@misc{Krajewski_Wiesław_Fractional_2014, author={Krajewski, Wiesław and Viaro, Umberto}, copyright={Creative Commons Attribution BY 4.0 license}, address={Warszawa}, journal={Raport Badawczy = Research Report}, howpublished={online}, year={2014}, publisher={Instytut Badań Systemowych. Polska Akademia Nauk}, publisher={Systems Research Institute. Polish Academy of Sciences}, language={eng}, abstract={In this paper, 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 Pl controller. To ensure the desired robustness the parameter regions where such a controller guarantees a given modulus margin 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 or disturbances and unmodelled dynamics.}, title={Fractional order PI controllers for TCP packet flow ensuring given modulus margins}, type={Text}, URL={http://rcin.org.pl/Content/144879/PDF/RB-2014-20.pdf}, keywords={Robust control, Sterowanie odporne, Data transfer, Transfer danych}, }