A New Finite-Element Based Suspension Model Including Displacement Limiters for Load/Unload Simulations

Abstract

A new beam suspension model for load/unload simulations of magnetic hard disk drive sliders is presented. The model is applicable to the load/unload process as well as to the dynamic flying behavior of the slider on the disk. Suspension and gimbal are modeled with C1 continuous beam elements. The roll degree of freedom of the slider is decoupled from spacing and pitch. The numerical implementation of the model is described. Loading and unloading of a typical subambient pressure type slider is presented.

Modeling of hard disk drives for shock and vibration analysis – consideration of nonlinearities and discontinuities

“…The FE model presented in ref. [33] was adopted to do the numerical simulation. Actual components such as the disks, heads VCM and ramp blocks were used in the experiment.…”

The effect of air shear force moment on the performance of slider air bearings in hard disk drives

“…1, in which the pitch stiffness is k θ . The typical value of the pitch stiffness is 0.067-0.072 mN m/rad [12], 0.086 mN m/rad [13], and 0.16 mN m/rad [11], depending on the design of air bearings. The centre of a pitch spring is assumed to be the position of the dimple in slider air bearings.…”

Simulation of the dynamic characteristics for a hard disk drive during load/unload process subject to an external shock

“…For a hard disk drive in the mobile equipment subjected to the risk of disturbance from external vibration or shock, the overload at the head/disk interface may result in unrecoverable damages to the hard disk. The introduction of Load/Unload technology into the hard disk drives decreases or eliminates the possibility of the impact or shock at the head/disk interface because the suspension lift-tab parking on ramp surface ensures the stability of the slider/read-write head, which is suspending over the disk with a certain height at non-operational state [2][3][4].…”