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    Wyświetlanie 1-6 z 6
    Tytuł:
    Tracking error analysis method of digital pulse power supply for heavy ion accelerator based on emd reconstruction
    Autorzy:
    Wang, Rongkun
    Sun, Sigun
    Hu, Bingtao
    Powiązania:
    https://bibliotekanauki.pl/articles/221317.pdf
    Data publikacji:
    2020
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    pulse power supply
    tracking error
    EMD
    signal reconstruction
    Opis:
    Assessment of the state of a pulse power supply requires effective and accurate methods to measure and reconstruct the tracking error. This paper proposes a tracking error measurement method for a digital pulse power supply. A de-noising algorithm based on Empirical Mode Decomposition (EMD) is used to analyse the energy of each Intrinsic Mode Function (IMF) component, identify the turning point of energy, and reconstruct the signal to obtain the accurate tracking error. The effectiveness of this EMD method is demonstrated by simulation and actual measurement. Simulation was used to compare the performance of time domain filtering, wavelet threshold de-noising, and the EMD de-noising algorithm. In practical use, the feedback of current on the prototype of the power supply is sampled and analysed as experimental data.
    Źródło:
    Metrology and Measurement Systems; 2020, 27, 2; 339-353
    0860-8229
    Pojawia się w:
    Metrology and Measurement Systems
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Research on disturbance rejection control strategy of vehicle drive axle loading test bench
    Autorzy:
    Yu, Hui
    Wang, Hui
    Li, Nanqi
    Zhao, Guochao
    Powiązania:
    https://bibliotekanauki.pl/articles/2086968.pdf
    Data publikacji:
    2022
    Wydawca:
    Polskie Towarzystwo Mechaniki Teoretycznej i Stosowanej
    Tematy:
    loading test-bed
    disturbance
    adaptive backstepping sliding mode control
    overshoot
    sinusoidal tracking error
    Opis:
    Aiming at the problems of parameter disturbance and coupling disturbance in a vehicle drive axle loading test-bed, this paper used the adaptive backstepping sliding mode control (ABSMC) strategy to design the controller for the speed and torque system. The effectiveness of the controller has been verified by simulation and an experiment. The results show that the equivalent moment of inertia is increased by 5 times, and the step response overshoot of the speed system is 4.1%. By adding a random disturbance, the sinusoidal tracking errors of the speed and torque systems are 0.05 r/min and 0.09Nm, respectively.
    Źródło:
    Journal of Theoretical and Applied Mechanics; 2022, 60, 2; 227--238
    1429-2955
    Pojawia się w:
    Journal of Theoretical and Applied Mechanics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Tracking errors decreasing in CNC system of machine tools
    Zmniejszanie błędów śledzenia w systemach obrabiarek sterowanych numerycznie
    Autorzy:
    Wawrzak, A.
    Karwowski, K.
    Mandra, S.
    Mizan, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/159313.pdf
    Data publikacji:
    2009
    Wydawca:
    Sieć Badawcza Łukasiewicz - Instytut Elektrotechniki
    Tematy:
    system CNC
    kompensacja błędów śledzenia
    CNC system
    tracking error compensation
    on-line calculation
    Opis:
    In the paper the procedures and practical methods of tracking errors compensation in servo-drives are considered. The PID controllers of servo-drives do not decrease tracking errors enough in the case of fast changes of the motion velocity. The good method of decreasing of the tracking errors in cascade servo-drives is to use the feedforward command and feedforward friction compensation. The exemplary results of the test of CNC system based on servo-drives with PMSM motors with proposed control method including the on-line calculation of feedforward loops parameters are presented.
    W pracy przedstawiono procedury i praktyczne metody kompensacji błędów śledzenia w serwonapędach. Regulatory PID serwonapędów nie redukują błędów śledzenia wystarczająco w przypadku szybkich zmian prędkości ruchu. Wskazano, że dobrym sposobem na zmniejszenie błędów śledzenia kaskady serwonapędów jest wykorzystanie pętli sprzężenia wyprzedzającego, także do kompensacji tarcia. Przedstawiono przykładowe wyniki badań układu sterowania numerycznego bazującego na serwonapędach z silnikami synchronicznymi o magnesach trwałych PMSM pracujących według proponowanej metody kompensacji za pomocą pętli sprężenia wyprzedzającego.
    Źródło:
    Prace Instytutu Elektrotechniki; 2009, 240; 85-93
    0032-6216
    Pojawia się w:
    Prace Instytutu Elektrotechniki
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    PER Estimation of AIS in Inland Rivers based on Three Dimensional Ray Tracking
    Autorzy:
    Ma, F.
    Chu, X. M.
    Liu, C. G.
