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    Wyświetlanie 1-3 z 3
    Tytuł:
    Analysis of dynamical properties of object tracking system elements
    Autorzy:
    Kuś, Z.
    Powiązania:
    https://bibliotekanauki.pl/articles/199774.pdf
    Data publikacji:
    2016
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    unmanned aerial vehicles
    object tracking
    control system
    dynamical model
    bezzałogowe statki powietrzne
    śledzenie obiektów
    system sterowania
    model dynamiczny
    Opis:
    The goal of this paper was to determine necessary dynamical conditions for the object tracking task. Developing these conditions required examining dynamical relationships between the UAV, camera head, disturbances and tracked object. This analysis was conducted in order to assess whether a given UAV-camera head set was suitable for a given object tracking task. The study assumed that the UAV was equipped with a flight trajectory control system. We discussed the methods of the dynamical properties description and finding a range of application for a particular set “UAV-camera head”. For each dynamical element of the examined system, we proposed a method of computing the parameters of the simulation model which corresponded to the behaviour of the real elements. In order to describe the range of the applications for the UAV-camera head set, we defined the space Ω – all combinations of the parameters which characterized the dynamics of the disturbance and object. Moreover, this study developed the method of selecting the subspace Ωs which described acceptable parameters of the object’s and disturbance’s dynamics. This paper presented the example of proper object tracking in the case of meeting the dynamical conditions and the example of losing the object in the opposite case.
    Źródło:
    Bulletin of the Polish Academy of Sciences. Technical Sciences; 2016, 64, 3; 479-489
    0239-7528
    Pojawia się w:
    Bulletin of the Polish Academy of Sciences. Technical Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Tracking control and robustness study of shifting process
    Autorzy:
    Zhao, X.
    Guan, Ch.
    Powiązania:
    https://bibliotekanauki.pl/articles/223502.pdf
    Data publikacji:
    2018
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    heavy vehicles
    automatic transmission
    shift quality
    PID tracking control
    Monte Carlo method
    pojazdy ciężkie
    skrzynia automatyczna
    zmiana wytrzymałości
    proces kontroli
    metoda Monte Carlo
    Opis:
    Heavy dump vehicles are usually working with big load changes and bad work environment, thus change the friction performance of transmission clutches, as well as great affect the shift quality seriously, which influence the vehicle performance. Many researchers developed a lot to design a useful automatic transmission control system. Using PID tracking control and Monte Carlo method, the controller based on an dynamic model was set up to analyze the shifting process of automatic transmission and its robustness in this paper. The shift process was divided into four stages, low-gear phase, torque phase, inertia phase and high-gear phase. The model presents the process from the first gear to the second gear when the torque has big change. Since the jerk and the friction work of clutch are both related to the speed of clutch which was easier to control, it was chose as the target to control the oil pressure for satisfying the requirement of shift quality. The simulation software, Maplesim and Simulink, were used to build the vehicle model and shifting controller for simulation under different working conditions, and the maximum jerk was changed from 34 m/s3 to 12 m/s3 after the optimization. In this paper the Monte Carlo has been used to quantize and evaluate the robustness of the closed-loop system for the friction coefficients and output torque of turbine variation leading by the friction feature parameters and throttle angle changed. Monte Carlo method was used to analyze the effectiveness and robustness of PID controller, which proves that it has good control effect when the throttle is ongoing minor fluctuations. When the throttle is full opening, a quadratic optimal controller based on disturbance is designed by the method of multi-objective optimization. When it changes within 20 percent, PID controller was designed under the guidance of tracking thoughts. The results also show that the controller could still obtain better effect when the friction coefficient ranged from -40 % to 40 % as well as engine torque changed from -20 % to 20 %, which indicates the robustness of controller.
    Źródło:
    Archives of Transport; 2018, 46, 2; 97-104
    0866-9546
    2300-8830
    Pojawia się w:
    Archives of Transport
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Lyapunov stability based sliding mode observer for sensorless control of permanent magnet synchronous motor
    Autorzy:
    Navaneethan, Soundirarajan
    Kanthalakshmi, Srinivasan
    Aandrew Baggio, S.
    Powiązania:
    https://bibliotekanauki.pl/articles/2173640.pdf
    Data publikacji:
    2022
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    electric vehicles
    permanent magnet synchronous motor
    sensorless control
    sliding mode observer
    Lyapunov stability
    tracking efficiency
    pojazdy elektryczne
    silnik synchroniczny z magnesami trwałymi
    sterowanie bezczujnikowe
    obserwator o ślizgowym trybie pracy
    stabilność Lapunova
    wydajność śledzenia
    Opis:
    In recent years there has been an increasing demand for electric vehicles due to their attractive features including low pollution and increase in efficiency. Electric vehicles use electric motors as primary motion elements and permanent magnet machines found a proven record of use in electric vehicles. Permanent magnet synchronous motor (PMSM) as electric propulsion in electric vehicles supersedes the performance compared to other motor types. However, in order to eliminate the cumbersome mechanical sensors used for feedback, sensorless control of motors has been proposed. This paper proposes the design of sliding mode observer (SMO) based on Lyapunov stability for sensorless control of PMSM. The designed observer is modeled with a simulated PMSM model to evaluate the tracking efficiency of the observer. Further, the SMO is coded using MATLAB/Xilinx block models to investigate the performance at real-time.
    Źródło:
    Bulletin of the Polish Academy of Sciences. Technical Sciences; 2022, 70, 2; art. no. e140353
    0239-7528
    Pojawia się w:
    Bulletin of the Polish Academy of Sciences. Technical Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-3 z 3

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