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    Wyświetlanie 1-4 z 4
    Tytuł:
    Design a robust quantitative feedback theory controller for cyber-physical systems: ship course control problem
    Autorzy:
    Abadi, Ali Soltani Sharif
    Hosseinabadi, Pooyan Alinaghi
    Ordys, Andrew
    Grimble, Michael
    Powiązania:
    https://bibliotekanauki.pl/articles/2175111.pdf
    Data publikacji:
    2022
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    quantitative feedback theory
    Denial-of-Service
    robust control
    cyber-physical systems
    Opis:
    One of the most critical problems in all practical systems is the presence of uncertainties, internal and external disturbances, as well as disturbing noise, which makes the control of the system a challenging task. Another challenge with the physical systems is the possibility of cyber-attacks that the system’s cyber security against them is a critical issue. The systems related to oil and gas industries may also be subjected to cyber-attacks. The subsets of these industries can be mentioned to the oil and gas transmission industry, where ships have a critical role. This paper uses the Quantitative Feedback Theory (QFT) method to design a robust controller for the ship course system, aiming towards desired trajectory tracking. The proposed controller is robust against all uncertainties, internal and external disturbances, noise, and various possible Deception, Stealth, and Denial-of-Service (DOS) attacks. The robust controller for the ship system is designed using the QFT method and the QFTCT toolbox in MATLAB software. Numerical simulations are performed in MATLAB/Simulink for two case studies with disturbances and attacks involving intermittent sinusoidal and random behavior to demonstrate the proposed controller.
    Źródło:
    Archives of Control Sciences; 2022, 32, 3; 589--605
    1230-2384
    Pojawia się w:
    Archives of Control Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    On impact of disturbance in the deployment problem of multi-agent system
    Autorzy:
    Topolewicz, Katarzyna
    Olaru, Sorin
    Girejko, Ewa
    Dórea, Carlos E.T.
    Powiązania:
    https://bibliotekanauki.pl/articles/27312010.pdf
    Data publikacji:
    2023
    Wydawca:
    Polska Akademia Nauk. Czasopisma i Monografie PAN
    Tematy:
    multi-agent systems
    deployment problem
    robust invariant set
    set-theoretic analysis
    disturbance
    Opis:
    The paper is dedicated to the robustness analysis of scalar multi-agent dynamical systems. The open problem we aim to address is the one related to the impact of additive disturbances. Set-theoretic methods are used to achieve the main results in terms of positive invariance and admissible bounds on the disturbances.
    Źródło:
    Archives of Control Sciences; 2023, 33, 2; 299--320
    1230-2384
    Pojawia się w:
    Archives of Control Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Output tracking control of an aircraft subject to additive state dependent disturbance: an optimal control approach
    Autorzy:
    Tanyer, Ilker
    Tatlicioglu, Enver
    Zergeroglu, Erkan
    Powiązania:
    https://bibliotekanauki.pl/articles/1409414.pdf
    Data publikacji:
    2021
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    optimal control
    aerospace applications
    nonlinear systems
    mechanical applications
    mechatronics applications
    robust control
    Opis:
    In this paper, model reference output feedback tracking control of an aircraft subject to additive, uncertain, nonlinear disturbances is considered. In order to present the design steps in a clear fashion: first, the aircraft dynamics is temporarily assumed as known with all the states of the system available. Then a feedback linearizing controller minimizing a performance index while only requiring the output measurements of the system is proposed. As the aircraft dynamics is uncertain and only the output is available, the proposed controller makes use of a novel uncertainty estimator. The stability of the closed loop system and global asymptotic tracking of the proposed method are ensured via Lyapunov based arguments, asymptotic convergence of the controller to an optimal controller is also established. Numerical simulations are presented in order to demonstrate the feasibility and performance of the proposed control strategy.
    Źródło:
    Archives of Control Sciences; 2021, 31, 2; 267-286
    1230-2384
    Pojawia się w:
    Archives of Control Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Explicit commutativity conditions for second-order linear time-varying systems with non-zero initial conditions
    Autorzy:
    Koksal, Mehmet Emir
    Powiązania:
    https://bibliotekanauki.pl/articles/229559.pdf
    Data publikacji:
    2019
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    commutativity
    linear systems
    analogue control
    robust control
    differential
    equations
    non-zero initial conditions
    Opis:
    Although the explicit commutativitiy conditions for second-order linear time-varying systems have been appeared in some literature, these are all for initially relaxed systems. This paper presents explicit necessary and sufficient commutativity conditions for commutativity of second-order linear time-varying systems with non-zero initial conditions. It has appeared interesting that the second requirement for the commutativity of non-relaxed systems plays an important role on the commutativity conditions when non-zero initial conditions exist. Another highlight is that the commutativity of switched systems is considered and spoiling of commutativity at the switching instants is illustrated for the first time. The simulation results support the theory developed in the paper.
    Źródło:
    Archives of Control Sciences; 2019, 29, 3; 529-548
    1230-2384
    Pojawia się w:
    Archives of Control Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-4 z 4

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