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    Wyświetlanie 1-25 z 25
    Tytuł:
    The design of ship autopilot by applying observer – based feedback linearization
    Autorzy:
    Zwierzewicz, Z.
    Powiązania:
    https://bibliotekanauki.pl/articles/259972.pdf
    Data publikacji:
    2015
    Wydawca:
    Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
    Tematy:
    ship autopilot design
    feedback linearization
    nonlinear observer
    Opis:
    The paper considers the problem of ship autopilot design based on Bech’s model of the vessel. Since the model is highly nonlinear and some of the state vector coordinates are unavailable, the control system synthesis is performed by means of an output feedback linearization method combined with a nonlinear observer. The asymptotic stability of the overall system has been proven, including the asymptotic stability of the system internal dynamics. The performed simulations of the ship course-changing process have confirmed a high performance of the proposed controller. It has been emphasized that for its practical usability the system robustification is necessary.
    Źródło:
    Polish Maritime Research; 2015, 1; 16-21
    1233-2585
    Pojawia się w:
    Polish Maritime Research
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Global rational stabilization of a class of nonlinear time-delay systems
    Autorzy:
    Echi, Nadhem
    Ghanmi, Boulbaba
    Powiązania:
    https://bibliotekanauki.pl/articles/229187.pdf
    Data publikacji:
    2019
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    rational stability
    delay system
    nonlinear observer
    Lyapunov functional
    Opis:
    The present paper is mainly aimed at introducing a novel notion of stability of nonlinear time-delay systems called Rational Stability. According to the Lyapunov-type, various sufficient conditions for rational stability are reached. Under delay dependent conditions, we suggest a nonlinear time-delay observer to estimate the system states, a state feedback controller and the observer-based controller rational stability is provided. Moreover, global rational stability using output feedback is given. Finally, the study presents simulation findings to show the feasibility of the suggested strategy.
    Źródło:
    Archives of Control Sciences; 2019, 29, 2; 259-278
    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:
    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:
    Analiza nieliniowego obserwatora i filtru cząsteczkowego jako estymatorów pozycji statku
    Enhancement of posiotioning estimation of vessel
    Autorzy:
    Jaroś, K.
    Witkowska, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/267170.pdf
    Data publikacji:
    2015
    Wydawca:
    Politechnika Gdańska. Wydział Elektrotechniki i Automatyki
    Tematy:
    Nieliniowy model statku
    Particle Filter
    Nieliniowy obserwator
    Nonlinear observer
    Particle Filtering
    Opis:
    W artykule została przedstawiona analiza porównawcza dokonana pomiędzy dwoma estymatorami pozycji. Analiza ta została przedstawiona na podstawie różnicy pomiędzy wartością estymowaną a rzeczywistą. Badania estymatorów zostały przeprowadzone na podstawie równania kinematyki i dynamiki statku dynamicznie pozycjonowanego. Wartościami wykorzystywanymi w symulacji są pomiary z symulowanego odbiornika GPS i siły wytworzone przez napędy statku w czasie wykonywania manewrów. W artykule zawarto nieliniowy model statku z zakłóceniami w globalnym układzie współrzędnych, oraz dwa estymatory nieliniowy obserwator (NO) i filtr cząsteczkowy (PF) (ang. Particle filter). Badania zostały przeprowadzone w środowisku MATLAB/Simulink z użyciem modeli symulacyjnych. W badaniach wykazano że PF jest lepszym estymatorem niż NO podczas manewru zmiany pozycji statku natomiast sytuacja jest odwrotna podczas utrzymywania stałej pozycji statku.
    An estimation of measured variables is very important in dynamic positioning systems of the vessels. There is required to a filtering of the signal environmental noise and the measurements noises to get high-precision estimate of the vessel’s position. The dynamic positioning systems uses a different algorithms for estimating and filtering measured signals. More suitable algorithms of estimating and filtering, allows to obtain an accurate control of the vessel’s position at sea, in seaports and near oil rigs. It improve safety level and decrease fuel consumption. That is the reason why many evaluations and investigations of estimation parameter. The goal of research, described in the paper is which of estimator is most suitable estimation of the vessel’s position. In this paper used three estimator to compare which of this estimation give the better solution in different tasks in dynamic positioning system. To comparison filters in this paper used simulation where the vessel has been used to different tasks. Ship model simulates the signal from the GPS receiver with disturbances and provides information about the force generated by the propellers. These values was used to estimation position of vessel. Studies have shown that PF is a better estimator than NO by tracking the position of a time-varying but the opposite is true for estimating the position of the invariant over time.
