Flow-induced vibration of head gimbal assembly under various conditions

The flow-induced vibration of a head gimbal assembly (HGA), known as "windage", is a very large obstacle for achieving the higher track densities in hard disk drives (HDDs). We show the natures of windage to develop lower-windage HGAs in this paper. For the slider radius location, when slider is on outer diameter, windage is much larger than other positions. At the high temperature, resonant frequencies decrease and their amplitude increase. For some modes, there is optimized Z-height. These knowledge are useful when we evaluate HGAs and to optimize HGAs with experimental design.