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    Wyświetlanie 1-10 z 10
    Tytuł:
    A Problem of Robust Control of a System With Time Delay
    Autorzy:
    Blizorukova, M.
    Kappel, F.
    Maksimov, V.
    Powiązania:
    https://bibliotekanauki.pl/articles/908081.pdf
    Data publikacji:
    2001
    Wydawca:
    Uniwersytet Zielonogórski. Oficyna Wydawnicza
    Tematy:
    sterowanie
    system opóźniania
    robust control
    system with time delay
    Opis:
    A problem of guaranteed control is under discussion. This problem consists in the attainment of a given target set by a phase trajectory of a system described by an equation with time delay. An uncontrolled disturbance (along with a control) is assumed to act upon the system. An algorithm for solving the problem in the case when information on a phase trajectory is incomplete (measurements of a 'part' of coordinates) is designed. The algorithm is stable with respect to informational noises and computational errors.
    Źródło:
    International Journal of Applied Mathematics and Computer Science; 2001, 11, 4; 821-834
    1641-876X
    2083-8492
    Pojawia się w:
    International Journal of Applied Mathematics and Computer Science
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Robust Dynamic Input Reconstruction for Delay Systems
    Autorzy:
    Kappel, F.
    Maksimov, V.
    Powiązania:
    https://bibliotekanauki.pl/articles/911173.pdf
    Data publikacji:
    2000
    Wydawca:
    Uniwersytet Zielonogórski. Oficyna Wydawnicza
    Tematy:
    system opóźniania
    obserwacja
    delay system
    input reconstruction
    observation
    robust algorithm
    Opis:
    A problem of reconstruction of a non-observable control input for a system with a time delay is analyzed within the framework of the dynamical input reconstruction approach (see Kryazhimskii and Osipov, 1987; Osipov and Kryazhimskii, 1995; Osipov et al., 1991). In (Maksimov, 1987; 1988) methods of dynamical input reconstruction were described for delay systems with fully observable states. The present paper provides an input reconstruction algorithm for partially observable systems. The algorithm is robust to the observation perturbations.
    Źródło:
    International Journal of Applied Mathematics and Computer Science; 2000, 10, 2; 283-307
    1641-876X
    2083-8492
    Pojawia się w:
    International Journal of Applied Mathematics and Computer Science
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    A Lyapunov functional for a system with a time-varying delay
    Autorzy:
    Duda, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/331415.pdf
    Data publikacji:
    2012
    Wydawca:
    Uniwersytet Zielonogórski. Oficyna Wydawnicza
    Tematy:
    funkcjonał Lapunowa
    system opóźniania
    Lyapunov functional
    time delay system
    LTI system
    Opis:
    The paper presents a method to determine a Lyapunov functional for a linear time-invariant system with an interval time-varying delay. The functional is constructed for the system with a time-varying delay with a given time derivative, which is calculated on the system trajectory. The presented method gives analytical formulas for the coefficients of the Lyapunov functional.
    Źródło:
    International Journal of Applied Mathematics and Computer Science; 2012, 22, 2; 327-337
    1641-876X
    2083-8492
    Pojawia się w:
    International Journal of Applied Mathematics and Computer Science
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Robust stability of positive linear time delay systems under time-varying perturbations
    Autorzy:
    Ngoc, P. H. A.
    Tinh, C. T.
    Powiązania:
    https://bibliotekanauki.pl/articles/200075.pdf
    Data publikacji:
    2015
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    robust stability
    delay system
    time-varying perturbation
    stabilność
    system opóźniania
    perturbacja
    Opis:
    By a novel approach, we get explicit robust stability bounds for positive linear time-invariant time delay differential systems subject to time-varying structured perturbations or non-linear time-varying perturbations. Some examples are given to illustrate the obtained results. To the best of our knowledge, the results of this paper are new.