    Źródło:
    Zeszyty Naukowe Wydziału Elektrotechniki i Automatyki Politechniki Gdańskiej; 2015, 47; 71-74
    1425-5766
    2353-1290
    Pojawia się w:
    Zeszyty Naukowe Wydziału Elektrotechniki i Automatyki Politechniki Gdańskiej
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Range Identification for a Perspective Dynamic System with a Single Homogeneous Observation
    Autorzy:
    Ma, L.
    Chen, Y.
    Moore, K. L.
    Powiązania:
    https://bibliotekanauki.pl/articles/908492.pdf
    Data publikacji:
    2005
    Wydawca:
    Uniwersytet Zielonogórski. Oficyna Wydawnicza
    Tematy:
    system identyfikacji
    układ dynamiczny
    obserwator nieliniowy
    range identification
    perspective dynamic systems
    nonlinear observer
    Opis:
    Perspective problems arise in machine vision when using a camera to observe the scene. Essential problems include the identification of unknown states and/or unknown parameters from perspective observations. Range identification is used to estimate the states/positions of a moving object with known motion parameters. Range estimation has been discussed in the literature using nonlinear observers with full homogeneous observations derived from the image plane. In this paper, the same range identification problem is discussed with a single homogeneous observation using nonlinear observers. Our simulation results verify the convergence of the observers when their observability conditions are satisfied.
    Źródło:
    International Journal of Applied Mathematics and Computer Science; 2005, 15, 1; 63-72
    1641-876X
    2083-8492
    Pojawia się w:
    International Journal of Applied Mathematics and Computer Science
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Powerful nonlinear observer associated with field-oriented control of an induction motor
    Autorzy:
    Mansouri, A.
    Chenafa, M.
    Bouhenna, A.
    Etien, E.
    Powiązania:
    https://bibliotekanauki.pl/articles/907397.pdf
    Data publikacji:
    2004
    Wydawca:
    Uniwersytet Zielonogórski. Oficyna Wydawnicza
    Tematy:
    silnik indukcyjny
    obserwator nieliniowy
    rezystancja wirnika
    induction motor
    field-oriented control
    nonlinear observer
    rotor resistance
    Opis:
    In this paper, we associate field-oriented control with a powerful nonlinear robust flux observer for an induction motor to show the improvement made by this observer compared with the open-loop and classical estimator used in this type of control. We implement this design strategy through an extension of a special class of nonlinear multivariable systems satisfying some regularity assumptions. We show by an extensive study that this observer is completely satisfactory at low and nominal speeds and it is not sensitive to disturbances and parametric errors. It is robust to changes in load torque, rotational speed and rotor resistance. The method achieves a good performance with only one easier gain tuning obtained from an algebraic Lyapunov equation. Finally, we present results and simulations with concluding remarks on the advantages and perspectives for the observer proposed with the field-oriented control.
    Źródło:
    International Journal of Applied Mathematics and Computer Science; 2004, 14, 2; 209-220
    1641-876X
    2083-8492
    Pojawia się w:
    International Journal of Applied Mathematics and Computer Science
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Global Stability of Linearizing Control With a New Robust Nonlinear Observer of The Induction Motor
    Autorzy:
    Chenafa, M.
    Mansouri, A.
    Bouhenna, A.
    Etien, E.
    Belaidi, A.
    Denai, M. A.
    Powiązania:
    https://bibliotekanauki.pl/articles/911129.pdf
    Data publikacji:
    2005
    Wydawca:
    Uniwersytet Zielonogórski. Oficyna Wydawnicza
    Tematy:
    obserwatory nieliniowe
    sterowanie liniowe
    silnik indukcyjny
    stabilność globalna
    nonlinear observer
    linearizing control
    induction motor
    global stability
    Opis:
    This paper mainly deals with the design of an advanced control law with an observer for a special class of nonlinear systems. We design an observer with a gain as a function of speed. We study the solution to the output feedback torque and rotor flux-tracking problem for an induction motor model given in the natural frame. We propose a new robust nonlinear observer and prove the global stability of the interlaced controller-observer system. The control algorithm is studied through simulations and applied in many configurations (various set points, flux and speed profiles and torque disturbances), and is shown to be very efficient.
