High-bandwidth HDD tracking servo by a moving-slider micro-actuator

This paper describes a micro-actuator for high-bandwidth tracking servo, where a micro-actuator is attached between slider and suspension, and moves the slider relative to the suspension. The micro-actuator frequency response measurement proved that this micro-actuator can be modeled as an ideal spr...

Full description

Saved in:
Bibliographic Details
Published in:IEEE transactions on magnetics 1999-09, Vol.35 (5), p.3670-3672
Main Authors: Hirano, T., Long-Sheng Fan, Semba, T., Lee, W.Y., Hong, J., Pattanaik, S., Webb, P., Wen-Han Juan, Chan, S.
Format: Article
Language:English
Subjects:
Actuators
Applied sciences
Bandwidth
Delay
Drivers
Electronics
Exact sciences and technology
Frequency measurement
Frequency response
Magnetic devices
Magnetic heads
Magnetic thin film devices: magnetic heads (magnetoresistive, inductive, etc.)
domain-motion devices, etc
Mathematical models
Microactuators
Resonance
Saturation
Semiconductor electronics. Microelectronics. Optoelectronics. Solid state devices
Servomechanisms
Silicon
Sliders
Step response
Tracking
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:This paper describes a micro-actuator for high-bandwidth tracking servo, where a micro-actuator is attached between slider and suspension, and moves the slider relative to the suspension. The micro-actuator frequency response measurement proved that this micro-actuator can be modeled as an ideal spring-mass-damper system up to 80 kHz, so that very high bandwidth servo system can be easily designed. The maximum servo bandwidth of 6.4 kHz was achieved in a drive level experiment, which is the highest bandwidth ever demonstrated as a drive level. A rapid step response time of 0.2 mS for 0.6 /spl mu/m step was also achieved. The experimental bandwidth was not limited by the micro-actuator's resonance mode, but the saturation of the micro-actuator driver.
ISSN:0018-9464
1941-0069
DOI:10.1109/20.800626