Abstract
The reliability and stability of hard disk drives (HDDs) is especially important as the areal recording density increasing rapidly target to 10 Tb/in^2 in the future. The vibrations of the Head Gimbals Assembly (HGA) are inevitable by internal fluid flow during operational process. In order to improve this undesirable problem, a piezoelectric transducer (PZT) which can be used to transform an electric current to an acoustic pressure field, is glued onto the inner surface of the HDD cover to generate acoustic pressure to suppress the flow-induced HGA vibration. In this paper, a three-dimensional finite element model of hard disk drive (HDD) is developed with an acoustic PZT actuator. The HGA vibrations in the air and helium-filled drives are investigated by fluid-structure-acoustics interaction approach.
