Experiments in fuzzy logic based control of a magnetic bearing system

Author

Sung-Kyung Hong ; Langari, R. ; May, Doug

Author_Institution

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

fYear

1997

fDate

21-24 Sep 1997

Firstpage

90

Lastpage

95

Abstract

The paper deals with the control of a levitated object with position dependent nonlinearity. The authors applied fuzzy modeling and control to a nonlinear magnetic bearing system to obtain uniform desired performance over the entire clearance. They represented the nonlinear magnetic bearing by the Takagi-Sugeno-Kang (TSK) fuzzy model, in which the nonlinear global model is approximated by a set of linear local models. Then a model-based fuzzy controller, the so-called parallel distributed compensation (PDC), is employed. Experimental results demonstrate that the controller provides excellent compensation for unstable/nonlinear characteristics of the magnetic bearing system and maximizes the controller´s valid region of operation, while guaranteeing pre-specified transient performance

Keywords

compensation; fuzzy control; fuzzy logic; machine bearings; magnetic levitation; nonlinear control systems; stability; Takagi-Sugeno-Kang fuzzy model; clearance; fuzzy logic based control; fuzzy modeling; guaranteed pre-specified transient performance; levitated object control; linear local models; maximized valid operation region; model-based fuzzy controller; nonlinear characteristics compensation; nonlinear global model; nonlinear magnetic bearing system; parallel distributed compensation; position dependent nonlinearity; uniform desired performance; unstable characteristics compensation; Control systems; Force control; Fuzzy control; Fuzzy logic; Intelligent robots; Magnetic forces; Magnetic levitation; Nonlinear control systems; Open loop systems; Sliding mode control;

fLanguage

English

Publisher

ieee

Conference_Titel

Fuzzy Information Processing Society, 1997. NAFIPS '97., 1997 Annual Meeting of the North American

Conference_Location

Syracuse, NY

Print_ISBN

0-7803-4078-7

Type

conf

DOI

10.1109/NAFIPS.1997.624017

Filename

624017