    Źródło:
    International Journal of Applied Mathematics and Computer Science; 2005, 15, 2; 235-243
    1641-876X
    2083-8492
    Pojawia się w:
    International Journal of Applied Mathematics and Computer Science
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Adaptive observer-based fault estimation for a class of Lipschitz nonlinear systems
    Autorzy:
    Oucief, N.
    Tadjine, M.
    Labiod, S.
    Powiązania:
    https://bibliotekanauki.pl/articles/229517.pdf
    Data publikacji:
    2016
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    nonlinear adaptive observer
    fault estimation
    strictly positive real
    Lipschitz systems
    observer matching condition
    LMI
    Opis:
    Fault input channels represent a major challenge for observer design for fault estimation. Most works in this field assume that faults enter in such a way that the transfer functions between these faults and a number of measured outputs are strictly positive real (SPR), that is, the observer matching condition is satisfied. This paper presents a systematic approach to adaptive observer design for joint estimation of the state and faults when the SPR requirement is not verified. The proposed method deals with a class of Lipschitz nonlinear systems subjected to piecewise constant multiplicative faults. The novelty of the proposed approach is that it uses a rank condition similar to the observer matching condition to construct the adaptation law used to obtain fault estimates. The problem of finding the adaptive observer matrices is formulated as a Linear Matrix Inequality (LMI) optimization problem. The proposed scheme is tested on the nonlinear model of a single link flexible joint robot system.
    Źródło:
    Archives of Control Sciences; 2016, 26, 2; 245-259
    1230-2384
    Pojawia się w:
    Archives of Control Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    An improved dynamic surface sliding mode method for autonomous cooperative formation control of underactuated USVS with complex marine environment disturbances
    Autorzy:
    Dong, Zaopeng
    Qi, Shijie
    Yu, Min
    Zhang, Zhengqi
    Zhang, Haisheng
    Li, Jiakang
    Liu, Yang
    Powiązania:
    https://bibliotekanauki.pl/articles/32909478.pdf
    Data publikacji:
    2022
    Wydawca:
    Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
    Tematy:
    underactuated USV
    dynamic surface sliding mode control
    lateral velocity tracking differentiator
    nonlinear disturbance observer
    Opis:
    In this paper, a novel dynamic surface sliding mode control (DSSMC) method, combined with a lateral velocity tracking differentiator (LVTD), is proposed for the cooperative formation control of underactuated unmanned surface vehicles (USVs) exposed to complex marine environment disturbances. Firstly, in view of the kinematic and dynamic models of USVs and the design idea of a virtual control law in a backstepping approach, the trajectory tracking control problem of USVs’ cooperative formation is transformed into a stabilisation problem of the virtual control law of longitudinal and lateral velocities. Then, aiming at the problem of differential explosion caused by repeated derivation in the process of backstepping design, the first-order low-pass filter about the virtual longitudinal velocity and intermediate state quantity of position is constructed to replace differential calculations during the design of the control law, respectively. In order to reduce the steady-state error when stabilising the virtual lateral velocity control law, the integral term is introduced into the design of the sliding mode surface with a lateral velocity error, and then the second-order sliding mode surface with an integral is structured. In addition, due to the problem of controller oscillation and the role of the tracking differentiator (TD) in active disturbance rejection control (ADRC), the LVTD is designed to smooth the state quantity of lateral velocity. Subsequently, based on the dynamic model of USV under complex marine environment disturbances, the nonlinear disturbance observer is designed to observe the disturbances and compensate the control law. Finally, the whole cooperative formation system is proved to be uniformly and ultimately bounded, according to the Lyapunov stability theory, and the stability and validity of the method is also verified by the simulation results.
    Źródło:
    Polish Maritime Research; 2022, 3; 47-60
    1233-2585
    Pojawia się w:
    Polish Maritime Research
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Observer-based leader-following formation control of uncertain multiple agents by integral sliding mode
    Autorzy:
    Qian, D. W.
