Abstract
We propose a method for predicting a slider jump boundary, which is key to evaluate op-shock resistance of 2.5" hard disk drives. This method can easily predict a slider jump boundary by using the measured frequency response function (FRF). First, the time history shock responses of a disk and mount-plate are calculated by using the convolution integral with the measured FRFs. Then, the gram-load change is calculated by using a low-degree-of-freedom model with these time history shock responses. Finally, the slider jump boundary is determined when the gram-load, which is the summation of the initial gram-load and gram-load change, becomes 0. This method cannot be used for the contact, but the calculated slider jump boundary of the shock input in a short duration, such as 0.5 ms in which the effect of contact is small, is close to the measured shock resistance.
