Fractional order QFT controller for nonlinear systems

Author

Meng, Li ; Diao, Fen

Author_Institution

Dept. of Inf. Sci. & Eng., Northeastern Univ., Shenyang, China

fYear

2012

fDate

6-8 July 2012

Firstpage

2136

Lastpage

2141

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; compensation; control system synthesis; flexible structures; nonlinear control systems; nonlinear network analysis; open loop systems; QFT design; flexible controller structure; fractional order QFT controller; fractional-order compensator; high frequency gain; nonlinear RC circuit; nonlinear systems; optimum open loop approximation; quantitative feedback theory; Algorithm design and analysis; Argon; Control systems; Frequency control; Nonlinear systems; Optimization; Poles and zeros; Disturbance Rejection; Fractional order controller; Loop Shaping; Nonlinear System; Quantitative Feedback Theory (QFT);

fLanguage

English

Publisher

ieee

Conference_Titel

Intelligent Control and Automation (WCICA), 2012 10th World Congress on

Conference_Location

Beijing

Print_ISBN

978-1-4673-1397-1

Type

conf

DOI

10.1109/WCICA.2012.6358229

Filename

6358229