Multivariable H∞ control for an active magnetic bearing flywheel system

Author

Steyn, S.J.M. ; van Vuuren, P.A. ; van Schoor, G.

Author_Institution

Sch. of Electr., Electron. & Comput. Eng., North-West Univ., Potchefstroom, South Africa

fYear

2010

fDate

7-10 Sept. 2010

Firstpage

1

Lastpage

6

Abstract

A state-space model with uncertainties for an active magnetic bearing energy storage flywheel system (Fly-UPS) is developed. A multivariable robust H_∞ controller for the Fly-UPS is then synthesised. Different weighting schemes are explained and used for H_∞ controller synthesis. Furthermore, the additive uncertainties between the nominal simulation model and the physical model at varied rotational speeds are characterised. Stability robustness for additive uncertainties is verified via the gain/phase margin stability robustness criterion. The performance robustness (disturbance attenuation) is analysed by assessing model sensitivity with the ISO/CD 14839-3 sensitivity standard.

Keywords

H^∞ control; ISO standards; control system synthesis; flywheels; machine control; magnetic bearings; multivariable control systems; robust control; stability criteria; state-space methods; uncertain systems; velocity control; H∞ controller synthesis; ISO/CD 14839-3 sensitivity standard; active magnetic bearing energy storage flywheel system; additive uncertainties; disturbance attenuation; fly-UPS; gain-phase margin stability robustness criterion; model sensitivity; multivariable robust H∞ controller; nominal simulation model; performance robustness; rotational speed; state-space model; weighting scheme; H-infinity control; active magnetic bearing; multivariable control; robust control;

fLanguage

English

Publisher

iet

Conference_Titel

Control 2010, UKACC International Conference on

Conference_Location

Coventry

Electronic_ISBN

978-1-84600-038-6

Type

conf

DOI

10.1049/ic.2010.0420

Filename

6490878