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    Wyświetlanie 1-9 z 9
    Tytuł:
    A robust smooth controller for a unicycle-like robot
    Autorzy:
    Pazderski, D.
    Powiązania:
    https://bibliotekanauki.pl/articles/229667.pdf
    Data publikacji:
    2018
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    transverse functions
    nonholonomic system
    control motion task
    Lie group
    navigation vector fields
    smooth feedbacks
    Opis:
    In this paper, a stabilizer dedicated for a unicycle-like robot is considered. The proposed smooth control law ensures the global boundedness of position and orientation trajectories to a neighbourhood of the desired point with an arbitrarily selected radius and it is robust to bounded additive measurement noises. The controller consists of a smooth hybrid navigation algorithm and a smooth feedback based on the transverse function approach. The stability proof, simulation and experimental results illustrating properties of the algorithm are discussed.
    Źródło:
    Archives of Control Sciences; 2018, 28, 1; 155-183
    1230-2384
    Pojawia się w:
    Archives of Control Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Adaptive control scheme based on the least squares support vector machine network
    Autorzy:
    Mahmoud, T. K.
    Powiązania:
    https://bibliotekanauki.pl/articles/930155.pdf
    Data publikacji:
    2011
    Wydawca:
    Uniwersytet Zielonogórski. Oficyna Wydawnicza
    Tematy:
    modelowanie systemu
    system nieliniowy
    system sterowania
    sieć neuronowa
    maszyna wektorów wspierających
    support vector machine (SVM)
    neural network
    nonlinear system modeling
    nonlinear system control
    pH control
    Opis:
    Recently, a new type of neural networks called Least Squares Support Vector Machines (LS-SVMs) has been receiving increasing attention in nonlinear system identification and control due to its generalization performance. This paper develops a stable adaptive control scheme using the LS-SVM network. The developed control scheme includes two parts: the identification part that uses a modified structure of LS-SVM neural networks called the multi-resolution wavelet least squares support vector machine network (MRWLS-SVM) as a predictor model, and the controller part that is developed to track a reference trajectory. By means of the Lyapunov stability criterion, stability analysis for the tracking errors is performed. Finally, simulation studies are performed to demonstrate the capability of the developed approach in controlling a pH process.
    Źródło:
    International Journal of Applied Mathematics and Computer Science; 2011, 21, 4; 685-696
    1641-876X
    2083-8492
    Pojawia się w:
    International Journal of Applied Mathematics and Computer Science
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Analiza wyników symulacji ewolucyjnej optymalizacji parametrycznej różnych układów sterowania polowo-zorientowanego z silnikiem indukcyjnym
    Analysis of evolutionary simulation of parametric optimization of different field-oriented control systems with induction motors
    Autorzy:
    Hudy, W.
    Jaracz, K.
    Powiązania:
    https://bibliotekanauki.pl/articles/187537.pdf
    Data publikacji:
    2011
    Wydawca:
    Sieć Badawcza Łukasiewicz - Instytut Technik Innowacyjnych EMAG
    Tematy:
    silniki indukcyjne
    maszyny elektryczne
    układy sterowania wektorowego
    induction motors
    AC machines
    vector control system
    Opis:
    W chwili obecnej silniki indukcyjne (w tym pierścieniowe) są powszechnie stosowanymi maszynami prądu przemiennego. Na popularność wykorzystania tego typu maszyn elektrycznych wpływa niski koszt budowy oraz szybki rozwój układów sterowania wektorowego. W niniejszym artykule porównano układy sterowania DFOC, których wartości nastaw regulatorów zostały obliczone przez algorytm ewolucyjny. Funkcją uczącą była skokowa zmiana wartości prędkości obrotowej oraz skokowo zadana zmiana momentu obciążenia podczas pracy silnika. Układ sterowania zweryfikowano przy pomocy pakietu MATLAB/Simulink.
    Induction motors (including slip-ring motors) are commonly used AC machines nowadays. Their popularity is due to low costs of construction and quick development of vector control systems. The article compares DFOC control systems whose setting values of regulators were calculated by means of the evolutionary algorithm. The learning function was a step change of rotational speed and a stepwise-set change of load torque during the motor operations. The control system was verified with the use of the MATLAB/Simulink kit.