    Tong, S. W.
    Li, C. D.
    Powiązania:
    https://bibliotekanauki.pl/articles/201511.pdf
    Data publikacji:
    2017
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    multi-agent system
    formation control
    integral sliding mode control
    uncertainty
    nonlinear disturbance observer
    stability
    system wieloagentowy
    kontrola formacji
    integralne sterowanie ślizgowe
    niepewność
    nieliniowy obserwator zakłóceń
    stabilność
    Opis:
    This paper investigates the formation control problem of multiple agents. The formation control is founded on leader-following approaches. The method of integral sliding mode control is adopted to achieve formation maneuvers of the agents based on the concept of graph theory. Since the agents are subject to uncertainties, the uncertainties also challenge the formation-control design. Under a mild assumption that the uncertainties have an unknown bound, the technique of nonlinear disturbance observer is utilized to tackle the issue. According to a given communication topology, formation stability conditions are investigated by the observer-based integral sliding mode formation control. From the perspective of Lyapunov, not only is the formation stability guaranteed, but the desired formation of the agents is also realized. Finally, some simulation results are presented to show the feasibility and validity of the proposed control scheme through a multi-agent platform.
    Źródło:
    Bulletin of the Polish Academy of Sciences. Technical Sciences; 2017, 65, 1; 35-44
    0239-7528
    Pojawia się w:
    Bulletin of the Polish Academy of Sciences. Technical Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    An exponential observer and a controller for a class of nonlinear systems
    Autorzy:
    Hammami, M. A.
    Zribi, M
    Kallel, J
    Powiązania:
    https://bibliotekanauki.pl/articles/229713.pdf
    Data publikacji:
    2013
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    nonlinear system
    observer
    stability
    controller
    stabilization
    Opis:
    In this paper, we study the observer design problem for a class of nonlinear systems. Specifically, we design an exponential observer for a separately excited DC motor. Moreover, a stabilizing controller is designed for the system to ensure the exponential stability of the solutions toward their desired values. Simulations results show that proposed observer is able to reconstruct the states of the system. In addition, the simulation results indicate that the designed controller works well.
    Źródło:
    Archives of Control Sciences; 2013, 23, 1; 79-92
    1230-2384
    Pojawia się w:
    Archives of Control Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    State estimation for miso non-linear systems in controller canonical form
    Autorzy:
    Schwaller, B.
    Ensminger, D.
    Dresp-Langley, B.
    Ragot, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/331350.pdf
    Data publikacji:
    2016
    Wydawca:
    Uniwersytet Zielonogórski. Oficyna Wydawnicza
    Tematy:
    nonlinear system
    state observer
    continuous time
    układ nieliniowy
    obserwator stanu
    układ ciągły
    Opis:
    We propose a new observer where the model, decomposed in generalized canonical form of regulation described by Fliess, is dissociated from the part assuring error correction. The obtained stable exact estimates give direct access to state variables in the form of successive derivatives. The dynamic response of the observer converges exponentially, as long as the nonlinearities are locally of Lipschitz type. In this case, we demonstrate that a quadratic Lyapunov function provides a number of inequalities which guarantee at least local stability. A synthesis of gains is proposed, independent of the observation time scale. Simulations of a Düffing system and a Lorenz strange attractor illustrate theoretical developments.
    Źródło:
    International Journal of Applied Mathematics and Computer Science; 2016, 26, 3; 569-583
    1641-876X
    2083-8492
    Pojawia się w:
    International Journal of Applied Mathematics and Computer Science
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    State estimation for a class of nonlinear systems
    Autorzy:
    Schwaller, B.
    Ensminger, D.
    Dresp-Langley, B.
    Ragot, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/330611.pdf
    Data publikacji:
    2013
    Wydawca:
    Uniwersytet Zielonogórski. Oficyna Wydawnicza
    Tematy:
    nonlinear system
    state observer
    continuous time
    układ nieliniowy
    obserwator stanu
    układ ciągły
    Opis:
    We propose a new type of Proportional Integral (PI) state observer for a class of nonlinear systems in continuous time which ensures an asymptotic stable convergence of the state estimates. Approximations of non-linearity are not necessary to obtain such results, but the functions must be, at least locally, of the Lipschitz type. The obtained state variables are exact and robust against noise. Naslin’s damping criterion permits synthesizing gains in an algebraically simple and efficient way. Both the speed and damping of the observer response are controlled in this way. Model simulations based on a Sprott strange attractor are discussed as an example.
