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    Wyświetlanie 1-8 z 8
    Tytuł:
    Averaged model of a buck DC–DC converter for single-loop description of current-mode control
    Autorzy:
    Janke, Włodzimierz
    Bączek, Maciej
    Kraśniewski, Jarosław
    Powiązania:
    https://bibliotekanauki.pl/articles/141131.pdf
    Data publikacji:
    2019
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    averaged model
    buck converter
    continuous conduction mode
    peak current
    mode control
    Opis:
    : Averaged models: an AC large signal, DC and AC small signals of a currentcontrolled buck converter are described. Only peak current mode control of a converter working in the continuous conduction mode (CCM) is considered. The model derivation differs from the typical approaches presented in the literature and doesn’t refer to the multiloop concept of a current controlled converter. The separation of the variables method is used in the model derivation. The resulting models are presented in the form of an equation set and equivalent circuits. The calculations based on the presented models are verified by measurements and full-wave PSpice simulations.
    Źródło:
    Archives of Electrical Engineering; 2019, 68, 4; 891-905
    1427-4221
    2300-2506
    Pojawia się w:
    Archives of Electrical Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Research on beam supply control strategy based on sliding mode control
    Autorzy:
    Zhang, Hao
    Dong, Haiying
    Zhang, Baoping
    Wu, Tong
    Chen, Changwen
    Powiązania:
    https://bibliotekanauki.pl/articles/141014.pdf
    Data publikacji:
    2020
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    beam supply
    DC/DC converter
    robustness
    sliding mode control
    Opis:
    In the hybrid multiple H-bridge topology of beam supply, the load change of a DC/DC full-bridge converter can greatly affect the output voltage during onsite operation. An improved sliding mode control (SMC) strategy is thus proposed in this paper, where the rate of switching control is added to the law of system equivalent control to create a law that can realize a complete sliding mode control. Considering the special operating conditions of the load can have an influence on the performance of the controller, the impact of uncertainty existing in onsite conditions is suppressed with the proposed strategy utilized. The validity of the proposed strategy, finally, is verified by simulation, which proves the outperformance of the system in both robustness and dynamics.
    Źródło:
    Archives of Electrical Engineering; 2020, 69, 2; 349-364
    1427-4221
    2300-2506
    Pojawia się w:
    Archives of Electrical Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Application of fractional calculus in iterative sliding mode synchronization control
    Autorzy:
    Zhang, Xin
    Wen-Ru, Lu
    Zhang, Liang
    Xu, Wen-Bo
    Powiązania:
    https://bibliotekanauki.pl/articles/141629.pdf
    Data publikacji:
    2020
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    cross-coupling control
    fractional calculus
    iterative learning control
    PD control
    robot arm
    sliding mode control
    Opis:
    In order to control joints of manipulators with high precision, a position tracking control strategy combining fractional calculus with iterative learning control and sliding mode control is proposed for the control of a single joint of manipulators. Considering the coupling between joints of manipulators, a fractional-order iterative sliding mode crosscoupling control strategy is proposed and the theoretical proof of its progressive stability is given. The paper takes a two-joint manipulator as the research object to verify the control strategy of a single-joint manipulator. The results show that the control strategy proposed in this paper makes the two-joint mechanical arm chatter less and the tracking more accurate. The synchronous control of the manipulator is verified by a three-joint manipulator. The results show that the angular displacement adjustment times of the threejoint manipulator are 0.11 s, 0.31 s and 0.24 s, respectively. 3.25 s > 5 s, 3.15 s of a PD cross-coupling control strategy; 2.85 s, 2.32 s, 4.22 s of a PD iterative cross-coupling control strategy; 0.14 s, 0.33 s, 0.28 s of a fractional-order sliding mode cross-coupling control strategy. The root mean square error of the position error of the designed control strategy is 6.47 × 10−6 rad, 3.69 × 10−4 rad, 6.91 × 10−3 rad, respectively. The root mean square error of the synchronization error is 3.96×10−4 rad, 1.36×10−3 rad, 7.81×10−3 rad, superior to the other three control strategies. The results illustrate the effectiveness of the proposed control method.
    Źródło:
    Archives of Electrical Engineering; 2020, 69, 3; 499-519
    1427-4221
    2300-2506
    Pojawia się w:
    Archives of Electrical Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    High-performance induction motor drive based on adaptive super-twisting sliding mode control approach
    Autorzy:
    Farhi, Salah Eddine
    Sakri, Djamel
    Goléa, Noureddine
    Powiązania:
    https://bibliotekanauki.pl/articles/2042783.pdf
    Data publikacji:
    2022
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    barrier function
    chattering
    gains adaptation
    induction motor drive
    sliding mode control
    super twisting
    Opis:
    This paper proposes two high-order sliding mode algorithms to achieve highperformance control of induction motor drive. In the first approach, the super-twisting algorithm (STA) is used to reduce the chattering effect and to improve control accuracy. The second approach combines the super-twisting algorithm with a quasi-barrier function technique. While the super-twisting algorithm (STA) aims at the chattering reduction, the Barrier super-twisting algorithm (BSTA) aims to eliminate this phenomenon by providing continuous output control signals. The BSTA is designed to prevent the STA gain from being over-estimated by making these gains to decrease and increase according to system’s uncertainties. Stability and finite-time convergence are guaranteed using Lyapunov’s theory. In addition, the two controlled variables, rotor speed, and rotor flux modulus are estimated based on the second-order sliding mode (SOSM) observer. Finally, simulations are carried out to compare the performance and robustness of two control algorithms without adding the equivalent control. Tests are achieved under external load torque, varying reference speed, and parameter variations.
