Fractional order PI controllers for TCP packet flow ensuring given modulus margins

• Autorzy: Krajewski W. , Viaro U.
• Języki publikacji: EN

Abstrakty

EN

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.

Słowa kluczowe

EN

fractional-order PI controllers; robust control; TCP congestion control; delayed systems

• Wydawca: Systems Research Institute, Polish Academy of Sciences
• Czasopismo: Control and Cybernetics
• Rocznik: 2014
• Tom: Vol. 43, no. 4
• Strony: 493--505
• Opis fizyczny: Bibliogr. 25 poz.

Twórcy

autor

Krajewski W.

• Systems Research Institute, Polish Academy of Sciences, ul. Newelska 6, 01–447 Warsaw, Poland

autor

Viaro U.

• Department of Electrical Management and Mechanical Engineering, University of Udine, via delle Scienze 206, 33100 Udine, Italy

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