    Źródło:
    International Journal of Applied Mathematics and Computer Science; 2013, 23, 2; 383-394
    1641-876X
    2083-8492
    Pojawia się w:
    International Journal of Applied Mathematics and Computer Science
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Separation Principle for Nonlinear Systems: a Bilinear Approach
    Autorzy:
    Hammani, M. A.
    Jerbi, H.
    Powiązania:
    https://bibliotekanauki.pl/articles/908331.pdf
    Data publikacji:
    2001
    Wydawca:
    Uniwersytet Zielonogórski. Oficyna Wydawnicza
    Tematy:
    układ nieliniowy
    układ dwuliniowy
    obserwator
    stabilizacja
    nonlinear systems
    bilinear systems
    observer
    stabilization
    Opis:
    In this paper we investigate the local stabilizability of single-input nonlinear affine systems by means of an estimated state feedback law given by a bilinear observer. The associated bilinear approximating system is assumed to be observable for any input and stabilizable by a homogeneous feedback law of degree zero. Furthermore, we discuss the case of planar systems which admit bad inputs (i.e. the ones that make bilinear systems unobservable). A separation principle for such systems is given.
    Źródło:
    International Journal of Applied Mathematics and Computer Science; 2001, 11, 2; 481-492
    1641-876X
    2083-8492
    Pojawia się w:
    International Journal of Applied Mathematics and Computer Science
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Reduced-order perfect nonlinear observers of fractional descriptor discrete-time nonlinear systems
    Autorzy:
    Kaczorek, T.
    Powiązania:
    https://bibliotekanauki.pl/articles/330044.pdf
    Data publikacji:
    2017
    Wydawca:
    Uniwersytet Zielonogórski. Oficyna Wydawnicza
    Tematy:
    fractional descriptor
    nonlinear system
    discrete time system
    reduced order observer
    perfect observer
    układ ułamkowy
    układ nieliniowy
    układ dyskretny
    obserwator doskonały
    Opis:
    The purpose of this work is to propose and characterize fractional descriptor reduced-order perfect nonlinear observers for a class of fractional descriptor discrete-time nonlinear systems. Sufficient conditions for the existence of these observers are established. The design procedure of the observers is given and demonstrated on a numerical example.
    Źródło:
    International Journal of Applied Mathematics and Computer Science; 2017, 27, 2; 245-251
    1641-876X
    2083-8492
    Pojawia się w:
    International Journal of Applied Mathematics and Computer Science
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Robust observer design for Sugeno systems with incremental quadratic nonlinearity in the consequent
    Autorzy:
    Moodi, H.
    Farrokhi, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/331108.pdf
    Data publikacji:
    2013
    Wydawca:
    Uniwersytet Zielonogórski. Oficyna Wydawnicza
    Tematy:
    nonlinear Sugeno model
    incremental quadratic constraint
    robust observer
    model Sugeno nieliniowy
    obserwator odporny
    Opis:
    This paper is concerned with observer design for nonlinear systems that are modeled by T–S fuzzy systems containing parametric and nonparametric uncertainties. Unlike most Sugeno models, the proposed method contains nonlinear functions in the consequent part of the fuzzy IF-THEN rules. This will allow modeling a wider class of systems with smaller modelling errors. The consequent part of each rule contains a linear part plus a nonlinear term, which has an incremental quadratic constraint. This constraint relaxes the conservativeness introduced by other regular constraints for nonlinearities such as the Lipschitz conditions. To further reduce the conservativeness, a nonlinear injection term is added to the observer dynamics. Simulation examples show the effectiveness of the proposed method compared with the existing techniques reported in well-established journals.
    Źródło:
    International Journal of Applied Mathematics and Computer Science; 2013, 23, 4; 711-723
    1641-876X
    2083-8492
    Pojawia się w:
    International Journal of Applied Mathematics and Computer Science
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Integrated design of observer based fault detection for a class of uncertain nonlinear systems
    Autorzy:
    Chen, W.
