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    Wyświetlanie 1-14 z 14
    Tytuł:
    Directional change and windup phenomena in LQR-controlled systems with actuator failure
    Autorzy:
    Horla, D.
    Powiązania:
    https://bibliotekanauki.pl/articles/141455.pdf
    Data publikacji:
    2018
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    directional change
    windup phenomenon
    actuator failure
    Opis:
    The paper presents a phenomenon of directional change in the case of a LQR controller applied to multivariable plants with amplitude and rate constraints imposed on the control vector, as well as the impact of the latter on control performance, with the indirect observation of the windup phenomenon effect via frequency of consecutive resaturations. The interplay of directional change of the computed control vector with control performance has been thoroughly investigated, and it is a result of the presence of constraints imposed on the applied control vector for different ratios of the number of control inputs to plant outputs. The impact of the directional change phenomenon on the control performance (and also on the windup phenomenon) has been defined, stating that performance deterioration is not tightly coupled with preservation of direction of the computed control vector. This conjecture has been supported by numerous simulation results for different types of plants with different LQR controller parameters.
    Źródło:
    Archives of Electrical Engineering; 2018, 67, 2; 345--359
    1427-4221
    2300-2506
    Pojawia się w:
    Archives of Electrical Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Pole - Placement Adaptive Control for a Plant with Unknown Structure and Parameters - a Simulation Study
    Autorzy:
    Horla, D.
    Powiązania:
    https://bibliotekanauki.pl/articles/384688.pdf
    Data publikacji:
    2012
    Wydawca:
    Sieć Badawcza Łukasiewicz - Przemysłowy Instytut Automatyki i Pomiarów
    Tematy:
    adaptive control
    identification
    Opis:
    Adaptive pole-placement control for the plant with unknown orders and coefficients of its model is presented in the paper, in an on-line approach. In order to adapt to the plant, the considered controller changes its structure and parameters, along with the identification process. In order to combine structural and parametric identification, the approach presented in [5] has been used, with the simulation runs performed for continuous plant and a discrete-time controller and identification algorithms.
    Źródło:
    Journal of Automation Mobile Robotics and Intelligent Systems; 2012, 6, 1; 28-32
    1897-8649
    2080-2145
    Pojawia się w:
    Journal of Automation Mobile Robotics and Intelligent Systems
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    On directional change and anti-windup compensation in multivariable control systems
    Autorzy:
    Horla, D.
    Powiązania:
    https://bibliotekanauki.pl/articles/907664.pdf
    Data publikacji:
    2009
    Wydawca:
    Uniwersytet Zielonogórski. Oficyna Wydawnicza
    Tematy:
    układ wielowymiarowy
    sterowanie optymalne
    system sterowania
    windup phenomenon
    multivariable systems
    optimal control
    Opis:
    The paper presents a novel description of the interplay between the windup phenomenon and directional change in controls for multivariable systems (including plants with an uneven number of inputs and outputs), usually omitted in the literature. The paper also proposes a new classification of anti-windup compensators with respect to the method of generating the constrained control signal.
    Źródło:
    International Journal of Applied Mathematics and Computer Science; 2009, 19, 2; 281-289
    1641-876X
    2083-8492
    Pojawia się w:
    International Journal of Applied Mathematics and Computer Science
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Robust Performance of Sampled-data Adaptive Control. From Simulation to Experimental Results
    Autorzy:
    Horla, D.
    Powiązania:
    https://bibliotekanauki.pl/articles/950947.pdf
    Data publikacji:
    2015
    Wydawca:
    Sieć Badawcza Łukasiewicz - Przemysłowy Instytut Automatyki i Pomiarów
    Tematy:
    adaptive control
    robustness
    sampled-data systems
    servo
    Opis:
    The paper considers robustness aspects of adaptive control in application to sampled-data systems with poleplacement controller subject to plant-model mismatch, in the sense of mistuning to model parameters with respect to their „true” values. The paper extends the results presented in author’s previous work respecting comparison of sampled-data and discrete-time control systems to experimental results obtained from the control system of a servo drive. Firstly, the adaptive sampleddata controller is introduced and is applied by means of simulation, secondly, it is implemented in real-time control system to extend robust performance issues to realworld control systems. Finally, the regions of robust performance are shown on parameter surface, i.e. visualisation of parameters? span for which there is no severe performance degradation in comparison to the best plantmodel matching, as a function of sampling interval.
