DocumentCode :
793257
Title :
Drive level slider-suspension vibration analysis and its application to a ramp-load magnetic disk drive
Author :
Fu, Ta Chang ; Bogy, David B.
Author_Institution :
Dept. of Mech. Eng., California Univ., Berkeley, CA, USA
Volume :
31
Issue :
6
fYear :
1995
fDate :
11/1/1995 12:00:00 AM
Firstpage :
3003
Lastpage :
3005
Abstract :
An experimental method employing a piezoelectric transducer and a dual channel laser Doppler vibrometer (LDV) is presented, that is capable of vibration analysis of the slider-suspension assembly in a production disk drive with minor modification. We then apply this method to a ramp-load disk drive to investigate the radial acceleration effect on slider dynamics at the beginning of radial loading motion while the suspension arm moves along the ramp structure. The results show that the slider´s motion in the roll and vertical directions are strongly coupled by the radial vibration of the suspension, and that the radial acceleration at the beginning of the radial loading motion has only negligible effect on the parameters determining slider-disk contact. These parameters are the pitch, roll and loading velocities of the slider at the establishment of the air bearing, and they can be measured by the LDV during the ramp loading process by fixing the actuator and actuating the disk drive
Keywords :
Doppler measurement; hard discs; measurement by laser beam; piezoelectric transducers; vibration measurement; vibrations; dual channel laser Doppler vibrometer; loading velocities; piezoelectric transducer; pitch; radial acceleration effect; radial loading motion; ramp-load magnetic disk drive; rigid disk drives; roll; slider dynamics; slider-disk contact; slider-suspension vibration analysis; Acceleration; Disk drives; Laser beams; Magnetic analysis; Motion measurement; Pneumatic actuators; Position measurement; Steel; Transducers; Vibrations;
fLanguage :
English
Journal_Title :
Magnetics, IEEE Transactions on
Publisher :
ieee
ISSN :
0018-9464
Type :
jour
DOI :
10.1109/20.490251
Filename :
490251
Link To Document :
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