    Khan, A, Q.
    Abid, M.
    Ding, S. X.
    Powiązania:
    https://bibliotekanauki.pl/articles/907595.pdf
    Data publikacji:
    2011
    Wydawca:
    Uniwersytet Zielonogórski. Oficyna Wydawnicza
    Tematy:
    detekcja uszkodzeń
    obserwator
    system nieliniowy
    optymalizacja
    odporność
    fault detection
    observer
    nonlinear system
    optimization
    robustness
    Opis:
    Integrated design of observer based Fault Detection (FD) for a class of uncertain nonlinear systems with Lipschitz nonlinearities is studied. In the context of norm based residual evaluation, the residual generator and evaluator are designed together in an integrated form, and, based on it, a trade-off FD system is finally achieved in the sense that, for a given Fault Detection Rate (FDR), the False Alarm Rate (FAR) is minimized. A numerical example is given to illustrate the effectiveness of the proposed design method.
    Źródło:
    International Journal of Applied Mathematics and Computer Science; 2011, 21, 3; 423-430
    1641-876X
    2083-8492
    Pojawia się w:
    International Journal of Applied Mathematics and Computer Science
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    A Hamiltonian approach to fault isolation in a planar vertical take-off and landing aircraft model
    Autorzy:
    Rodriguez-Alfaro, L. H.
    Alcorta-Garcia, E.
    Lara, D.
    Romero, G.
    Powiązania:
    https://bibliotekanauki.pl/articles/330664.pdf
    Data publikacji:
    2015
    Wydawca:
    Uniwersytet Zielonogórski. Oficyna Wydawnicza
    Tematy:
    Hamiltonian method
    observer
    fault diagnosis
    nonlinear system
    UAVs
    metoda Hamiltonowska
    obserwator
    diagnoza uszkodzeń
    układ nieliniowy
    Opis:
    The problem of fault detection and isolation in a class of nonlinear systems having a Hamiltonian representation is considered. In particular, a model of a planar vertical take-off and landing aircraft with sensor and actuator faults is studied. A Hamiltonian representation is derived from an Euler–Lagrange representation of the system model considered. In this form, nonlinear decoupling is applied in order to obtain subsystems with (as much as possible) specific fault sensitivity properties. The resulting decoupled subsystem is represented as a Hamiltonian system and observer-based residual generators are designed. The results are presented through simulations to show the effectiveness of the proposed approach.
    Źródło:
    International Journal of Applied Mathematics and Computer Science; 2015, 25, 1; 65-76
    1641-876X
    2083-8492
    Pojawia się w:
    International Journal of Applied Mathematics and Computer Science
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Reduced-order fractional descriptor observers for a class of fractional descriptor continuous-time nonlinear systems
    Autorzy:
    Kaczorek, T.
    Powiązania:
    https://bibliotekanauki.pl/articles/331141.pdf
    Data publikacji:
    2016
    Wydawca:
    Uniwersytet Zielonogórski. Oficyna Wydawnicza
    Tematy:
    fractional system
    descriptor system
    nonlinear system
    reduced order observer
    układ ułamkowy
    układ deskryptorowy
    układ nieliniowy
    Opis:
    Fractional descriptor reduced-order nonlinear observers for a class of fractional descriptor continuous-time nonlinear systems are proposed. Sufficient conditions for the existence of the observers are established. The design procedure for the observers is given and demonstrated on a numerical example.
    Źródło:
    International Journal of Applied Mathematics and Computer Science; 2016, 26, 2; 277-283
    1641-876X
    2083-8492
    Pojawia się w:
    International Journal of Applied Mathematics and Computer Science
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Practical Mittag-Leffler stability of quasi-one-sided Lipschitz fractional order systems
    Autorzy:
    Basdouri, Imed
    Kasmi, Souad
    Lerbet, Jean
    Powiązania:
    https://bibliotekanauki.pl/articles/27312007.pdf
    Data publikacji:
    2023
    Wydawca:
    Polska Akademia Nauk. Czasopisma i Monografie PAN
    Tematy:
    fractional-order systems
    Caputo derivative
    quasi-one-sided Lipschitz condition
    nonlinear systems
    observer design
    output feedback stabilization
    separation principle
    Opis:
    This paper focuses on the global practical Mittag-Leffler feedback stabilization problem for a class of uncertain fractional-order systems. This class of systems is a larger class of nonlinearities than the Lipschitz ones. Based on the quasi-one-sided Lipschitz condition, firstly, we provide sufficient conditions for the practical observer design. Then, we exhibit that practical Mittag-Leffler stability of the closed loop system with a linear, state feedback is attained. Finally, a separation principle is established and we prove that the closed loop system is practical Mittag-Leffler stable.
