Improvement of HDD tracking performance using nonlinear compensation and RPT control

Author

Cheng, Guoyang ; Peng, Kemao ; Chen, Ben M. ; Lee, Tong H.

Author_Institution

Dept. of Electr. & Comput. Eng., Nat. Univ. of Singapore, Singapore

Volume

1

fYear

2004

fDate

20-23 July 2004

Firstpage

84

Abstract

Pivot bearing friction and flex cable nonlinearity are the two major torque nonlinearities which lead to performance degradation in hard disk drive (HDD) servo systems. Based on a comprehensive model of typical voice-coil-motor (VCM) actuator, which explicitly captures the characteristics of pivot bearing friction and flex cable nonlinearity, this paper presents a design of a parameterized controller for HDD servo systems using the robust and perfect tracking (RPT) technique combined with nonlinear torque compensation and integral enhancement. Simulation and experimental results show that the controller can achieve fast settling time and eliminate static errors in HDD track following task.

Keywords

disc drives; friction; hard discs; servomechanisms; flex cable nonlinearity; hard disk drive servo system; nonlinear compensation; nonlinear torque compensation; parameterized controller; pivot bearing friction; robust and perfect tracking technique; torque nonlinearity; voice-coil-motor actuator; Control systems; Degradation; Friction; Hard disks; Linear feedback control systems; Nonlinear control systems; Robust control; Servomechanisms; Target tracking; Torque control;

fLanguage

English

Publisher

ieee

Conference_Titel

Control Conference, 2004. 5th Asian

Conference_Location

Melbourne, Victoria, Australia

Print_ISBN

0-7803-8873-9

Type

conf

Filename

1425940