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RESEARCH PAPERS

Experimental Evaluation of Stiffness and Damping of Slider-Air Bearings in Hard Disk Drives

[+] Author and Article Information
Q. H. Zeng, D. B. Bogy

Computer Mechanics Laboratory, Department of Mechanical Engineering, University of California, Berkeley, CA 94720

J. Tribol 121(1), 102-107 (Jan 01, 1999) (6 pages) doi:10.1115/1.2833788 History: Received November 20, 1997; Revised June 20, 1998; Online January 24, 2008

Abstract

The system identification method was applied to experimentally investigate the dynamic characteristics of slider-air bearings in hard disk drives. The transient responses of sliders were measured, and the modal frequencies and damping ratios that are directly related to the stiffness and damping of the bearings were obtained by data processing and parameter identification. The dynamic property of a particular advanced air bearing (AAB) slider was measured and compared with simulation results. It was found that, contrary to usual perception, the suspension assembly significantly affects the dynamic characteristics of the air bearings. Contacts between the load beam and the flexure may introduce a larger damping and nonlinear property. The preliminary results also show that the proposed method is robust for experimentally evaluating the dynamic properties of slider-air bearings.

Copyright © 1999 by The American Society of Mechanical Engineers
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