    Źródło:
    Archives of Control Sciences; 2023, 33, 1; 55--70
    1230-2384
    Pojawia się w:
    Archives of Control Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Fault detection in nonlinear systems via linear methods
    Autorzy:
    Zhirabok, A.
    Shumsky, A.
    Solyanik, S.
    Suvorov, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/330933.pdf
    Data publikacji:
    2017
    Wydawca:
    Uniwersytet Zielonogórski. Oficyna Wydawnicza
    Tematy:
    nonlinear dynamic system
    diagnostic observer
    robustness
    nondifferentiable nonlinearity
    logic dynamic approach
    układ dynamiczny
    układ nieliniowy
    obserwator diagnostyczny
    odporność na uszkodzenia
    Opis:
    The problem of robust linear and nonlinear diagnostic observer design is considered. A method is suggested to construct the observers that are disturbance decoupled or have minimal sensitivity to the disturbances. The method is based on a logic-dynamic approach which allows us to consider systems with non-differentiable nonlinearities in the state equations by methods of linear algebra.
    Źródło:
    International Journal of Applied Mathematics and Computer Science; 2017, 27, 2; 261-272
    1641-876X
    2083-8492
    Pojawia się w:
    International Journal of Applied Mathematics and Computer Science
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Neural network-based MRAC control of dynamic nonlinear systems
    Autorzy:
    Debbache, G.
    Bennia, A.
    Goléa, N.
    Powiązania:
    https://bibliotekanauki.pl/articles/908401.pdf
    Data publikacji:
    2006
    Wydawca:
    Uniwersytet Zielonogórski. Oficyna Wydawnicza
    Tematy:
    sieć neuronowa
    model odniesienia
    system nieliniowy
    sterowanie adaptacyjne
    obserwator
    stabilność
    neural networks
    reference model
    nonlinear systems
    adaptive control
    observer
    stability
    Opis:
    This paper presents direct model reference adaptive control for a class of nonlinear systems with unknown nonlinearities. The model following conditions are assured by using adaptive neural networks as the nonlinear state feedback controller. Both full state information and observer-based schemes are investigated. All the signals in the closed loop are guaranteed to be bounded and the system state is proven to converge to a small neighborhood of the reference model state. It is also shown that stability conditions can be formulated as linear matrix inequalities (LMI) that can be solved using efficient software algorithms. The control performance of the closed-loop system is guaranteed by suitably choosing the design parameters. Simulation results are presented to show the effectiveness of the approach.