    Źródło:
    Journal of Automation Mobile Robotics and Intelligent Systems; 2015, 9, 2; 3-8
    1897-8649
    2080-2145
    Pojawia się w:
    Journal of Automation Mobile Robotics and Intelligent Systems
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Directional change in multivariable LQG control with actuator failure
    Autorzy:
    Horla, D.
    Powiązania:
    https://bibliotekanauki.pl/articles/199944.pdf
    Data publikacji:
    2017
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    directional change
    actuator failure
    windup phenomenon
    LQG
    siłownik
    Opis:
    The paper presents the phenomenon of directional change in LQG control of multivariable systems with amplitude constraints, as well as the impact of the latter on control performance. The interplay of directional change of the computed control vector with control performance has been thoroughly investigated, and is a result of the presence of constraints imposed on the applied control vector for different proportions of the number of control inputs to plant outputs. The impact of directional change phenomenon on the control performance has been defined, stating that performance deterioration is not tightly coupled with preservation of direction of the computed control vector. The statement has been supported by numerous simulation results for different types of plants with different LQG controller parameters.
    Źródło:
    Bulletin of the Polish Academy of Sciences. Technical Sciences; 2017, 65, 4; 419-428
    0239-7528
    Pojawia się w:
    Bulletin of the Polish Academy of Sciences. Technical Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Analiza jakości śledzenia w układach z kompensatorami zjawiska windup dla obiektów oscylacyjnych
    Quality analysis of the tracking systems with anti-windup compensators for oscillatory plant models
    Autorzy:
    Rumatowski, K.
    Horla, D.
    Powiązania:
    https://bibliotekanauki.pl/articles/153740.pdf
    Data publikacji:
    2007
    Wydawca:
    Stowarzyszenie Inżynierów i Techników Mechaników Polskich
    Tematy:
    kompensator zjawiska windup
    błąd śledzenia
    integrator
    block diagram
    saturation
    anti-windup compensator
    tracking error
    Opis:
    Artykuł dotyczy analizy wpływu kompensacji zjawiska windup na jakość śledzenia w układach z regulatorem PID i ograniczeniem amplitudy sygnału sterującego dla obiektów oscylacyjnych. Jakość śledzenia oceniano na podstawie różnic między wartościami całkowych wskaźników (modułu i kwadratu błędu śledzenia) dla układu bez i z kompensatorem. Nastawy parametrów regulatora dla rozpatrywanych modeli symulacyjnych dobrano wykorzystując blok NCD pakietu Matlab. Wyniki numeryczne analiz symulacyjnych uzyskano dla stabilnych obiektów oscylacyjnych i prostokątnego sygnału śledzonego.
    The paper discusses influence of anti+windup compensator on tracking operation of szstems with PID controllers and control amplitude constraints for oscillatorz plants. Tracking performance has been evaluated according to differencies between intregal indexes (of absolute and squared tracking error) for szstems with ang without compensation Controller parapeters for considered plants have been chosen according to NCD block from MATLAB. The results of numerical analzsis have been obtained for stable oscillatorz plants and square reference signal.
    Źródło:
    Pomiary Automatyka Kontrola; 2007, R. 53, nr 10, 10; 45-49
    0032-4140
    Pojawia się w:
    Pomiary Automatyka Kontrola
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Analysis of simple anti-windup compensation in pole-placement control of a second order oscillatory system
    Autorzy:
    Sadalla, T.
    Horla, D.
    Powiązania:
    https://bibliotekanauki.pl/articles/114395.pdf
    Data publikacji:
    2015
    Wydawca:
    Stowarzyszenie Inżynierów i Techników Mechaników Polskich
    Tematy:
    anti-windup compensator
    IAE
    ISE
    saturation
    pole placement
    PID controller
    Opis:
    The main aim of the paper is to present the analysis of anti-windup compensation impact on tracking performance for a second-order plant and continuous-time PID controller and five different simple anti-windup compensators. The performance of the system is compared on the basis of computing differences between the integrals of absolute and squared tracking errors for the system with and without compensation, as well as observing the excess of windup phenomena taking place. Parameters of the controller are computed according to pole-placement scheme. The control system quality is described on the basis of two quality indices for a stable oscillatory second-order plant and a square reference signal.
