Title :
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
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;
Conference_Titel :
Control 2010, UKACC International Conference on
Conference_Location :
Coventry
Electronic_ISBN :
978-1-84600-038-6
DOI :
10.1049/ic.2010.0420
