Toward efficient op-shock simulation

H. Harmoko, F. F. Yap, N. Vahdati, M. Liu, H. Hendri

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review


This paper presents a new method to efficiently predict op-shock performance of hard disk drives (HDD). Structural components of HDD are modeled using state space formulation based on modes superposition principle. The air bearing is modeled as a non-linear spring dependent on slider's flying height and pitch angle; to obtain the air bearing stiffness the compressible Reynolds equation is evaluated in quasi-steady state and the squeeze term is approximated using viscous damping. Experimental results show that the method is reasonably accurate. The time needed for one 10-ms simulation run is only several minutes. Using this method some new design parameters, such as material proportional damping, are studied.

Original languageBritish English
Title of host publicationAsia-Pacific Magnetic Recording Conference 2006, Digest of APMRC 2006
StatePublished - 2006
EventAsia-Pacific Magnetic Recording Conference 2006, APMRC 2006 - , Singapore
Duration: 29 Nov 20061 Dec 2006

Publication series

NameAsia-Pacific Magnetic Recording Conference 2006, Digest of APMRC 2006


ConferenceAsia-Pacific Magnetic Recording Conference 2006, APMRC 2006


  • Contact stiffness
  • Operating shock
  • Quasi-static model
  • State space formulation


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