    Źródło:
    Archives of Electrical Engineering; 2022, 71, 1; 245-263
    1427-4221
    2300-2506
    Pojawia się w:
    Archives of Electrical Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    A new fuzzy design for switching gain adaptation of sliding mode controller for a wind energy conversion system using a doubly fed induction generator
    Autorzy:
    Horch, Mohamed
    Chemidi, Abdelkarim
    Baghli, Lotfi
    Kadi, Sara
    Powiązania:
    https://bibliotekanauki.pl/articles/2202557.pdf
    Data publikacji:
    2023
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    chattering phenomenon
    doubly fed induction generator
    fuzzy logic gain adaptation
    sliding mode control
    vector control
    wind energy conversion systems
    Opis:
    The paper proposes a newrobust fuzzy gain adaptation of the sliding mode (SMC) power control strategy for the wind energy conversion system (WECS), based on a doubly fed induction generator (DFIG), to maximize the power extracted from the wind turbine (WT). The sliding mode controller can deal with any wind speed, ingrained nonlinearities in the system, external disturbances and model uncertainties, yet the chattering phenomenon that characterizes classical SMC can be destructive. This problem is suitably lessened by adopting adaptive fuzzy-SMC. For this proposed approach, the adaptive switching gains are adjusted by a supervisory fuzzy logic system, so the chattering impact is avoided. Moreover, the vector control of the DFIG as well as the presented one have been used to achieve the control of reactive and active power of the WECS to make the wind turbine adaptable to diverse constraints. Several numerical simulations are performed to assess the performance of the proposed control scheme. The results show robustness against parameter variations, excellent response characteristics with a reduced chattering phenomenon as compared with classical SMC.
    Źródło:
    Archives of Electrical Engineering; 2023, 72, 1; 273--291
    1427-4221
    2300-2506
    Pojawia się w:
    Archives of Electrical Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Finite-time integral sliding mode control for chaotic permanent magnet synchronous motor systems
    Autorzy:
    Chibani, A.
    Daaou, B.
    Gouichiche, A.
    Safa, A.
    Messlem, Y.
    Powiązania:
    https://bibliotekanauki.pl/articles/140698.pdf
    Data publikacji:
    2017
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    chaos control
    control chaotic Permanent Magnet Synchronous Motor
    finite-time
    sliding mode
    Opis:
    In this paper, an integral finite-time sliding mode control scheme is presented for controlling a chaotic permanent magnet synchronous motor (PMSM). The controller can stabilize the system output tracking error to zero in a finite time. Using Lyapunov’s stability theory, the stability of the proposed scheme is verified. Numerical simulation results are presented to present the effectiveness of the proposed approach.
    Źródło:
    Archives of Electrical Engineering; 2017, 66, 2; 229-239
    1427-4221
    2300-2506
    Pojawia się w:
    Archives of Electrical Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    FPGA-based control of output voltage of SRG drive system
    Autorzy:
    Powrózek, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/141099.pdf
    Data publikacji:
    2018
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    switched reluctance generator
    single-pulse mode
    output voltage control
    FPGA-based control
    Opis:
    The paper presents an FPGA-based output voltage control system of a fourphase switched reluctance generator above base speed. The presented control strategy uses a digital PI controller to vary turn-off angle at fixed turn-on angle under single-pulse mode. Simulation tests were conducted based on the simulation model built in the Matlab/Simulink environment. The results of the simulation and laboratory tests as waveforms of voltages and currents are presented. Based on the presented control system, the dependencies of overall efficiency in the function of turn-on angle and ratio of output power to rms phase current (Pout av=Iph rms) in the function of turn-on angle were determined. They allow for the selection of a proper value of turn-on angle for the optimal performance of the generator during the output voltage control. The results obtained from laboratory and simulation tests are discussed in the conclusions.
    Źródło:
    Archives of Electrical Engineering; 2018, 67, 1; 95-108
    1427-4221
    2300-2506
    Pojawia się w:
    Archives of Electrical Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    A hybrid active fault-tolerant control scheme for wind energy conversion system based on permanent magnet synchronous generator
    Autorzy:
    Tahri, A.
    Hassaine, S.
    Moreau, S.
    Powiązania:
    https://bibliotekanauki.pl/articles/140788.pdf
    Data publikacji:
    2018
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    wind energy conversion system
    active fault-tolerant control
    permanent magnet synchronous generator
    sensor fault diagnosis
    sliding mode observer
    Opis:
    Wind energy has achieved prominence in renewable energy production. There- fore, it is necessary to develop a diagnosis system and fault-tolerant control to protect the system and to prevent unscheduled shutdowns. The presented study aims to provide an experimental analysis of a speed sensor fault by hybrid active fault-tolerant control (AFTC) for a wind energy conversion system (WECS) based on a permanent magnet synchronous generator (PMSG). The hybrid AFTC switches between a traditional controller based on proportional integral (PI) controllers under normal conditions and a robust backstepping controller system without a speed sensor to avoid any deterioration caused by the sensor fault. A sliding mode observer is used to estimate the PMSG rotor position. The proposed controller architecture can be designed for performance and robustness separately. Finally, the proposed methodwas successfully tested in an experimental set up using a dSPACE 1104 platform. In this experimental system, the wind turbine with a generator connection via a mechanical gear is emulated by a PMSM engine with controled speed through a voltage inverter. The obtained experimental results show clearly that the proposed method is able to guarantee service production continuity for the WECS in adequate transition.
    Źródło:
    Archives of Electrical Engineering; 2018, 67, 3; 485--497
    1427-4221
    2300-2506
    Pojawia się w:
    Archives of Electrical Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-8 z 8

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