Title :
Numerical simulation of positioning error caused by air-flow-induced vibration of head gimbals assembly in hard disk drive
Author :
Shimizu, Hayato ; Shimizu, Toshihiko ; Tokuyama, Mikio ; Masuda, Hiromitu ; Nakamura, Shigeo
Author_Institution :
Mech. Eng. Res. Lab., Hitachi Ltd., Ibaraki, Japan
Abstract :
Unsteady airflow in an actual hard disk drive (HDD) which has a rotary actuator is numerically simulated by using LES (large eddy simulation) technique, and the aerodynamic force affecting head gimbals assembly (HGA) is estimated from the simulation. Then calculated force is fed to a structure analysis to predict the airflow-induced vibration of HGA. Lastly, we calculate the head positioning error or the head displacements for the different HGA orientations to explain and classify the mechanism of airflow-induced positioning error (i.e. windage) in HDD.
Keywords :
aerodynamics; computational fluid dynamics; disc drives; hard discs; magnetic heads; turbulence; vibrations; HGA orientations; LES; aerodynamic force; air-flow-induced vibration; hard disk drive; head displacements; head gimbals assembly; large eddy simulation; positioning error; rotary actuator; structure analysis; unsteady airflow; windage; Aerodynamics; Assembly; Fluctuations; Hard disks; Magnetic heads; Numerical simulation; Pneumatic actuators; Predictive models; Testing; Vibrations;
Conference_Titel :
Magnetic Recording Conference, 2002. Digest of the Asia-Pacific
Conference_Location :
Singapore
Print_ISBN :
0-7803-7509-2
DOI :
10.1109/APMRC.2002.1037627
