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Wyszukujesz frazę "system stability analysis" wg kryterium: Temat

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    Wyświetlanie 1-8 z 8
    Tytuł:
    The use of the linear form of dynamical equations of the satellite attitude control system for its analysis and synthesis
    Autorzy:
    Moldabekov, Meirbek
    Sukhenko, Anna
    Shapovalova, Darya
    Yelubayev, Suleimen
    Powiązania:
    https://bibliotekanauki.pl/articles/1839688.pdf
    Data publikacji:
    2021
    Wydawca:
    Polskie Towarzystwo Mechaniki Teoretycznej i Stosowanej
    Tematy:
    synthesis
    stability analysis
    attitude control system
    satellite
    Opis:
    At present, the methods based on using linearized dynamical equations are applied for syn- thesis of an attitude control system of a satellite with nonlinear dynamics. Linearized equa- tions describe the satellite dynamics approximately, which is the main their disadvantage. This article shows that basing on the angular momentum theorem, the nonlinear dynamical equations of the satellite attitude control system can be represented in the form of linear differential equations with variable coefficients, which makes it possible to use engineering methods of stability analysis and analysis of transient quality in the process of synthesis of the satellite attitude control system.
    Źródło:
    Journal of Theoretical and Applied Mechanics; 2021, 59, 1; 109-120
    1429-2955
    Pojawia się w:
    Journal of Theoretical and Applied Mechanics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Local analysis of hybrid systems on polyhedral sets with state-dependent switching
    Autorzy:
    Leth, J.
    Wisniewski, R.
    Powiązania:
    https://bibliotekanauki.pl/articles/330556.pdf
    Data publikacji:
    2014
    Wydawca:
    Uniwersytet Zielonogórski. Oficyna Wydawnicza
    Tematy:
    inkluzja różniczkowa
    badanie stabilności
    układ hybrydowy
    stability analysis
    switched system
    hybrid system
    differential inclusion
    Opis:
    This paper deals with stability analysis of hybrid systems. Various stability concepts related to hybrid systems are introduced. The paper advocates a local analysis. It involves the equivalence relation generated by reset maps of a hybrid system. To establish a tangible method for stability analysis, we introduce the notion of a chart, which locally reduces the complexity of the hybrid system. In a chart, a hybrid system is particularly simple and can be analyzed with the use of methods borrowed from the theory of differential inclusions. Thus, the main contribution of this paper is to show how stability of a hybrid system can be reduced to a specialization of the well established stability theory of differential inclusions. A number of examples illustrate the concepts introduced in the paper.
    Źródło:
    International Journal of Applied Mathematics and Computer Science; 2014, 24, 2; 341-355
    1641-876X
    2083-8492
    Pojawia się w:
    International Journal of Applied Mathematics and Computer Science
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Stability analysis of interconnected discrete-time fractional-order LTI state-space systems
    Autorzy:
    Grzymkowski, Łukasz
    Trofimowicz, Damian
    Stefański, Tomasz P.
    Powiązania:
    https://bibliotekanauki.pl/articles/1838161.pdf
    Data publikacji:
    2020
    Wydawca:
    Uniwersytet Zielonogórski. Oficyna Wydawnicza
    Tematy:
    stability analysis
    discrete time system
    fractional order system
    analiza stabilności
    układ czasu dyskretnego
    układ rzędu ułamkowego
    Opis:
    In this paper, a stability analysis of interconnected discrete-time fractional-order (FO) linear time-invariant (LTI) state-space systems is presented. A new system is formed by interconnecting given FO systems using cascade, feedback, parallel interconnections. The stability requirement for such a system is that all zeros of a non-polynomial characteristic equation must be within the unit circle on the complex z-plane. The obtained theoretical results lead to a numerical test for stability evaluation of interconnected FO systems. It is based on modern root-finding techniques on the complex plane employing triangulation of the unit circle and Cauchy’s argument principle. The developed numerical test is simple, intuitive and can be applied to a variety of systems. Furthermore, because it evaluates the function related to the characteristic equation on the complex plane, it does not require computation of state-matrix eigenvalues. The obtained numerical results confirm the efficiency of the developed test for the stability analysis of interconnected discrete-time FO LTI state-space systems.
