Air-bearing linear actuator for highly precise tracking

Author

Mori, Shigeki ; Hoshino, Takayuki ; Obinata, Goro ; Ouchi, Kazuhiro

Author_Institution

Akita Res. Inst. of Adv. Technol., Japan

Volume

39

Issue

2

fYear

2003

fDate

3/1/2003 12:00:00 AM

Firstpage

812

Lastpage

818

Abstract

An actuator consisting of a linear air bearing and a voice coil motor (VCM) of the linear type was designed for precise tracking. The stiffness of the air bearing was strong enough so that the moving coil of a VCM fixed to the air bearing slider arm could form a cantilever system. The linear actuator showed a much higher resonance frequency than a conventional rotary actuator. Due to the high resonance frequency, the servo bandwidth became significantly wider. The linear actuator could be stepped at 1 nm resolution without overshoots and undershoots and the rise time was less than 0.5 ms.

Keywords

disc drives; electric actuators; hard discs; machine bearings; servomechanisms; tracking; 0.5 ms; VCM; air-bearing linear actuator; cantilever system; hard disk drives; moving coil; overshoots; resonance frequency; rise time; servo bandwidth; slider arm; stiffness; tracking; undershoots; voice coil motor; Acceleration; Bandwidth; Coils; Hydraulic actuators; Magnetic heads; Magnetic recording; Pneumatic actuators; Resonance; Resonant frequency; Servomechanisms;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/TMAG.2003.808930

Filename

1190107