Air-bearing linear actuator for highly precise tracking

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 actuato...

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Bibliographic Details
Published in:IEEE transactions on magnetics 2003-03, Vol.39 (2), p.812-818
Main Authors: Mori, S., Hoshino, T., Obinata, G., Ouchi, K.
Format: Article
Language:English
Subjects:
Acceleration
Actuators
Air bearings
Applied sciences
Bandwidth
Coiling
Coils
Electronics
Exact sciences and technology
Gas bearings
Hydraulic actuators
Magnetic and optical mass memories
Magnetic heads
Magnetic recording
Magnetism
Motors
Moving coil
Other magnetic recording and storage devices (including tapes, disks, and drums)
Pneumatic actuators
Resonance
Resonant frequency
Servomechanisms
Sliders
Storage and reproduction of information
Tracking
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Description
Summary: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.
ISSN:0018-9464
1941-0069
DOI:10.1109/TMAG.2003.808930