Feedback linearization and fuzzy control for conical magnetic bearings

Author

Lin, Lih-Chang ; Gau, Tzyh-Biau

Author_Institution

Dept. of Mech. Eng., Nat. Chung-Hsing Univ., Taichung, Taiwan

Volume

5

Issue

4

fYear

1997

fDate

7/1/1997 12:00:00 AM

Firstpage

417

Lastpage

426

Abstract

Conical magnetic bearings with radial and thrust (axial) control using the input-output feedback linearization method are considered. By suitable selection of nine output variables, the nonlinear magnetic bearing system is transformed to nine linear decoupled subsystems with no internal dynamics using feedback linearization control. Furthermore, a hybrid approach integrating feedback linearization and fuzzy control is proposed for improving the transient performance and robustness of the nonlinear magnetic bearings. Computer simulations are shown to illustrate the effectiveness of the proposed control strategy for simultaneous rotor-shaft speed tracking control and gap deviations regulation

Keywords

closed loop systems; feedback; fuzzy control; large-scale systems; linearisation techniques; machine bearings; magnetic devices; nonlinear control systems; position control; robust control; velocity control; conical magnetic bearings; feedback linearization; fuzzy control; gap deviations regulation; hybrid approach; linear decoupled subsystems; nonlinear magnetic bearing system; radial control; robustness; rotor-shaft speed tracking control; thrust control; transient performance; Control systems; Fuzzy control; Linear feedback control systems; Magnetic levitation; Magnetic variables control; Nonlinear control systems; Nonlinear dynamical systems; Nonlinear magnetics; Output feedback; Robust control;

fLanguage

English

Journal_Title

Control Systems Technology, IEEE Transactions on

Publisher

ieee

ISSN

1063-6536

Type

jour

DOI

10.1109/87.595923

Filename

595923