Adaptive-Q control of vibration due to unknown disturbances in rotor/magnetic bearing systems

Author

Cole, M.O.T. ; Keogh, P.S. ; Burrows, C.R.

Author_Institution

Dept. of Mech. Eng., Bath Univ., UK

fYear

2000

fDate

2000

Firstpage

965

Lastpage

970

Abstract

A method of adaptive control, termed adaptive-Q control, is applied to a rotor/magnetic bearing system. The method is based on the principle that a model based stabilising controller can be formed from a fixed state feedback controller together with a free parameter Q, which is any stable transfer function matrix. The problem of adapting Q online to minimise the sum squares vibration error is formulated and implemented in simulation using a recursive least squares algorithm. The results of the simulation study show that the method of control can be successfully applied to minimise the rotor vibration due to unknown disturbances. This is demonstrated for direct rotor forcing and base motion disturbances

Keywords

adaptive control; least squares approximations; machine control; magnetic bearings; rotors; stability; state feedback; transfer function matrices; uncertain systems; vibration control; adaptive-Q control; base motion disturbances; direct rotor forcing; fixed state feedback controller; free parameter; magnetic bearing systems; model based stabilising controller; recursive least squares algorithm; rotor systems; rotor vibration minimisation; stable transfer function matrix; sum squares vibration error; unknown disturbances; vibration control; Adaptive control; Control systems; Force control; Force measurement; Magnetic levitation; Motion control; Programmable control; Transfer functions; Vibration control; Vibration measurement;

fLanguage

English

Publisher

ieee

Conference_Titel

Control Applications, 2000. Proceedings of the 2000 IEEE International Conference on

Conference_Location

Anchorage, AK

Print_ISBN

0-7803-6562-3

Type

conf

DOI

10.1109/CCA.2000.897596

Filename

897596