The dynamics of pico sliders is investigated during scratch impact using laser Doppler vibrometry. Air-bearing frequencies and damping of the pitch-2 frequency are studied as a function of disk velocity for lubricant thickness values of 1.6 nm, 1.0 nm and 2.0 nm. Time-frequency analysis is performed to study the instantaneous air-bearing frequencies. System identification methods are used to model the response of the slider after a scratch impact. The results indicate that the slider dynamics and the damping coefficients are affected by the disk velocity and lubricant thickness and also possibly by disk micro-waviness.
Time-Frequency Analysis of Slider Dynamics and the Effect of Lubricant
Contributed by the Tribology Division for publication in the ASME JOURNAL OF TRIBOLOGY. Manuscript received by the Tribology Division November 21, 2002 revised manuscript received July 11, 2003. Associate Editor: C.-P. R. Ku.
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Deoras, S. K., and Talke, F. E. (June 28, 2004). "Time-Frequency Analysis of Slider Dynamics and the Effect of Lubricant ." ASME. J. Tribol. July 2004; 126(3): 559–564. https://doi.org/10.1115/1.1695568
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