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Wyszukujesz frazę "regulator PI" wg kryterium: Temat

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    Wyświetlanie 1-4 z 4
    Tytuł:
    The use of a non-integer order PI controller with an active queue management mechanism
    Autorzy:
    Domański, A.
    Domańska, J.
    Czachórski, T.
    Klamka, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/331094.pdf
    Data publikacji:
    2016
    Wydawca:
    Uniwersytet Zielonogórski. Oficyna Wydawnicza
    Tematy:
    active queue management
    PI controller
    dropping packets
    fractional calculus
    aktywne zarządzanie kolejkami
    regulator PI
    pochodna ułamkowa
    Opis:
    In this paper the performance of a fractional order PI controller is compared with that of RED, a well-known active queue management (AQM) mechanism. The article uses fluid flow approximation and discrete-event simulation to investigate the influence of the AQM policy on the packet loss probability, the queue length and its variability. The impact of self-similar traffic is also considered.
    Źródło:
    International Journal of Applied Mathematics and Computer Science; 2016, 26, 4; 777-789
    1641-876X
    2083-8492
    Pojawia się w:
    International Journal of Applied Mathematics and Computer Science
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The IoT gateway with active queue management
    Autorzy:
    Domański, Adam
    Domańska, Joanna
    Czachórski, Tadeusz
    Klamka, Jerzy
    Szyguła, Jakub
    Marek, Dariusz
    Powiązania:
    https://bibliotekanauki.pl/articles/1838178.pdf
    Data publikacji:
    2021
    Wydawca:
    Uniwersytet Zielonogórski. Oficyna Wydawnicza
    Tematy:
    active queue management
    PI controller
    dropping packets
    fractional calculus
    IoT gateway
    aktywne zarządzanie kolejkami
    regulator PI
    pochodna ułamkowa
    Internet Rzeczy
    Opis:
    As the traffic volume from various Internet of things (IoT) networks increases significantly, the need for adapting the quality of service (QoS) mechanisms to the new Internet conditions becomes essential. We propose a QoS mechanism for the IoT gateway based on packet classification and active queue management (AQM). End devices label packets with a special packet field (type of service (ToS) for IPv4 or traffic class (TC) for IPv6) and thus classify them as priority for real-time IoT traffic and non-priority for standard IP traffic. Our AQM mechanism drops only non-priority packets and thus ensures that real-time traffic packets for critical IoT systems are not removed if the priority traffic does not exceed the maximum queue capacity. This AQM mechanism is based on the PIα controller with non-integer integration order. We use fluid flow approximation and discrete event simulation to determine the influence of the AQM policy on the packet loss probability, queue length and its variability. The impact of the long-range dependent (LRD) traffic is also considered. The obtained results show the properties of the proposed mechanism and the merits of the PIα controller.
    Źródło:
    International Journal of Applied Mathematics and Computer Science; 2021, 31, 1; 165-178
    1641-876X
    2083-8492
    Pojawia się w:
    International Journal of Applied Mathematics and Computer Science
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Mathematical and simulation modeling of dual active bridge
    Autorzy:
    Barlik, Roman
    Grzejszczak, Piotr
    Koszel, Mikołaj
    Powiązania:
    https://bibliotekanauki.pl/articles/2173709.pdf
    Data publikacji:
    2022
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    dual active bridge
    small-signal analysis
    averaged model
    transfer function
    parasitics
    PI controller
    podwójny mostek aktywny
    analiza małosygnałowa
    model uśredniony
    funkcja przenoszenia
    pasożyty
    regulator PI
    Opis:
    The paper is a structured, in-depth analysis of dual active bridge modeling. In the research new, profound dual active bridge converter (DAB) circuit model is presented. Contrary to already described idealized models, all critical elements including numerous parasitic components were described. The novelty is the consideration of a threshold voltage of diodes and transistors in the converter equations. Furthermore, a lossy model of leakage inductance in an AC circuit is also included. Based on the circuit equations, a small-signal dual active bridge converter model is described. That led to developing control of the input and output transfer function of the dual active bridge converter model. The comparison of the idealized model, circuit simulation (PLECS), and an experimental model was conducted methodically and confirmed the high compatibility of the introduced mathematical model with the experimental one. Proposed transfer functions can be used when designing control of systems containing multiple converters accelerating the design process, and accurately reproducing the existing systems, which was also reported in the paper.
    Źródło:
    Bulletin of the Polish Academy of Sciences. Technical Sciences; 2022, 70, 5; art. no. e142653
    0239-7528
    Pojawia się w:
    Bulletin of the Polish Academy of Sciences. Technical Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Reparation of voltage disturbance using PR controller-based DVR in Modern power systems
    Autorzy:
    Danalakshmi, D.
    Prathiba, Srividya
    Ettappan, M.
    Krishna, Mohan D.
    Powiązania:
    https://bibliotekanauki.pl/articles/1839555.pdf
    Data publikacji:
    2021
    Wydawca:
    Stowarzyszenie Menedżerów Jakości i Produkcji
    Tematy:
    smart grid
    jakość energii elektrycznej
    regulator PI i PR
    ewolucja
    DVR
    współczynnik zawartości harmonicznych
    power quality
    PI and PR controller
    self balanced differential
    evolution
    dynamic voltage restorer
    total harmonic distortion
    Opis:
    The Smart Grid environment gives more benefits for the consumers, whereas the power quality is one of the challenging factors in the smart grid environment. To protect the system equipment and increase the reliability, different filter technologies are used. Even though, consumers’ expectations towards the power quality are not fulfilled. To overcome these drawbacks and enhance the system reliability, a new Custom Power Devices (CPD) are introduced in the system. Among different CPDs, the Dynamic Voltage Restorer (DVR) is one of the voltage compensating devices that is used to improve the power quality during distortions. When the distortions such as voltage swell and sag occur in the distribution system, the control strategy in the DVR plays a significant role. In this article, the DVR performance using Proportional Integral (PI), Proportional Resonant (PR) controllers are analyzed. A robust optimization algorithm called Self Balanced Differential Evolution (SBDE) is used to find the optimal gain values of the controllers in order to reach the target of global minimum error and obtain fast response. Then, a comparative analysis is performed between different controllers and verified that the performance of PR controller is superior than the other controllers. It has been found that the proposed PR controller strategy reduces the Total Harmonic Distortion (THD) values for all types of faults. The proposed SBDE optimized DVR with PR controller reduces the THD value less than 4% under voltage distoration condition. The DVR topology is validated in MATLAB/SIMULINK in order to detect the disturbance and inject the voltage to compensate the load voltage.
    Źródło:
    Production Engineering Archives; 2021, 27, 1; 16-29
    2353-5156
    2353-7779
    Pojawia się w:
    Production Engineering Archives
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-4 z 4

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