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TECHNICAL PAPERS

Slider Vibration Analysis at Contact Using Time-Frequency Analysis and Wavelet Transforms

[+] Author and Article Information
Bernhard Knigge, Frank E. Talke

Center for Magnetic Recording Research, UCSD, La Jolla, California 92093-0401

J. Tribol 123(3), 548-554 (Jul 06, 2000) (7 pages) doi:10.1115/1.1308035 History: Received February 21, 2000; Revised July 06, 2000
Copyright © 2001 by ASME
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References

Figures

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(a) Pro-E model of nano glide slider. The PZT crystal is mounted on the “wing” of the slider; (b) Pro-E model of pico glide slider.
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Suspension with PZT crystal mounted near head/gimble point
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Finite element modal analysis of nano glide slider
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(a)–(d) Finite element modal analysis of pico glide slider
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(a) Reassigned Gabor presentation of a disk impact at 30 m/s disk velocity, nano glide slider; (b) Reassigned Gabor presentation of a disk impact at 10 m/s disk velocity, nano glide slider; (c) Reassigned Gabor presentation of a disk impact at 5 m/s disk velocity nano glide slider
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Wavelet transforms of nano glide impact at 5 m/s disk velocity
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Wavelet transforms of band-pass filtered signal of nano glide slider impact at 5 m/s disk velocity
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(a) Zhao Atlas Marks distribution of bump impact at 5 m/s, sampled at 1 MHz; (b) Gabor presentation of the signal from Fig. 8a plotted in 3D
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(a) Wavelet transformation for a pico glide slider colliding with a laser bump at 10 m/s disk velocity. The trigger is delayed by 200 μs; (b) Gabor spectrogram for a pico glide slider colliding with a laser bump at 20 m/s disk velocity.
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(a) AE signal of subambient pressure tripad slider colliding with a laser bump at 29 m/s. Re-assigned Gabor presentation; (b) AE signal of subambient pressure tripad slider colliding with a laser bump at 17 m/s. Re-assigned Gabor presentation.
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PZT signal of subambient pressure slider colliding with a laser bump at 29 m/s disk velocity. Gabor presentation.

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