    Źródło:
    Measurement Automation Monitoring; 2015, 61, 2; 54-57
    2450-2855
    Pojawia się w:
    Measurement Automation Monitoring
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Robust LQR and LQI control with actuator failure of a 2DOF unmanned bicycle robot stabilized by an inertial wheel
    Autorzy:
    Owczarkowski, A.
    Horla, D.
    Powiązania:
    https://bibliotekanauki.pl/articles/330270.pdf
    Data publikacji:
    2016
    Wydawca:
    Uniwersytet Zielonogórski. Oficyna Wydawnicza
    Tematy:
    unmanned bicycle robot
    LQR control
    LQI control
    robustness
    actuator failure
    regulator LQR
    regulator LQI
    sterowanie odporne
    Opis:
    Essential ingredients for robust control are the ability to cope with different types of system behavior following modeling imperfections and the ability to assure a certain performance level. In this paper, we propose to use an actuator fault-tolerant control law to govern, during experiments, the stabilization of a bicycle robot with an inertial wheel in order to take into account unmodeled uncertainty introduced by using a linearized model in an LQR fashion. Our proposal is illustrated by signal plots and the values of performance indices obtained from a set of experiments.
    Źródło:
    International Journal of Applied Mathematics and Computer Science; 2016, 26, 2; 325-334
    1641-876X
    2083-8492
    Pojawia się w:
    International Journal of Applied Mathematics and Computer Science
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Robustness of adaptive discrete-time LQG control for first-order systems
    Autorzy:
    Królikowski, A.
    Horla, D.
    Powiązania:
    https://bibliotekanauki.pl/articles/199940.pdf
    Data publikacji:
    2010
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    first order system
    adaptive LQG control
    robustness
    Opis:
    The discrete-time adaptive LQG control of first-order systems is considered from robustness point of view. Both stability and performance robustness are analyzed for different control system structures. A case of amplitude-constrained control is presented, and application of certainty equivalence for self-tuning implementation is also discussed.
    Źródło:
    Bulletin of the Polish Academy of Sciences. Technical Sciences; 2010, 58, 1; 89-97
    0239-7528
    Pojawia się w:
    Bulletin of the Polish Academy of Sciences. Technical Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    LQG/LTR control of input-delayed discrete-time systems
    Autorzy:
    Horla, D.
    Krolikowski, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/200895.pdf
    Data publikacji:
    2019
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    LQG control
    loop transfer recovery
    time-delay
    Opis:
    A simple robust cheap LQG control is considered for discrete-time systems with constant input delay. It is well known that the full loop transfer recovery (LTR) effect measured by error function ∆(z) can only be obtained for minimum-phase (MPH) systems without time-de-lay. Explicit analytical expressions for ∆(z) versus delay d are derived for both MPH and NMPH (nonminimum-phase) systems. Obviously, introducing delay deteriorates the LTR effect. In this context the ARMAX system as a simple example of noise-correlated system is examined. The robustness of LQG/LTR control is analyzed and compared with state prediction control whose robust stability is formulated via LMI. Also, the robustness with respect to uncertain time-delay is considered including the control systems which are unstable in open-loop. An analysis of LQG/LTR problem for noise-correlated systems, particularly for ARMAX system, is included and the case of proper systems is analyzed. Computer simulations of second-order systems with constant time-delay are given to illustrate the performance and recovery error for considered systems and controllers.
    Źródło:
    Bulletin of the Polish Academy of Sciences. Technical Sciences; 2019, 67, 6; 1049-1058
    0239-7528
    Pojawia się w:
    Bulletin of the Polish Academy of Sciences. Technical Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Wrong transition and measurement models in power system state estimation
    Autorzy:
    Kozierski, P.
    Lis, M.
    Horla, D.
