DocumentCode
1447156
Title
PZT crack detection in suspension-based dual stage actuator [for HDDs]
Author
Yeh, Yung-Ping ; McCaslin, Marty ; Ku, C. P Roger
Author_Institution
Dept. of Mech. Eng., California Univ., San Diego, La Jolla, CA, USA
Volume
36
Issue
5
fYear
2000
fDate
9/1/2000 12:00:00 AM
Firstpage
2244
Lastpage
2246
Abstract
An impedance method is proposed to detect cracks of PZT bars in suspension based dual stage-actuators. The frequency response amplitude of impedance at the resonance of 1.95 MHz, the PZT bar width extension mode, was very sensitive to the cracks in PZT material. As cracks in the PZT bars propagated from invisible micro cracks to visible macro cracks, the impedance gain at 1.95 MHz dropped suddenly
Keywords
crack detection; disc drives; frequency response; hard discs; lead compounds; microactuators; piezoelectric actuators; 1.95 MHz; PZT; PbZrO3TiO3; bar width extension mode; crack detection; frequency response amplitude; impedance method; invisible micro cracks; microactuators; suspension-based dual stage actuator; visible macro cracks; Actuators; Assembly; Bandwidth; Bars; Circuit synthesis; Circuit testing; Frequency; Impedance; Microactuators; Servomechanisms;
fLanguage
English
Journal_Title
Magnetics, IEEE Transactions on
Publisher
ieee
ISSN
0018-9464
Type
jour
DOI
10.1109/20.908379
Filename
908379
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