Design of fractional order QFT controller for nonlinear systems

Author

Meng, Li ; Diao, Fen

Author_Institution

Dept. of Inf. Eng., Shenyang Univ., Shenyang, China

fYear

2012

fDate

25-27 July 2012

Firstpage

933

Lastpage

938

Abstract

This paper presents the design of a robust fractional order controller for the nonlinear RC circuit based on quantitative feedback theory (QFT). In this work, a fractional-order compensator, with a flexible controller structure, is introduced into the QFT design to give a better approximation of optimum open loop in Nichols. It has been demonstrated that the fractional order controller can provide smaller high frequency gain than the integer order controller due to its extra tunable parameters.

Keywords

RC circuits; approximation theory; control system synthesis; feedback; nonlinear control systems; robust control; Nichols; flexible controller structure; fractional order QFT controller design; fractional-order compensator; nonlinear RC circuit; nonlinear system; optimum open loop approximation; quantitative feedback theory; robust fractional order controller design; Control systems; Frequency control; Nonlinear systems; Optimization; Poles and zeros; Stability criteria; Disturbance Rejection; Fractional order controller; Loop Shaping; Nonlinear System; Quantitative Feedback Theory (QFT);

fLanguage

English

Publisher

ieee

Conference_Titel

Control Conference (CCC), 2012 31st Chinese

Conference_Location

Hefei

ISSN

1934-1768

Print_ISBN

978-1-4673-2581-3

Type

conf

Filename

6390058