Acceleration feedforward control against rotational disturbance in hard disk drives

Author

Jinzenji, Akihide ; Sasamoto, Tatsuro ; Aikawa, Koichi ; Yoshida, Susumu ; Aruga, Keiji

Author_Institution

HDD Div., Fujitsu Labs. Ltd., Kawasaki, Japan

Volume

37

Issue

2

fYear

2001

fDate

3/1/2001 12:00:00 AM

Firstpage

888

Lastpage

893

Abstract

We have developed an acceleration feedforward control fur hard disk drives by using dual piezoelectric accelerometers. The dual accelerometers detect angular acceleration in the hard disk drive (HDD) and compensate for its negative effects. For optimum compensation we introduced the use of a phase compensation filter (PCF). Using this controller, the rejection capability against rotational disturbance is improved and HDD performance does not decrease even under the severest conditions: for example, in a disk array system that has the severest mechanical interaction between HDDs

Keywords

acceleration control; accelerometers; compensation; disc drives; feedforward; hard discs; piezoelectric transducers; position control; acceleration feedforward control; angular acceleration; disk array system; dual piezoelectric accelerometers; hard disk drives; mechanical interaction; optimum compensation; phase compensation filter; rejection capability; rotational disturbance; Acceleration; Accelerometers; Automatic frequency control; Bandwidth; Error correction; Hard disks; Phased arrays; Resonance; Servomechanisms; Vibrations;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.917637

Filename

917637