Abstract

The investigation reported in this paper studies the motion of a typical pico type slider as a function of disk waviness. Laser Doppler vibrometry (LDV) is used to study the motion of a slider on three disks with different waviness. In addition, numerical analysis is applied to determine stiffness and damping of the slider motion as a function of disk waviness. Defining the ratio of slider motion over disk impact motion as the gain of the slider, we find that in the low frequency range the gain of the slider is independent of disk waviness. However, in the high frequency range the gain of the slider is a function of disk waviness.

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