Limitation of linear controllers for the precision magnetic bearing with uncertainties

Author

Kubota, T. ; Youcef-Toumi, K.

Author_Institution

Dept. of Mech. Eng., MIT, Cambridge, MA, USA

Volume

4

fYear

1998

fDate

21-26 Jun 1998

Firstpage

2224

Abstract

In order to investigate the achievable performance robustness of the control system for magnetic bearings used for precise positioning, the μ-synthesis is applied to an existing system. With structured singular value plots, the limitation of linear controllers for the magnetic bearing with unknown rotor mass is evaluated. The increase in controller gain when the system is close to its performance limit is revealed. The achievable robustness with bandwidth limit is also evaluated to achieve stability robustness for the system with high-frequency unmodeled dynamics

Keywords

H^∞ control; control system synthesis; dynamics; linear systems; magnetic levitation; position control; robust control; rotors; H_∞ control; control synthesis; dynamics; linear controllers; magnetic bearing; position control; robust control; robustness; rotor; stability; Bandwidth; Control systems; Magnetic analysis; Magnetic forces; Magnetic levitation; Robust control; Robust stability; Robustness; Sliding mode control; Uncertainty;

fLanguage

English

Publisher

ieee

Conference_Titel

American Control Conference, 1998. Proceedings of the 1998

Conference_Location

Philadelphia, PA

ISSN

0743-1619

Print_ISBN

0-7803-4530-4

Type

conf

DOI

10.1109/ACC.1998.703022

Filename

703022