Design of Fractional-order PI controller for linear unstable systems

Author

Bhisrkar, Kamlesh K. ; Vyawahare, Vishwesh A. ; Tare, Arti V.

Author_Institution

Dept. of Electr. Eng., Coll. of Eng., Pune, India

fYear

2014

fDate

1-2 March 2014

Firstpage

1

Lastpage

6

Abstract

This paper presents a new strategy for designing of Fractional-order proportional integral (FOPI) controller for a linear unstable systems. The open loop transfer function is compared with the standard fractional-order (FO) transfer function whose closed loop response is always stable and comparison is done in frequency domain i.e. to match magnitude and phase response of the system with the standard FO transfer function. The slope of the Nyquist plot of the standard FO transfer function is also compared with the given open loop system with FOPI controller. The properly tuned FOPI controller´s results are better than its integer order PI and PID counter-part.

Keywords

PI control; closed loop systems; control system synthesis; linear systems; open loop systems; stability; three-term control; transfer functions; FO transfer function; Nyquist plot; P´D counter-part; closed loop response; fractional-order PI controller design; linear unstable systems; open loop system; proportional integral controller; standard fractional-order transfer function; tuned FOPI controller; Delay effects; Equations; Open loop systems; Simulation; Tuning;

fLanguage

English

Publisher

ieee

Conference_Titel

Electrical, Electronics and Computer Science (SCEECS), 2014 IEEE Students' Conference on

Conference_Location

Bhopal

Print_ISBN

978-1-4799-2525-4

Type

conf

DOI

10.1109/SCEECS.2014.6804523

Filename

6804523