    Źródło:
    Bulletin of the Polish Academy of Sciences. Technical Sciences; 2015, 63, 4; 947-954
    0239-7528
    Pojawia się w:
    Bulletin of the Polish Academy of Sciences. Technical Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The revision and extension of the RMS ring for time delay systems
    Autorzy:
    Pekař, L.
    Prokop, R.
    Powiązania:
    https://bibliotekanauki.pl/articles/200559.pdf
    Data publikacji:
    2017
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    time delay system
    ring
    Bézout domain
    coprime factorization
    system opóźniania
    pierścień
    domena Bézout
    Opis:
    This paper is aimed at reviewing the ring of retarded quasipolynomial meromorphic functions (RMS) that was recently introduced as a convenient control design tool for linear, time-invariant time delay systems (TDS). It has been found by the authors that the original definition does not constitute a ring and has some essential deficiencies, and hence it could not be used for an algebraic control design without a thorough reformulation which i.a. extends the usability to neutral TDS and to those with distributed delays. This contribution summarizes the original definition of RMS simply highlights its deficiencies via examples, and suggests a possible new extended definition. Hence, the new ring of quasipolynomial meromorphic functions RQM is established to avoid confusion. The paper also investigates and introduces selected algebraic properties supported by some illustrative examples and concisely outlines its use in controller design.
    Źródło:
    Bulletin of the Polish Academy of Sciences. Technical Sciences; 2017, 65, 3; 341-349
    0239-7528
    Pojawia się w:
    Bulletin of the Polish Academy of Sciences. Technical Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Detection and Regulation Problems for Discrete-Time Distributed Systems With Delays
    Autorzy:
    Namir, A.
    Lahmidi, F.
    Alif, O.
    Powiązania:
    https://bibliotekanauki.pl/articles/908301.pdf
    Data publikacji:
    1999
    Wydawca:
    Uniwersytet Zielonogórski. Oficyna Wydawnicza
    Tematy:
    detekcja
    system dyskretny
    system opóźniania
    discrete and delay systems
    regulation
    unknown inputs
    detection
    Opis:
    A distributed discrete-time hereditary system is considered. An unknown input is supposed to be a perturbation. First, we investigate the possibility of reconstructing this input using the information provided by an output equation. Then we treat the problem of keeping the observation as close as possible to some desired values (with the system still perturbed by the unknown input). To illustrate the results, some examples are presented.
    Źródło:
    International Journal of Applied Mathematics and Computer Science; 1999, 9, 2; 347-369
    1641-876X
    2083-8492
    Pojawia się w:
    International Journal of Applied Mathematics and Computer Science
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Delay-dependent Asymptotic Stabilitzation for Uncertain Time-delay Systems with Saturating Actuators
    Autorzy:
    Liu, P. L.
    Powiązania:
    https://bibliotekanauki.pl/articles/908496.pdf
    Data publikacji:
    2005
    Wydawca:
    Uniwersytet Zielonogórski. Oficyna Wydawnicza
    Tematy:
    stabilność
    system opóźniania
    równanie Riccatiego
    stability
    delay-dependency
    time delay system
    Riccati equation
    Opis:
    This paper concerns the issue of robust asymptotic stabilization for uncertain time-delay systems with saturating actuators. Delay-dependent criteria for robust stabilization via linear memoryless state feedback have been obtained. The resulting upper bound on the delay time is given in terms of the solution to a Riccati equation subject to model transformation. Finally, examples are presented to show the effectiveness of our result.
    Źródło:
    International Journal of Applied Mathematics and Computer Science; 2005, 15, 1; 45-51
    1641-876X
    2083-8492
    Pojawia się w:
    International Journal of Applied Mathematics and Computer Science
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Szegos First Limit Theorem in Terms of a Realization of a Continuous-Time Time-Varying System
    Autorzy:
    Iglesias, P. A.
    Zang, G.
