Toward Efficient Op-Shock Simulation

Author

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

Author_Institution

Sch. of Mech. & Aerosp. Eng., Nanyang Technol. Univ.

fYear

2006

fDate

Nov. 29 2006-Dec. 1 2006

Firstpage

1

Lastpage

2

Abstract

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

Keywords

aerodynamics; approximation theory; compressible flow; damping; hard discs; machine bearings; springs (mechanical); state-space methods; structural engineering; HDD; air bearing modelling; approximation; compressible Reynolds equation; hard disk drives; nonlinear spring; op-shock simulation; pitch angle; slider´s flying height; state space formulation; stiffness; structural components; superposition principle; viscous damping; Actuators; Convergence; Damping; Electric shock; Equations; Hard disks; Predictive models; Shape; Space vector pulse width modulation; State-space methods; contact stiffness; operating shock; quasi-static model; state space formulation;

fLanguage

English

Publisher

ieee

Conference_Titel

Asia-Pacific Magnetic Recording Conference, 2006

Conference_Location

Singapore

Print_ISBN

1-4244-0863-6

Type

conf

DOI

10.1109/APMRC.2006.365933

Filename

4215318