Temat: fractional order systems - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Fractional Kalman Filter algorithms for correlated system and measurement noises
Autorzy:: Sierociuk, D.
Powiązania:: https://bibliotekanauki.pl/articles/206137.pdf
Data publikacji:: 2013
Wydawca:: Polska Akademia Nauk. Instytut Badań Systemowych PAN
Tematy:: fractional order calculus
discrete fractional state-space systems
fractional Kalman filter
Opis:: The paper presents a generalization of the Fractional Kalman Filter to a case when correlated system and measurement noises appear. The algorithm proposed is derived in detail for a linear generalized discrete fractional order state-space system for both constant and variable order cases. In order to present the efficiency of the proposed algorithm, results of numerical simulations are presented. Results of numerical experiments are compared with the effect of estimation obtained when using the traditional Fractional Kalman Filter algorithm.
Źródło:: Control and Cybernetics; 2013, 42, 2; 471-490
0324-8569
Pojawia się w:: Control and Cybernetics
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Fractional order PI controllers for TCP packet flow ensuring given modulus margins
Autorzy:: Krajewski, W.
Viaro, U.
Powiązania:: https://bibliotekanauki.pl/articles/205939.pdf
Data publikacji:: 2014
Wydawca:: Polska Akademia Nauk. Instytut Badań Systemowych PAN
Tematy:: fractional-order PI controllers
robust control
TCP congestion control
delayed systems
Opis:: An Active Queue Management (AQM) robust control strategy for Traffic Control Protocol (TCP) data transfer is proposed. To this purpose, the TCP behaviour is first approximated by a second–order model with delayed input obtained from the linearization of an efficient and commonly used nonlinear fluid–based model. The adopted feedback control structure uses a fractional– order PI controller. To ensure the desired robustness, the parameter regions where such a controller guarantees a given modulus margin (inverse of the H1 norm of the sensitivity function) are derived. An example commonly used in the literature is worked out to show that the suggested graphically–based design technique is simple to apply while it limits the effects of disturbances and of the unmodelled dynamics.
Źródło:: Control and Cybernetics; 2014, 43, 4; 493-505
0324-8569
Pojawia się w:: Control and Cybernetics
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: Note on describing function analysis of fractional order nonlinear control systems
Autorzy:: Yeroglu, C.
Tan, N.
Powiązania:: https://bibliotekanauki.pl/articles/206045.pdf
Data publikacji:: 2015
Wydawca:: Polska Akademia Nauk. Instytut Badań Systemowych PAN
Tematy:: describing function
fractional order control
limit cycle
nonlinear systems
relay auto-tuning
stability margin
Opis:: This paper presents extensions of some results, obtained for the analysis of classical nonlinear control systems, to the nonlinear fractional order systems. It is shown that the results related to limit cycle prediction using describing function method can be applied to the fractional order plants. The frequency and the amplitude of the limit cycle are used for auto-tuning of the PID controller for nonlinear control systems with fractional order transfer functions. Fractional order control system with parametric uncertainty is also considered for the nonlinear case. On the other hand, a New method is provided for stability margin computation for fractional order nonlinear control system with parametric uncertainty structure using the Nyquist envelopes of the fractional order uncertain plant and the describing function that represents the nonlinearity of the system. Maximum perturbation bounds of the parameters of the fractional order plant are computed. Numerical examples are included to illustrate the methods presented.
Źródło:: Control and Cybernetics; 2015, 44, 2; 233-255
0324-8569
Pojawia się w:: Control and Cybernetics
Dostawca treści:: Biblioteka Nauki

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