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suspension dynamics of HDD for high track density

고트랙밀도 HDD 서스펜션의 동특성 해석

  • 김정주 (건국대학교 대학원 기계공학과) ;
  • 전정일 (건국대학교 대학원 기계공학과) ;
  • 변용규 (삼성종합기술원 정밀기계연구실) ;
  • 노광춘 (삼성종합기술원 정밀기계연구실) ;
  • 정정주 (한양대학교 전기전자공학부) ;
  • 전태건 (건국대학교 기계공학과)
  • Published : 1997.11.01

Abstract

As track density needs to increase to the order of 10, 000 tpi, the suspension has become a critical component in hard disk drives. One of the main obstacles to attain high track density is the structural resonances of the suspension in lateral direction. We investigate the suspension dynamics through the experimental modal analysis and the finite element method. An LDV (Laser Doppler Vibrometer) is employed to measure the response of the suspension which is excited by a shaker and an inpulse hammer for the free condition and the loaded condition, respectively. After comparing the experimental and numerical results, we study how the initial geometry of the bend region affects the suspension dynamics. It is found that the natural frequency of the sway mode decreases as the bend ratio and the bend angle increase. The shape of torsional mode changes as the mass of a slider increases, resulting in a local decrease in the natural frequency.

Keywords

Hard Disk Drive;Head-Gimbal Assembly;Suspension;Modal Testing;Sway Mode