Time-Frequency Analysis of Slider Dynamics and the Effect of Lubricant

[+] Author and Article Information
Saurabh K. Deoras, Frank E. Talke

Center for Magnetic Recording Research, Department of Mechanical and Aerospace Engineering, University of California, San Diego, San Diego, California 92093-0401

J. Tribol 126(3), 559-564 (Jun 28, 2004) (6 pages) doi:10.1115/1.1695568 History: Received November 21, 2002; Revised July 11, 2003; Online June 28, 2004
Copyright © 2004 by ASME
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Schematic of experimental setup
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Experimental setup: disk on a spin-stand; laser focused on gimbal
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Slider ABS design and mode shapes
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LDV signal: (a) unprocessed signal, (b) cross correlated and averaged signal
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Power spectrum of velocity signal
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Spectrogram of velocity signal
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Wigner-Ville distribution of velocity signal
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Time-frequency representation of slider-scratch impact: slider body modes
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Displacement signal: various sections
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Defining the system model
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Bode diagram of the model
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Pitch-2 amplitude as a function of disk velocity
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Effect of lubricant on settling time
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Damping coefficients in percent




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