Analysis of contact phenomena between a head stack assembly and disk during operational shock

A hard disk drive (HDD) is very sensitive to shock. Increasing portability demands have led to increased HDD exposure to unexpected shocks. Therefore, the dynamic characteristics of an HDD were utilized to investigate the relative behavior of the disk and head stack assembly (HSA) during operational shock. A finite element model of HDD was constructed to simulate operational shock. This model included the spindle system, base, HSA, and disk. The relative behavior of the disk and HSA was analyzed using different bases with different stiffness. A drop test was performed to verify the simulation results. A modified base design was then proposed to protect against contact between the disk and HSA in HDD.

[1]  Fook Fah Yap,et al.  Shock analysis of a head actuator assembly subjected to half-sine acceleration pulses , 2007 .

[2]  Fook Fah Yap,et al.  The pulse width effect of single half-sine acceleration pulse on the peak response of an actuator arm of hard disk drive , 2006 .

[3]  Frank E. Talke,et al.  Experimental and numerical investigation of shock response in 3.5 and 2.5 in. form factor hard disk drives , 2006 .

[4]  David B. Bogy,et al.  Numerical Simulation of Operational-Shock in Small Form Factor Hard Disk Drives , 2007 .

[5]  Quock Ng,et al.  Excitation pulse shape effects in drop test simulation of the actuator arm of a hard disk drive , 2006 .

[6]  Dongwei Shu,et al.  Drop test simulation and power spectrum analysis of a head actuator assembly in a hard disk drive , 2007 .

[7]  Frank E. Talke,et al.  Microdrive operational and non-operational shock and vibration testing , 2007 .

[8]  No-Cheol Park,et al.  Shock and vibration isolation of laptop hard disk drive using rubber mount , 2012 .

[9]  D. B. Bogy,et al.  Parametric Study of Operational Shock in Mobile Disk Drives With Disk–Ramp Contact , 2011, IEEE Transactions on Magnetics.

[10]  Bao-Jun Shi,et al.  The pulse width effect on the shock response of the hard disk drive , 2007 .

[11]  Dongwei Shu,et al.  Shock effects on the performance of the interface between the moving suspension lift-tab and the ramp in a load/unload drive , 2009 .

[12]  Rahul Rai,et al.  Effect of disk support system dynamics on the stability of head–disk interface during an operational shock in a mobile hard disk drive , 2012 .