    Źródło:
    Mechanizacja i Automatyzacja Górnictwa; 2011, R. 49, nr 12, 12; 20-26
    0208-7448
    Pojawia się w:
    Mechanizacja i Automatyzacja Górnictwa
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Dynamic analysis of a mechatronic drive system with an induction motor
    Autorzy:
    Cao, Yongdi
    Liu, Xiaohong
    Powiązania:
    https://bibliotekanauki.pl/articles/2200885.pdf
    Data publikacji:
    2023
    Wydawca:
    Polskie Towarzystwo Mechaniki Teoretycznej i Stosowanej
    Tematy:
    dynamic model
    electromechanical system
    vector control
    optimization
    rotor
    Opis:
    The paper presents research findings in the modelling and optimization of dynamic parameters of mechatronic systems with an induction motor. A mathematical model was developed to analyze currents in dynamic states of squirrel-cage rotors in the case of a line-to-line fault. The findings were verified experimentally using calculations for a 1.5 kW three-phase induction motor. The equations for a stationary 0x, 0y coordinate system relating to the stator were derived. The set of design variables selected in the optimization process contained parameters describing design features of the gear shafts and control units settings.
    Źródło:
    Journal of Theoretical and Applied Mechanics; 2023, 61, 2; 245--258
    1429-2955
    Pojawia się w:
    Journal of Theoretical and Applied Mechanics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Industrial implementations of control algorithms for voltage inverters supplying induction motors
    Autorzy:
    Jabłoński, Mariusz
    Borkowski, Piotr
    Powiązania:
    https://bibliotekanauki.pl/articles/1841309.pdf
    Data publikacji:
    2021
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    open mining
    sensorless control
    vector-controlled
    adjustable speed drive
    converter system
    voltage-feed induction motors
    Opis:
    This article discusses the most important issues regarding the implementation of digital algorithms for control and drive technology in industrial machines, especially in open mining machines. The article presents the results of tests in which the algorithm and drive control parameter settings were not selected appropriately for voltage-fed induction motors, and where the control speed was not verified by any of the available motoring or simulation methods. We then show how the results can be improved using field-oriented control algorithms and deep parameters analysis for sensorless field-oriented performance.
    Źródło:
    Archives of Electrical Engineering; 2021, 70, 2; 475-491
    1427-4221
    2300-2506
    Pojawia się w:
    Archives of Electrical Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Regina computer system for intelligent monitoring, diagnostics, and management of railway power supply systems
    Autorzy:
    Sopel, Mykhailo
    Stasyuk, Oleksandr
    Kuznetsov, Valeriy
    Goncharova, Lidiya
    Hubskyi, Petro
    Powiązania:
    https://bibliotekanauki.pl/articles/2096168.pdf
    Data publikacji:
    2021
    Wydawca:
    Polska Akademia Nauk. Polskie Towarzystwo Diagnostyki Technicznej PAN
    Tematy:
    Regina intelligent computer system
    intelligent monitoring
    diagnostics
    control
    power supply
    railway
    identification of accidents
    optimization of power consumption
    traction substation
    synchronous vector measurements
    comprehensive informational content
    monitoring inteligentny
    diagnostyka
    kontrola
    kolej
    identyfikacja wypadków
    optymalizacja zużycia energii
    inteligentny system diagnozowania
    Opis:
    The analysis of the problem of innovative transformation of power supply networks of railways made it possible to scientifically substantiate the direction of research related to an optimal strategy for computer monitoring and intellectualization of the processes of power supply of traction substations of railways. Conceptual approaches to the formation of a new model of intellectualization of power supply networks have been developed. Differential models of high organization of synchronous vector measurements are proposed, allowing to determine the comprehensive information content of the primary data. Based on the concept of smart energy, a set of differential models and methods of harmonic and correlation analysis of anomalous and transient processes occurring in power systems has been developed. The REGINA computer system has been designed and manufactured to carry out, in real-time, intelligent monitoring, diagnostics, identification of accidents, optimization of power consumption and expanding the range of market services in managing railway power supply networks. The REGINA system complies with the requirements of ISO 9001: 2015 and the German certification body DOS. Many actual results obtained during the operation of the REGINA on the railways are presented.