    Źródło:
    International Journal of Applied Mathematics and Computer Science; 2020, 30, 4; 649-658
    1641-876X
    2083-8492
    Pojawia się w:
    International Journal of Applied Mathematics and Computer Science
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Research on stability and sensitivity of the rotating machines with overhung rotors to lateral vibrations
    Autorzy:
    Szolc, Tomasz
    Konowrocki, Robert
    Powiązania:
    https://bibliotekanauki.pl/articles/2090690.pdf
    Data publikacji:
    2021
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    overhung rotor-shaft
    lateral vibrations
    stability analysis
    sensitivity analysis
    system imperfection
    wał wirnika
    drgania boczne
    analiza stabilności
    analiza wrażliwości
    niedoskonałość systemu
    Opis:
    The rotating machines with overhung rotors form a broad class of devices used in many types of industry. For this kind of rotor machine in the paper, there is investigated an inf luence of dynamic and static unbalance of a rotor, parallel and angular misalignments of shafts, and inner anisotropy of rigid couplings on system dynamic responses. The considerations are performed through a hybrid structural model of the machine rotor-shaft system, consisting of continuous beam finite elements and discrete oscillators. Numerical calculations are carried out for parameters characterizing a heavy blower applied in the mining industry. The main goal of the research is to assess the sensitivity of the imperfections mentioned above on excitation severity of rotor-shaft lateral vibrations and motion stability of the machine in question.
    Źródło:
    Bulletin of the Polish Academy of Sciences. Technical Sciences; 2021, 69, 6; e137987, 1--13
    0239-7528
    Pojawia się w:
    Bulletin of the Polish Academy of Sciences. Technical Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    A study of landslide body control of black bovine cave copper ore mining and beneficiation project
    Autorzy:
    Wu, Hanhui
    Powiązania:
    https://bibliotekanauki.pl/articles/27312086.pdf
    Data publikacji:
    2023
    Wydawca:
    Polska Akademia Nauk. Czasopisma i Monografie PAN
    Tematy:
    jaskinia
    ruda miedzi
    korpus osuwiska
    analiza stabilności
    system kontroli
    cave
    copper ore
    landslide body
    stability analysis
    control scheme
    Opis:
    Landslide is a common geological disaster which causes huge losses to people’s properties and national economic development. How to prevent and control landslides has become an important issue. This article introduces the geological and geographical environment of the landslide body, analyzes the basic characteristics of the landslide, calculates the landslide stability based on the ultimate equilibrium theory-based transfer coefficient method, discusses the development trend of the landslide and comes up with corresponding control schemes by taking the landslide body of Black Bovine Cave Copper Ore Mining & Beneficiation Project as example. It is found that the control scheme - “anti-slide pile + retraining wall + baffle + anchor cable” can be used to effectively prevent and control the geological disaster according to calculation. The study results can provide a reference for landslide body control.
    Źródło:
    Archives of Civil Engineering; 2023, 69, 2; 291--309
    1230-2945
    Pojawia się w:
    Archives of Civil Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Vibration control and performance analysis of full car active suspension system using fractional order terminal sliding mode controller
    Autorzy:
    Yuvapriya, T.
    Lakshami, P.
    Rajendiran, S.
