An Investigation of the Take-Off Behavior of Proximity Recording Sliders Using Acoustic Emission and Phase Demodulated Interferometry

The “take-off” behavior of proximity recording sliders is investigated using acoustic emission and phase demodulated laser interferometry. A biquadratic surface fit of the air bearing surface is used to determine the position of the slider with respect to the disk. Acoustic emission data is examined...

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Bibliographic Details
Published in:Journal of tribology 1999-07, Vol.121 (3), p.581-586
Main Authors: McMillan, T. C, Talke, F. E
Format: Article
Language:English
Subjects:
Applied sciences
Bearings, bushings, rolling bearings
Drives
Electronics
Exact sciences and technology
Magnetic and optical mass memories
Mechanical engineering. Machine design
Storage and reproduction of information
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Summary:The “take-off” behavior of proximity recording sliders is investigated using acoustic emission and phase demodulated laser interferometry. A biquadratic surface fit of the air bearing surface is used to determine the position of the slider with respect to the disk. Acoustic emission data is examined in both the time and frequency domain to analyze the location of slider/disk contacts. Two distinct frequencies are observed in the frequency spectrum of the acoustic emission signal, corresponding to torsional mode and bending mode vibrations of the rigid slider. As the velocity increases, the magnitude of the torsional mode decreases relative to that of the bending mode, indicating that slider/disk contacts change from side rails contacts to trailing edge contacts.
ISSN:0742-4787
1528-8897
DOI:10.1115/1.2834107