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Theoretical Study of Self-Excited and Forced Vibrations of Flying Head Slider in Near-Contact Region

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2 Author(s)
Ono, K. ; Hitachi Ltd., Kanagawa ; Yamane, M.

After introducing our previous study of bouncing instability of a flying head slider, we numerically investigated slider dynamics in the near-contact region taking the root-mean-square value and frequency roll-off factor of the micro-waviness as parameters by using 2-degrees-of-freedom slider model, random micro-waviness model and lubricated rough-surface-contact characteristics model. We found that the slider exhibits self-excited bouncing vibration with a frequency close to the lower pitch frequency under small microwaviness but tends to exhibit forced vibration with a resonant frequency in the upper pitch mode as the amplitude of microwaviness increases. If the amount of microwaviness and destabilized sources are reduced sufficiently, there is a contact sliding condition without self-excited and forced bouncing vibration.

Published in:

Magnetics, IEEE Transactions on  (Volume:43 ,  Issue: 9 )

Date of Publication:

Sept. 2007

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