Title :
High frequency radial mode vibration in hard disk drives
Author :
Ku, C.-P.R. ; Juang, J.-Y. ; Sun, X. ; Huang, L. ; Huang, F.-Y.
Author_Institution :
Hitachi Global Storage Technol., San Jose, CA, USA
Abstract :
In this digest, a 3.5 inch computer hard disk drive consisting of a rotating shaft fluid dynamic bearing spindle motor under external linear vibration is analyzed by a commercial finite element analysis software. Predicted transfer functions of the off-track motion per unit input force are compared to measured drive position-error signals on a shaker table. Both analysis and experimental results show a huge disk pack radial motion due to the bending of the bearing shaft and motor bracket, under linear vibration. The characteristics of the high frequency radial mode will be discussed with the effects of key parameters in the full paper.
Keywords :
bending; disc drives; finite element analysis; fluid dynamics; hard discs; machine bearings; machine tool spindles; shafts; vibrations; bearing shaft; bearing spindle motor; bending; disk pack radial motion; drive position-error signal; finite element analysis; hard disk drive; high frequency radial mode vibration; linear vibration; motor bracket; off-track motion; rotating shaft fluid dynamic; transfer function; Finite element methods; fluid dynamic bearings; hard disk drives; spindle motors; vibration;
Conference_Titel :
APMRC, 2010 Digest
Conference_Location :
Singapore
Print_ISBN :
978-1-4244-8103-3
