Wyniki wyszukiwania - BazTech

1

Analiza D-stabilności protokołu TCP-DCR

Klamka J., Tańcula J.

Studia Informatica

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2012

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Vol. 33, nr 3A

7-18

PL

Praca zawiera analizę stabilności sieci na podstawie protokołu TCPDCR, będącego modyfikacją tradycyjnego TCP. Utworzono model matematyczny sieci i opisano go równaniami. Schemat blokowy modelu sieci przekształcono do takiej postaci, aby zbadać jego D-stabilnośe stosując metodę przestrzeni niepewnych parametrów.

EN

The paper contains an analysis of the stability of the netwofk based on TCP-DCR, which is a modification of the traditional TCP. Created inatheoiatical model of the network and it is described by equatioas. Błock diagram of the nerwork niodel was converted to a form in order to investigałe the D-stability using tlie niethod of the space of imcertain parameters.

2

Obszary D-stabilności układów regulacji z obiektami całkującymi z opóźnieniem i regulatorem PD

Ruszewski A.

Pomiary Automatyka Robotyka

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2008

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R. 12, nr 2

503--512

PL

W pracy rozpatrzono problem D-stabilności układów regulacji automatycznej z regulatorem typu PD i obiektami całkującymi z opóźnieniem. Podano komputerowe metody wyznaczania obszarów D-stabilności na płaszczyźnie parametrów obiektu i regulatora. Znajomość tych obszarów pozwala na proste obliczenie nastaw regulatora, przy zapewnieniu określonego współczynnika tłumienia i stopnia stabilności w układzie regulacji. Proponowane metody bazują na klasycznej metodzie podziału D.

EN

The paper presents the D-stability problem of control systems with integrator plants with time delay and the PD controller. Simple methods for determining D-stability regions in the plant and the controller parameters space are given. Knowledge of these regions permits tuning of the PD controller and ensures required damping ratio and level of stability of the system. The methods proposed are based on the D-partition method.

3

Robust performance of a class of control systems

Wang L.

Control and Cybernetics

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2004

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Vol. 33, no 1

71-83

EN

Some Kharitonov-like robust Hurwitz stability criteria are established for a class of complex polynomial families with nonlinearly correlated perturbations. These results are extended to the polynomial matrix case and non-interval D-stability case. Applications of these results in testing of robust strict positive realness of real and complex interval transfer function families are also presented.

4

The order reduction and robust D-stability analysis of discrete uncertain time-delay systems by time-scale separation

Pan S.-T.

Control and Cybernetics

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2003

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Vol. 32, no 4

745-760

EN

In this paper, the robust D-stability problem for discrete uncertain multiple time-delay systems is examined on the basis of their such reduced-order models (the slow and fast subsystems), which are obtained by time-scale separation method. Under the condition that the slow and fast subsystems of the nominal system are both -D(a,r)-stable, a D-stability criterion for the slow and fast subsystem of the original uncertain system is first derived. A delay-dependent criterion in terms of spectral radius is then proposed to guarantee the robust D-stability of the original uncertain system subject to structured perturbations. Moreover, the criterion for the robust asymptotic stability of the system subject to structured perturbations can be obtained from the proposed robust D-stability criterion. A numerical example is provided to illustrate our main results.

5

D-stability for a class of discrete descriptor systems with multiple time delays

Pan S., Chen C., Hsieh J.

Control and Cybernetics

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2002

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Vol. 31, no 1

79-89

EN

In this paper, the research on discrete descriptor systems is extended to include discrete multiple time-delay descriptor systems. The impulse-free and D-stability problem for a class of discrete descriptor systems with multiple time delays is investigated. A delay-dependent criterion is first derived to guarantee that the system is proper. A delay-dependent stability criterion in terms of spectral radius is then presented to ensure the D-stability of the system. Furthermore, a delay-dependent criterion is proposed to guarantee that the system is nebular, impulse-free, and D-stable. Finally, a numerical example is provided to illustrate our main results.