    Powiązania:
    https://bibliotekanauki.pl/articles/117153.pdf
    Data publikacji:
    2014
    Wydawca:
    Uniwersytet Morski w Gdyni. Wydział Nawigacyjny
    Tematy:
    Ray Tracking
    Three Dimensional Ray Tracking
    Automatic Identification System (AIS)
    Package Error Rate (PER)
    Chinese Navigable Waterways
    Inland Shipping
    PER Estimation
    Ray Tracking Model
    Opis:
    The Automatic Identification System (AIS) is an important maritime safety device, which is populous in inland rivers. Compared with that in open sea, the Package Error Rate (PER) of AIS in inland river has increased sharply due to its complex environment. With the help of hardware in loop simulation, it is possible to make statistical calculation on the PER under a given field strength and describe the data by quadratic rational fraction. Meanwhile, in the three dimensional software environments, the signal field strength is able to be calculated by the ray tracking method, which exhausts all the possible propagation paths, including direct way, reflection, diffractions, and the other medium attenuation matters. Beyond that, in the model, the propagation geography information in inland rivers is required to be simplified in some way, or the computation of the ray tracking is too hard to get. The paper set the Changjiang Wuhan channel as the field testing region, and all the deviations are less than 5% in sunny weather, which proves the method accurate and effective.
    Źródło:
    TransNav : International Journal on Marine Navigation and Safety of Sea Transportation; 2014, 8, 1; 89-94
    2083-6473
    2083-6481
    Pojawia się w:
    TransNav : International Journal on Marine Navigation and Safety of Sea Transportation
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Maximum power point tracking techniques for low-cost solar photovoltaic applications – Part II: Mathematical Calculation and Measurement and Comparison, criteria on choices and suitable MPPT techniques
    Autorzy:
    Sutikno, Tole
    Subrata, Arsyad Cahya
    Pau, Giovanni
    Jusoh, Awang
    Ishaque, Kashif
    Powiązania:
    https://bibliotekanauki.pl/articles/24202731.pdf
    Data publikacji:
    2023
    Wydawca:
    Polska Akademia Nauk. Czasopisma i Monografie PAN
    Tematy:
    Incremental Conductance
    maximum power point tracking
    Measurement and Comparison
    Perturb and Observe
    solar photovoltaic
    trial-and-error
    Opis:
    In the last decade, there has been a substantial surge in the advancement of research into the maximum power point tracking (MPPT) controller. The MPPT approaches, on the other hand, continue to be in high demand due to the ease and simplicity with which tracking techniques can be implemented on the maximum power point (MPP). Diverse MPPT approaches and their modifications from various literature are categorized and thoroughly explored in this work, which is divided into two sections. The discussions are centered on the primary goal of attaining the most extraordinary feasible MPPT technique that produces the best results at the lowest possible expense. In order to determine which MPPT approaches to use, evaluations from earlier literature are used to guide the decision. In this section, we will examine the evaluation of the MPPT technique in two sections. Previously, in Part I, we explored the MPPT techniques based on constant parameters and trial-and- error. Part II of this article will examine the MPPT technique, which is based on mathematical computation, measurement, and comparison, and the algorithm development that has occurred in recent years. Furthermore, this section’s assessment for selecting MPPT approaches is based on previous literature reviews. To aid with this selection, the following criteria for the MPPT approach are proposed: sensors and analog/digital requirements, costeffectiveness, simplicity, stability, efficiency, and tracking speed. This enables the reader to select the MPPT technique that is most appropriate for their application.
    Źródło:
    Archives of Electrical Engineering; 2023, 72, 2; 299--322
    1427-4221
    2300-2506
    Pojawia się w:
    Archives of Electrical Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Maximum power point tracking techniques for low-cost solar photovoltaic applications – Part I: constant parameters and trial-and-error
    Autorzy:
    Sutikno, Tole
    Cahya Subrata, Arsyad
    Pau, Giovanni
    Jusoh, Awang
    Ishaque, Kashif
    Powiązania:
    https://bibliotekanauki.pl/articles/2202545.pdf
    Data publikacji:
    2023
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    incremental conductance
    maximum power point tracking
    measurement and comparison
    perturb and observe
    solar photovoltaic (PV)
    trial-and-error
    Opis:
    The development of research on the maximum power point tracking (MPPT) controller has increased significantly in this decade. The MPPT technique, however, is still demanding because of the ease and simplicity of implementing tracking technique on the maximum power point (MPP). In this paper, MPPT techniques and their modifications from various literature are classified and examined in detail. The discussions are focused on the main objective of obtaining the best possible MPPT technique with the best results at a low cost. The assessment for the selection of MPPT techniques is based on assessments from the previous literature. The discussion of the MPPT technique assessment is divided into two parts. In Part I, the MPPT technique based on constant parameters, and trial-and-error will be discussed in detail, along with its algorithm development in recent times.
    Źródło:
    Archives of Electrical Engineering; 2023, 72, 1; 125--145
    1427-4221
    2300-2506
    Pojawia się w:
    Archives of Electrical Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-6 z 6

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