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

fYear

2010

fDate

10-12 Nov. 2010

Firstpage

1

Lastpage

2

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;

fLanguage

English

Publisher

ieee

Conference_Titel

APMRC, 2010 Digest

Conference_Location

Singapore

Print_ISBN

978-1-4244-8103-3

Type

conf

Filename

5682249