    Powiązania:
    https://bibliotekanauki.pl/articles/141129.pdf
    Data publikacji:
    2016
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    particle filter
    estimation quality
    Population Monte Carlo
    Opis:
    The influence of wrong information about transition and measurement models on estimation quality has been presented in the paper. Two methods of a particle filter, with and without the Population Monte Carlo modification, and also the extended and unscented Kalman filters methods have been compared. A small 5-bus power system has been used in simulations, which have been performed based on one data set, and this data set has been chosen from among 100 different – to draw the most general conclusions. Based on the obtained results it has been found that for the particle filter methods the implementation of the slightly higher standard deviation than the true value, usually increases the estimation quality. For the Kalman filters methods it has been concluded that optimal values of variances are equal to the true values.
    Źródło:
    Archives of Electrical Engineering; 2016, 65, 3; 559-574
    1427-4221
    2300-2506
    Pojawia się w:
    Archives of Electrical Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Power system state estimation using dispersed particle filter
    Autorzy:
    Kozierski, P.
    Lis, M.
    Horla, D.
    Powiązania:
    https://bibliotekanauki.pl/articles/950942.pdf
    Data publikacji:
    2014
    Wydawca:
    Sieć Badawcza Łukasiewicz - Przemysłowy Instytut Automatyki i Pomiarów
    Tematy:
    particle filter
    power system
    state observer
    state estimation
    dispersed estimation
    Opis:
    The paper presents a new approach to particle filtering, i.e. Dispersed Particle Filter. This algorithm has been applied to the power system, but it can also be used in other transmission networks. In this approach, the whole network must be divided into smaller parts. As it has been shown, use of Dispersed Particle Filter improves the quality of the state estimation, compared to a simple particle filter. It has been also checked that communication between subsystems improves the obtained results. It has been checked by means of simulation based on model, which has been created on the basis of knowledge about practically functioning power systems.
    Źródło:
    Journal of Automation Mobile Robotics and Intelligent Systems; 2014, 8, 3; 35-40
    1897-8649
    2080-2145
    Pojawia się w:
    Journal of Automation Mobile Robotics and Intelligent Systems
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Particle filter in power system state estimation – bad measurement data and branch disconnection
    Autorzy:
    Kozierski, P.
    Lis, M.
    Owczarkowski, A.
    Horla, D.
    Powiązania:
    https://bibliotekanauki.pl/articles/141558.pdf
    Data publikacji:
    2015
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    bad data
    branch disconnection measurement errors
    particle filter
    power system
    state estimation
    Opis:
    An approach to power system state estimation using a particle filter has been proposed in the paper. Two problems have been taken into account during research, namely bad measurements data and a network structure modification with rapid changes of the state variables. For each case the modification of the algorithm has been proposed. It has also been observed that anti-zero bias modification has a very positive influence on the obtained results (few orders of magnitude, in comparison to the standard particle filter), and additional calculations are quite symbolic. In the second problem, used modification also improved estimation quality of the state variables. The obtained results have been compared to the extended Kalman filter method.
    Źródło:
    Archives of Electrical Engineering; 2015, 64, 2; 237-248
    1427-4221
    2300-2506
    Pojawia się w:
    Archives of Electrical Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Influence of time delay on fractional-order PI-controlled system for a second-order oscillatory plant model with time delay
    Autorzy:
    Sadalla, T.
    Horla, D.
    Giernacki, W.
    Kozierski, P.
    Powiązania:
    https://bibliotekanauki.pl/articles/140432.pdf
    Data publikacji:
    2017
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    fractional-order control
    FOPI controller
    stability analysis
    time delay
    tracking
    Opis:
    The paper aims at presenting the influence of an open-loop time delay on the stability and tracking performance of a second-order open-loop system and continuoustime fractional-order PI controller. The tuning method of this controller is based on Hermite- Biehler and Pontryagin theorems, and the tracking performance is evaluated on the basis of two integral performance indices, namely IAE and ISE. The paper extends the results and methodology presented in previous work of the authors to analysis of the influence of time delay on the closed-loop system taking its destabilizing properties into account, as well as concerning possible application of the presented results and used models.
    Źródło:
    Archives of Electrical Engineering; 2017, 66, 4; 693-704
    1427-4221
    2300-2506
    Pojawia się w:
    Archives of Electrical Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-14 z 14

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