Reduction of flow-induced suspension vibrations in a hard disk drive by dual-stage suspension control

Author

Teerhuis, Arjan P. ; Cools, Sandra J M ; De Callafon, Raymond A.

Author_Institution

Dept. of Mech. Eng., Eindhoven Univ. of Technol., Netherlands

Volume

39

Issue

5

fYear

2003

Firstpage

2237

Lastpage

2239

Abstract

A control design methodology is proposed to control an active dual-stage suspension for the reduction of flow-induced vibrations (windage) in a hard disk drive. The design of the controller uses dynamical models of both the suspension and the stochastic behavior of the windage to design a low third-order discrete-time feedback controller to reduce windage-induced track misregistration. Experimental results show that nonrepeatable runout errors due to windage are reduced by an order of a magnitude.

Keywords

disc drives; feedback; hard discs; vibration control; vibrations; dual-stage suspension control; dynamical models; flow-induced suspension vibrations reduction; flow-induced vibrations; hard disk drive; low third-order discrete-time feedback controller; stochastic behavior; windage; windage-induced track misregistration; Algorithm design and analysis; Control design; Drives; Error correction; Hard disks; Magnetic separation; Optimal control; Predictive models; Stochastic processes; Vibration control;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/TMAG.2003.815441

Filename

1233035