DocumentCode
881186
Title
Microactuator control for disk drive
Author
Takaishi, K. ; Imamura, T. ; Mizoshita, Y. ; Hasegawa, S. ; Ueno, T. ; Yamada, T.
Author_Institution
File Memory Lab., Fujitsu Labs. Ltd., Atsugi, Japan
Volume
32
Issue
3
fYear
1996
fDate
5/1/1996 12:00:00 AM
Firstpage
1863
Lastpage
1866
Abstract
The nonlinear response of a conventional actuator which depends on the ball-bearing friction is the main factor for determining the high track density of hard disk drives. We cannot get enough servo loop gain in the low-frequency region with a conventional single actuator because of its hysteresis characteristics. We have developed a new planar piezoelectric microactuator which is lightweight and applicable for a hard disk drive. Also we introduced a two-stage servo controller and realized a high servo bandwidth over 1 kHz and enough tracking-error reduction in the low-frequency region
Keywords
hard discs; microactuators; piezoelectric actuators; servomechanisms; 1 kHz; ball-bearing friction; control; hard disk drive; hysteresis; loop gain; nonlinear response; planar piezoelectric microactuator; track density; tracking error; two-stage servo controller; Actuators; Bandwidth; Disk drives; Friction; Hard disks; Hysteresis; Microactuators; Resonant frequency; Servomechanisms; Transfer functions;
fLanguage
English
Journal_Title
Magnetics, IEEE Transactions on
Publisher
ieee
ISSN
0018-9464
Type
jour
DOI
10.1109/20.492878
Filename
492878
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