej PAN
    Tematy:
    double fed induction motor
    type-2 fuzzy logic
    backstepping control
    hybrid control
    robust
    silnik indukcyjny
    logika rozmyta typu 2
    kontrola wsteczna
    sterowanie hybrydowe
    Opis:
    The control of the doubly-fed induction motor is a complex operation because of this motor characterised by a non-linear multivariable dynamics, having settings that change over time and a significant link between the mechanical component and magnetic behavior (flux) (speed and couple). This article then proposes a new strategy of a robust control of this motor, which is decoupled due to the stator flux’s direction. The proposed control is integrated with the backstepping control which based on Lyapunov theory; this approach consists in constructively designing a control law of nonlinear systems by considering some state variables as being virtual commands, and the important branch of artificial intelligence type-2 fuzzy logic. The hybrid control backstepping-fuzzy logic consists in replacing the regulators applied to the backstepping control by regulators based on type-2 fuzzy logic. This control will be evaluated by numerous simulations where there is a parametric and non-parametric variation.
    Źródło:
    Diagnostyka; 2023, 24, 3; art. no. 2023301
    1641-6414
    2449-5220
    Pojawia się w:
    Diagnostyka
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Design of new robust backstepping control for three-phase grid-connected fourleg source voltage PWM converters
    Autorzy:
    Chebabhi, Ali
    Kessal, Abdelhalim
    Powiązania:
    https://bibliotekanauki.pl/articles/2203363.pdf
    Data publikacji:
    2023
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    three-phase grid-connected four-leg voltage source rectifiers
    GC-FLVSR
    Robust Backstepping Control
    RBSC
    parameters uncertainties
    harmonic
    Zero Sequence Currents
    ZSCs
    Unit Power Factor
    UPF
    Opis:
    Due to high performance demands of grid-connected pulse-width modulation (PWM) converters in power applications, backstepping control (BSC) has drawn wide research interest for its advantages, including high robustness against parametric variations and external disturbances. In order to guarantee these advantages while providing high static and dynamic responses, in this work, a robust BSC (RBSC) with consideration of grid-connected PWM converter parameter uncertainties is proposed for three-phase grid-connected four-leg voltage source rectifiers (GC-FLVSR). The proposed RBSC for GC-FLVSR is composed of four independent controllers based on the Lyabonov theory that control DC bus voltage and input currents simultaneously. As a result, unit power factor, stable DC-bus voltage, sinusoidal four-leg rectifier input currents with lower harmonics and zero-sequence (ZS), and natural currents can be accurately achieved. Furthermore, the stability and robustness against load, DC capacitor, and filter inductance variations can be tested. The effectiveness and superiority of the proposed RBSC compared to the PI control (PIC) have been validated by processor-in-the-loop (PIL) co-simulation using the STM32F407 discovery-development-board as an experimental study.
    Źródło:
    Metrology and Measurement Systems; 2023, 30, 1; 65--82
    0860-8229
    Pojawia się w:
    Metrology and Measurement Systems
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Robust estimation based nonlinear higher order sliding mode control strategies for PMSG-WECS
    Autorzy:
    Nazir, Awais
    Khan, Safdar Abbas
    Khan, Malak Adnan
    Alam, Zaheer
    Khan, Imran
    Irfan, Muhammad
    Rehman, Saifur
    Nowakowski, Grzegorz
    Powiązania:
    https://bibliotekanauki.pl/articles/27311430.pdf
    Data publikacji:
    2023
    Wydawca:
    Polska Akademia Nauk. Czasopisma i Monografie PAN
    Tematy:
    wind energy conversion systems
    WECS
    robust control
    maximum power point tracking
    MPPT
    sliding mode control
    SMC
    super-twisting algorithm
    STA
    high gain observer
    artificial neural network
    ANN
    function fitting
    backstepping
    śledzenie maksymalnego punktu mocy
    obserwator o dużym wzmocnieniu
    sztuczna sieć neuronowa
    dopasowanie funkcji
    system konwersji energii wiatrowej
    sterowanie odporne
    sterowanie ślizgowe
    algorytm super skręcania
    Opis:
    The wind energy conversion systems (WECS) suffer from an intermittent nature of source (wind) and the resulting disparity between power generation and electricity demand. Thus, WECS are required to be operated at maximum power point (MPP). This research paper addresses a sophisticated MPP tracking (MPPT) strategy to ensure optimum (maximum) power out of the WECS despite environmental (wind) variations. This study considers a WECS (fixed pitch, 3KW, variable speed) coupled with a permanent magnet synchronous generator (PMSG) and proposes three sliding mode control (SMC) based MPPT schemes, a conventional first order SMC (FOSMC), an integral back-stepping-based SMC (IBSMC) and a super-twisting reachability-based SMC, for maximizing the power output. However, the efficacy of MPPT/control schemes rely on availability of system parameters especially, uncertain/nonlinear dynamics and aerodynamic terms, which are not commonly accessible in practice. As a remedy, an off-line artificial function-fitting neural network (ANN) based on Levenberg-Marquardt algorithm is employed to enhance the performance and robustness of MPPT/control scheme by effectively imitating the uncertain/nonlinear drift terms in the control input pathways. Furthermore, the speed and missing derivative of a generator shaft are determined using a high-gain observer (HGO). Finally, a comparison is made among the stated strategies subjected to stochastic and deterministic wind speed profiles. Extensive MATLAB/Simulink simulations assess the effectiveness of the suggested approaches.
    Źródło:
    Bulletin of the Polish Academy of Sciences. Technical Sciences; 2023, 71, 5; art. no. e147063
    0239-7528
    Pojawia się w:
    Bulletin of the Polish Academy of Sciences. Technical Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-46 z 46

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