Adaptive compensation of microactuator resonance in hard disk drives

Author

Wu, Daowei ; Guo, Guoxiao ; Chong, T.C.

Author_Institution

Data Storage Inst., Singapore

Volume

36

Issue

5

fYear

2000

fDate

9/1/2000 12:00:00 AM

Firstpage

2247

Lastpage

2250

Abstract

This article presents an adaptive resonance compensation scheme for microactuator-based dual-stage servo system in hard disk drives. The approach is to identify the microactuator resonant modes and compensate the model accordingly to a simpler one by pole-zero cancellation. Consequently, the servo controller can be designed based on the compensated fixed model despite actuator resonant mode variations. Simulation and experiment results show that this adaptive compensation scheme can suppress microactuator resonance without priori knowledge of the resonant modes. This approach makes the servo control system robust against microactuator resonance variations

Keywords

adaptive control; compensation; disc drives; hard discs; microactuators; poles and zeros; robust control; servomechanisms; adaptive compensation scheme; compensated fixed model; dual-stage servo system; hard disk drives; microactuator resonance; pole-zero cancellation; resonant mode variations; resonant modes; robustness; servo control system; Bandwidth; Electrical equipment industry; Hard disks; Memory; Microactuators; Polynomials; Resonance; Robust control; Servomechanisms; Transfer functions;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.908380

Filename

908380