    Powiązania:
    https://bibliotekanauki.pl/articles/230099.pdf
    Data publikacji:
    2020
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    active suspension system
    fractional order terminal sliding mode controller
    ISO8608
    ISO2631
    stability analysis
    vibration dose value
    Opis:
    The main goal of introducing Active Suspension System in vehicles is to reduce the vehicle body motion under road obstacles which improves the ride comfort of the passenger. In this paper, the Full Car Model (FCM) with seven Degrees of Freedom is considered and simulated by MATLAB/Simulink. The Terminal Sliding Mode Controller (TSMC) and Fractional Order Terminal Sliding Mode Controller (FOTSMC) are designed to enhance the ride quality, stability and passenger comfort for FCM. The designed FOTSMC has the ability to provide higher control accuracy in a finite time. The performances of the designed controllers are evaluated by measuring the vehicle body vibration in both angular and vertical direction under bump input and ISO-8608 random input against passive suspension system. The Frequency Weighted Root Mean Square (FWRMS) and Vibration dose value of Body Acceleration as per ISO-2631 are evaluated for FOTSMC, TSMC and PSS. The stability of the FCM is proved by Lyapunouv theory. Further analysis with sprung mass and speed variation of FCM demonstrate the robustness of proposed controller. To investigate the performances of designed controllers, comparison is made with existing Sliding Mode Controller (SMC) which proves that the designed FOTSMC performs better than existing SMC.
    Źródło:
    Archives of Control Sciences; 2020, 30, 2; 295-324
    1230-2384
    Pojawia się w:
    Archives of Control Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Normalized finite fractional differences: Computational and accuracy breakthroughs
    Autorzy:
    Stanisławski, R.
    Latawiec, K. J.
    Powiązania:
    https://bibliotekanauki.pl/articles/331334.pdf
    Data publikacji:
    2012
    Wydawca:
    Uniwersytet Zielonogórski. Oficyna Wydawnicza
    Tematy:
    różnica ułamkowa
    różnica Grünwalda-Letnikowa
    analiza stabilności
    system adaptacyjny
    fractional difference
    Grünwald-Letnikov difference
    stability analysis
    recursive computation
    adaptive systems
    Opis:
    This paper presents a series of new results in finite and infinite-memory modeling of discrete-time fractional differences. The introduced normalized finite fractional difference is shown to properly approximate its fractional difference original, in particular in terms of the steady-state properties. A stability analysis is also presented and a recursive computation algorithm is offered for finite fractional differences. A thorough analysis of computational and accuracy aspects is culminated with the introduction of a perfect finite fractional difference and, in particular, a powerful adaptive finite fractional difference, whose excellent performance is illustrated in simulation examples.
    Źródło:
    International Journal of Applied Mathematics and Computer Science; 2012, 22, 4; 907-919
    1641-876X
    2083-8492
    Pojawia się w:
    International Journal of Applied Mathematics and Computer Science
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Determination of parameters for a design of the stable electro-dynamic passive magnetic support of a high-speed flexible rotor
    Autorzy:
    Szolc, T.
    Falkowski, F.
    Henzel, M.
    Kurnyta-Mazurek, P.
    Powiązania:
    https://bibliotekanauki.pl/articles/201250.pdf
    Data publikacji:
    2019
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    rotor dynamics
    electrodynamic passive magnetic bearings
    active magnetic damper
    stability analysis
    rotor- shaft system
    dynamika rotora
    wirnik
    amortyzator magnetyczny
    analiza stabilności
    pasywne łożysko magnetyczne
    Opis:
    Electro-dynamic passive magnetic bearings are now viewed as a feasible option when looking for support for high-speed rotors. Nevertheless, because of the skew-symmetrical visco-elastic properties of such bearings, they are prone to operational instability. In order to avoid this, the paper proposes the addition of external damping into the newly designed vibrating laboratory rotor-shaft system. This may be achieved by means of using simple passive dampers that would be found among the components of the electro-dynamic bearing housings along with magnetic dampers, which satisfy the operational principles of active magnetic bearings. Theoretical investigations are going to be conducted by means of a structural computer model of the rotor-shaft under construction, which will take into consideration its actual dimensions and material properties. The additional damping magnitudes required to stabilize the most sensitive lateral eigenmodes of the object under consideration have been determined by means of the Routh-Hurwitz stability criterion.
    Źródło:
    Bulletin of the Polish Academy of Sciences. Technical Sciences; 2019, 67, 1; 91-105
    0239-7528
    Pojawia się w:
    Bulletin of the Polish Academy of Sciences. Technical Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-8 z 8

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