A QFT design methodology for feedback systems under input saturation

Author

Wu, Wei ; Jayasuriya, Suhada

Author_Institution

Dept. of Mech. Eng., Texas A&M Univ., College Station, TX, USA

Volume

2

fYear

2000

fDate

2000

Firstpage

1250

Abstract

Presents a design methodology for robust stability and robust performance for a large class of plants subject to an input saturation nonlinearity. Based on Horowitz´s 3-DOF linear design method (1983), a more general form for the additional loop transmission around the saturating element is proposed to design the 3rd DOF H(s), for Type n stable plants, n⩾1. Robust stability is established with the circle criterion and the describing function technique, and robust performance is improved by imposing non-overshooting conditions. All stability and performance requirements are then transformed into frequency domain design bounds which are easily obtained using QFT design techniques

Keywords

closed loop systems; control nonlinearities; control system synthesis; describing functions; feedback; frequency-domain synthesis; robust control; stability criteria; transfer functions; 3-DOF linear design method; QFT design methodology; Type n stable plants; circle criterion; describing function technique; feedback systems; frequency domain design bounds; input saturation nonlinearity; nonovershooting conditions; quantitative feedback theory; robust performance; robust stability; Control systems; Degradation; Design methodology; Feedback; Frequency domain analysis; Limit-cycles; Mechanical engineering; Robust stability; Transfer functions; Uncertainty;

fLanguage

English

Publisher

ieee

Conference_Titel

American Control Conference, 2000. Proceedings of the 2000

Conference_Location

Chicago, IL

ISSN

0743-1619

Print_ISBN

0-7803-5519-9

Type

conf

DOI

10.1109/ACC.2000.876700

Filename

876700