Optimal control design for hard disk drive servosystems

Author

Guo, G. ; Chen, R. ; Low, T.S. ; Wang, Y.

Author_Institution

Data Storage Inst., Singapore, Singapore

Volume

149

Issue

3

fYear

2002

fDate

5/1/2002 12:00:00 AM

Firstpage

237

Lastpage

242

Abstract

The authors present an optimal robust controller design for hard disk drive (HDD) actuator servosystems using direct parameter optimisation taking into account stability restrictions. First, the HDD actuator model is augmented with a state observer. A bound of the stable feedback gain is then calculated by solving a Riccati equation considering the plant parameter uncertainties. To improve the system transient and steady-state performance, the control parameters are selected inside the feedback gain bound using the random neighbourhood search method. Both simulation and implementation results show that an improved digital controller can be obtained for the uncertain HDD plant

Keywords

Riccati equations; actuators; control system synthesis; digital control; disc drives; feedback; hard discs; observers; optimal control; robust control; servomechanisms; stability criteria; uncertain systems; HDD actuator servosystems; Riccati equation; digital controller; feedback gain bound; hard disk drive servosystems; optimal robust controller design; plant parameter uncertainties; stability restrictions; stable feedback gain bound; state observer; steady-state performance; transient performance; uncertain HDD plant;

fLanguage

English

Journal_Title

Control Theory and Applications, IEE Proceedings -

Publisher

iet

ISSN

1350-2379

Type

jour

DOI

10.1049/ip-cta:20020233

Filename

1013324