    Powiązania:
    https://bibliotekanauki.pl/articles/908132.pdf
    Data publikacji:
    2001
    Wydawca:
    Uniwersytet Zielonogórski. Oficyna Wydawnicza
    Tematy:
    system opóźniania
    teoria systemów
    time varying systems
    exponential dichotomies
    coprime
    inner/outer factorizations
    Opis:
    It is shown that the limit in an abstract version of Szego's limit theorem can be expressed in terms of the antistable dynamics of the system. When the system dynamics are regular, it is shown that the limit equals the difference between the antistable Lyapunov exponents of the system and those of its inverse. In the general case, the elements of the dichotomy spectrum give lower and upper bounds.
    Źródło:
    International Journal of Applied Mathematics and Computer Science; 2001, 11, 6; 1261-1276
    1641-876X
    2083-8492
    Pojawia się w:
    International Journal of Applied Mathematics and Computer Science
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Robust Stabilization for Uncertain Time-Varying Delay Constrained Systems With Delay-Dependence
    Autorzy:
    Han, Q. L.
    Mehdi, D.
    Powiązania:
    https://bibliotekanauki.pl/articles/908298.pdf
    Data publikacji:
    1999
    Wydawca:
    Uniwersytet Zielonogórski. Oficyna Wydawnicza
    Tematy:
    system opóźniania
    stabilizacja
    odporność na błędy
    time-delay systems
    stabilization
    robustness
    nonlinear parametric perturbations
    saturating actuators
    Opis:
    This paper is concerned with the problem of robust stabilization of linear time-varying delay systems containing saturating actuators in the presence of nonlinear parametric perturbations. Based on Razumikhin's approach to the stability of functional differential equations, we determine upper bounds on the time-varying delay such that the uncertain system under consideration is robustly globally or locally asymptotically stabilizable via memoryless state feedback control laws. The obtained bounds are given in terms of solutions to Lyapunov equations. Two numerical examples are included to illustrate the results.
    Źródło:
    International Journal of Applied Mathematics and Computer Science; 1999, 9, 2; 293-311
    1641-876X
    2083-8492
    Pojawia się w:
    International Journal of Applied Mathematics and Computer Science
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Motion Planning, Equivalence, Infinite Dimensional Systems
    Autorzy:
    Rouchon, P.
    Powiązania:
    https://bibliotekanauki.pl/articles/908322.pdf
    Data publikacji:
    2001
    Wydawca:
    Uniwersytet Zielonogórski. Oficyna Wydawnicza
    Tematy:
    metoda elementów skończonych
    układ sterowania
    system opóźniania
    infinite dimensional control systems
    motion planning
    flatness
    absolute equivalence
    Pfaffian systems
    delay systems
    Gevrey functions
    Opis:
    Motion planning, i.e., steering a system from one state to another, is a basic question in automatic control. For a certain class of systems described by ordinary differential equations and called flat systems (Fliess et al., 1995; 1999a), motion planning admits simple and explicit solutions. This stems from an explicit description of the trajectories by an arbitrary time function y, the flat output, and a finite number of its time derivatives. Such explicit descriptions are related to old problems on Monge equations and equivalence investigated by Hilbert and Cartan. The study of several examples (the car with n-trailers and the non-holonomic snake, pendulums in series and the heavy chain, the heat equation and the Euler-Bernoulli flexible beam) indicates that the notion of flatness and its underlying explicit description can be extended to infinite-dimensional systems. As in the finite-dimensional case, this property yields simple motion planning algorithms via operators of compact support. For the non-holonomic snake, such operators involve non-linear delays. For the heavy chain, they are defined via distributed delays. For heat and Euler-Bernoulli systems, their supports are reduced to a point and their definition domain coincides with the set of Gevrey functions of order 2.
    Źródło:
    International Journal of Applied Mathematics and Computer Science; 2001, 11, 1; 165-188
    1641-876X
    2083-8492
    Pojawia się w:
    International Journal of Applied Mathematics and Computer Science
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-10 z 10

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