    Źródło:
    Diagnostyka; 2021, 22, 4; 77-88
    1641-6414
    2449-5220
    Pojawia się w:
    Diagnostyka
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Structures of vector control of n-phase motor drives based on generalized Clarke transformation
    Autorzy:
    Janaszek, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/200409.pdf
    Data publikacji:
    2016
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    electric drive
    electric motor
    vector control of multiphase system
    Clarke's transformation
    napęd elektryczny
    silnik elektryczny
    transformata Clarka
    system wielofazowy
    sterowanie wektorowe
    Opis:
    The paper presents vector control structures for n-phase AC motors derived from generalized Clarke transformation. In contrast to known works, where authors operate on generalized formulas of the Clarke transformation, in this work, only a number of actually used phases, of mostly industrial purposes, are considered (n = 5, 6, 2×3). This allows to perform control calculations in stationary orthogonal coordinates aβ or rotating dq. There are implementations of different control strategies: ROC (rotor-oriented control) or FOC (field-oriented control). Next, the paper presents the novel concept of a voltage modulator designed for multi-phase drive systems. Operation of the modulator is based on the extended Clarke transformation for multiphase systems. A mathematical model of the multiphase voltage modulator, operating in open-loop and closed-loop current control has been presented. Some selected oscillograms of voltage and current waveform, which illustrate properties of proposed control structures have been presented.
    Źródło:
    Bulletin of the Polish Academy of Sciences. Technical Sciences; 2016, 64, 4; 865-872
    0239-7528
    Pojawia się w:
    Bulletin of the Polish Academy of Sciences. Technical Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Unscented and extended Kalman filters study for sensorless control of PM synchronous motors with load torque estimation
    Autorzy:
    Zawirski, K.
    Janiszewski, D.
    Muszynski, R.
    Powiązania:
    https://bibliotekanauki.pl/articles/200273.pdf
    Data publikacji:
    2013
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    Kalman filters
    control system synthesis
    machine vector control
    sensorless drives
    velocity control
    permanent magnet synchronous motor
    Opis:
    This paper describes a study and the experimental verification of sensorless control of permanent magnet synchronous motors using Kalman filters. There are proposed two structures, extended and unscented Kalman filters, which use only the measurement of the motor current for on-line estimation of speed, rotor position and load torque reconstruction. The Kalman filter is an optimal state estimator and is usually applied to a dynamic system that involves a random noise environment. These structures are described in detail, starting with the selection of the variables state vector, the filters structure, and ending with in-depth laboratory tests. It has become possible, without using position and torque sensors, to apply these control structures as a cost-effective solution. Experimental results confirm the validity of the proposed estimation techniques.
    Źródło:
    Bulletin of the Polish Academy of Sciences. Technical Sciences; 2013, 61, 4; 793-801
    0239-7528
    Pojawia się w:
    Bulletin of the Polish Academy of Sciences. Technical Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Utilization of a neutral wire filter inductor in a three-leg four-wire active power filter
    Autorzy:
    Pettersson, S.
    Salo, M.
    Tuusa, H.
    Powiązania:
    https://bibliotekanauki.pl/articles/262723.pdf
    Data publikacji:
    2005
    Wydawca:
    Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie
    Tematy:
    four-wire system
    power quality
    vector control
    control delay compensation
    performacnce
    Opis:
    Three-leg active power filter topology is the cost effective solution implementing a four-wire active power filter but it has some disadvantages compared to four-leg topology. The lack of a neutral wire filter inductor results in larger filter losses and therefore the efficiency of the topology is impaired. The neutral wire filter inductor is typically used with the four-leg four-wire active power filter topology and significantly reduces switching frequency current ripple. In this paper the suitability of a neutral wire filter inductor for the three-leg topology is studied. The performance of three-leg topology with a neutral wire filter inductor is studied through computer simulations and laboratory tests. The results indicate that the use of the neutral wire filter inductor clearly improves the performance of three-leg topology.
    Źródło:
    Electrical Power Quality and Utilisation. Journal; 2005, 11, 2; 83-89
    1896-4672
    Pojawia się w:
    Electrical Power Quality and Utilisation. Journal
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-9 z 9

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