Title :
Numerical and Experimental Study on Disk Flutter Reduction Using Disk-Spacer Dampers in Hard Disk Drives
Author :
Koganezawa, Shinji ; Yamamoto, Takayuki ; Tani, Hiroshi ; Tagawa, Norio
Author_Institution :
Dept. of Mech. Eng., Kansai Univ., Suita, Japan
Abstract :
This paper presents a disk-spacer damper (DSD), a new damper structure, for reducing disk flutter. Three types of DSD structures, which consist of an aluminum disk spacer having grooves embedded with viscoelastic (VE) films, have been developed in this paper. First, we investigated the material properties of the VE film, such as shear modulus and discrete relaxation spectra, and then carried out numerical analysis of the damping effect using the material properties. Further, we measured the damping effect of each DSD structure and confirmed that the proposed DSD reduces the disk flutter amplitude between the (0,1) mode and the (0,4) mode by 20%-30%.
Keywords :
damping; disc drives; hard discs; numerical analysis; shock absorbers; thin film devices; vibration control; viscoelasticity; DSD structure; VE film; aluminum disk spacer; discrete relaxation spectra; disk flutter amplitude reduction; disk-spacer damper; hard disk drive; material property; numerical analysis; shear modulus; viscoelastic film; Aluminum; Damping; Finite element analysis; Material properties; Resonant frequency; Shock absorbers; Vibrations; Damping; disk flutter; hard disk drives (HDDs); head positioning accuracy; relaxation spectrum; viscoelastic (VE) material;
Journal_Title :
Magnetics, IEEE Transactions on
DOI :
10.1109/TMAG.2014.2318032