    Źródło:
    International Journal of Applied Mathematics and Computer Science; 2006, 16, 2; 219-232
    1641-876X
    2083-8492
    Pojawia się w:
    International Journal of Applied Mathematics and Computer Science
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Algorytm regulacji odpornej ADRC - dobór nastaw i sposób dyskretnej implementacji
    Robust ADRC Control - Tuning and Discrete Implementation
    Autorzy:
    Michalski, Jacek
    Kozierski, Piotr
    Retinger, Marek
    Puchalski, Radosław
    Powiązania:
    https://bibliotekanauki.pl/articles/2090883.pdf
    Data publikacji:
    2022
    Wydawca:
    Sieć Badawcza Łukasiewicz - Przemysłowy Instytut Automatyki i Pomiarów
    Tematy:
    sterowanie ADRC
    regulator PID
    sprzężenie od stanu
    rozszerzony obserwator stanu
    dobór nastaw
    wielowymiarowy obiekt nieliniowy
    ADRC control
    PID controller
    state feedback
    extended state observer
    tuning methods
    multidimensional nonlinear system
    Opis:
    W niniejszej pracy został przedstawiony algorytm regulacji odpornej Active Disturbance Rejection Control obiektem aerodynamicznym o dwóch stopniach swobody. Pokazano pełne wyprowadzenia równań algorytmu regulacji oraz wartości nastaw w zależności od pożądanych właściwości układu, na podstawie dynamiki obiektu oscylacyjnego drugiego rzędu. Dokonano dyskretyzacji równań algorytmu regulacji i zaproponowano jego dyskretną implementację. Testy przeprowadzono na laboratoryjnym zestawie aerodynamicznym firmy Inteco, którego model matematyczny jest silnie nieliniowy, ma dwa stopnie swobody i sprzężenia skrośne. Jakość działania oceniona została na podstawie przebiegów czasowych, a także całkowych wskaźników jakości. Przeprowadzone badania pokazują przewagę zastosowanego algorytmu nad regulacja PID dla badanego systemu. Przedstawiony algorytm regulacji cechuje się także większą przenośnością - nastawy dobierane są tylko w oparciu o rząd obiektu i teoretycznie raz dobrane są właściwe, niezależnie od modelu matematycznego. Zaproponowane równania dyskretne mogą zostać zaimplementowane z użyciem dowolnego języka programowania dla teoretycznie dowolnego obiektu, przy uwzględnieniu rzędu jego dynamiki.
    This paper presents the robust Active Disturbance Rejection Control method in an aerodynamical object with two degrees of freedom. Full derivation of control algorithm equations and the settings values depending on the desired properties of the system, based on the dynamics of the second order oscillating object, have been shown. The equations of the control algorithm were discretized and its discrete implementation was proposed. The tests were carried out on the Inteco aerodynamical laboratory kit, whose mathematical model is strongly non-linear, has two degrees of freedom and crosscoupling. The quality of operation was assessed on the basis of time graphs as well as integral quality indices. The conducted research shows the advantage of the applied algorithm over PID control for the tested system. The presented control algorithm is also more portable - the settings are selected only on the basis of the object order and once selected are correct regardless of the mathematical model. The proposed discrete equations can be implemented using any programming language theoretically for any object, taking into account the order of its dynamics.
    Źródło:
    Pomiary Automatyka Robotyka; 2022, 26, 2; 5--13
    1427-9126
    Pojawia się w:
    Pomiary Automatyka Robotyka
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    An adaptive observer design approach for a class of discrete-time nonlinear systems
    Autorzy:
    Srinivasarengan, K.
    Ragot, J.
    Aubrun, C.
    Maquin, D.
    Powiązania:
    https://bibliotekanauki.pl/articles/330844.pdf
    Data publikacji:
    2018
    Wydawca:
    Uniwersytet Zielonogórski. Oficyna Wydawnicza
    Tematy:
    adaptive observer
    joint state estimation
    parameter estimation
    Takagi-Sugeno model
    time-varying parameter estimation
    sector nonlinearity transformation
    discrete-time nonlinear systems
    obserwator adaptacyjny
    identyfikacja parametrów
    model Takagi-Sugeno
    transformacja nieliniowa
    dyskretny układ nieliniowy
    Opis:
    We consider the problem of joint estimation of states and some constant parameters for a class of nonlinear discrete-time systems. This class contains systems that could be transformed into a quasi-LPV (linear parameter varying) polytopic model in the Takagi–Sugeno (T–S) form. Such systems could have unmeasured premise variables, a case usually overlooked in the observer design literature. We assert that, for such systems in discrete-time, the current literature lacks design strategies for joint state and parameter estimation. To this end, we adapt the existing literature on continuous-time linear systems for joint state and time-varying parameter estimation. We first develop the discrete-time version of this result for linear systems. A Lyapunov approach is used to illustrate stability, and bounds for the estimation error are obtained via the bounded real lemma. We use this result to achieve our objective for a design procedure for a class of nonlinear systems with constant parameters. This results in less conservative conditions and a simplified design procedure. A basic waste water treatment plant simulation example is discussed to illustrate the design procedure.
    Źródło:
    International Journal of Applied Mathematics and Computer Science; 2018, 28, 1; 55-67
    1641-876X
    2083-8492
    Pojawia się w:
    International Journal of Applied Mathematics and Computer Science
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-25 z 25

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