Analysis and comparison of resonance compensation in dual-stage actuation system of HDDs

Author

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

Author_Institution

Nat. Univ. of Singapore, Singapore

Volume

5

fYear

2001

fDate

2001

Firstpage

3824

Abstract

Dual-stage actuation system will be adopted in hard disk drives (HDDs) to meet the demand for higher radial recording density in the near future. The resonance of milli/micro-actuator in the dual-stage actuation system limits the improvement of the servo bandwidth. In this paper, three approaches of resonance compensation for dual-stage actuation system in HDDs, namely notch filtering, indirect adaptive compensation and structurally parallel compensation, are compared for the goal of extending the servo bandwidth. The characteristics and tradeoffs of each method is analyzed and compared in the same baseline control structure. It is shown that appropriate resonance compensation methods can increase the servo bandwidth considerably, and thus could increase the tracking accuracy with least changing to the servo controller in HDDs

Keywords

compensation; disc drives; hard discs; notch filters; resonance; servomechanisms; dual-stage actuation system; hard disk drives; indirect adaptive compensation; notch filtering; parallel compensation; resonance compensation; servo bandwidth; servo controller; tracking; Actuators; Bandwidth; Bit rate; Control systems; Disk recording; Filtering; Hard disks; Noise measurement; Resonance; Servomechanisms;

fLanguage

English

Publisher

ieee

Conference_Titel

American Control Conference, 2001. Proceedings of the 2001

Conference_Location

Arlington, VA

ISSN

0743-1619

Print_ISBN

0-7803-6495-3

Type

conf

DOI

10.1109/ACC.2001.946236

Filename

946236