Abstract
In order to stabilize the unstable vibration of a flexible disk coupled with a head-suspension system, the effects of damping factors on instabilities due to the dynamic frictional force between head sliders and disk are analyzed using a disk-heads coupling model. From parameter studies, the following results are obtained. First, it is found that the internal and external damping acting on the entire disk make all real parts of natural modes of vibration of the head-disk coupling system shift in the negative direction. Second, the transverse or pitch damping of the head-suspension systems can stabilize an unstable component near the transverse or pitch resonance of the upper and lower head-suspension system, respectively. When the transverse and pitch resonances are close to each other, there are two types of strongly destabilized components in the vicinity of those frequencies. Third, the instabilities due to frictional forces are hardly affected by transverse or pitch contact damping factors.
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