Finite Element Analysis of a Computer Hard Disk Drive Under Shock

Lin, Chen-Chi

doi:10.1115/1.1424299

Cited by 19 publications

(5 citation statements)

References 7 publications

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“…Lee et al (2001) developed a single-degree-of-freedom (SDOF) model for predicting the shock behavior of the suspension. Lin (2002) studied the effects of various mechanical parameters on shock resistance by simulating the non-operational shock response of a drive, and the results revealed that increasing the actuator and base plate stiffnesses improved the shock performance. In the research of Gao et al (2005), a flexible multibody dynamics formulation was developed to analyze the vibration of the voice coil motor (VCM-actuator) assembly and the disk-spindle assembly.…”

Section: Introductionmentioning

confidence: 98%

Shock effects on the performance of the interface between the moving suspension lift-tab and the ramp in a load/unload drive

Shao

et al. 2009

Microsyst Technol

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The bouncing behavior of the suspension lifttab at the tab-ramp interface during the unloading process of a hard disk drive subject to external shocks was studied by using a lumped-parameter dynamic model with one degree of freedom in a moving reference frame. A finite element model of the hard disk drive was used to generate the data as input to the lumped-parameter model. This simulation scheme allows easy examination of the effects of individual contributing factors. The effects of the peak acceleration of the external shock pulse, the pivot hub motion, the air bearing suction force and the disk motion on the bouncing characteristics of the lift-tab were studied by evaluating the bouncing distance and bouncing height of the lift-tab as well as the indentation depth at the tab-ramp interface. The simulation results indicate a different behavior of the suspension close to the base plate (B) compared to that close to the cover (C). The bouncing distance and bouncing height were larger for Suspension C compared to Suspension B. For the latter, the motion of the pivot hub is an important contributing factor to the bouncing distance and bouncing height. Moreover, the indentation depth increases significantly with increasing peak acceleration. For suspension C, both the bouncing distance and the bouncing height increase almost linearly with increasing peak acceleration. The vibration of the disk changes the dimple separation height and the air bearing force during an unloading process, thus affecting the bouncing behavior of the lift-tab. The effect of the suction force on the bouncing of the lift-tab is coupled with the disk position. When the lift-tab exceeds the dimple separation height for a disk raised relative to its original position, the suction force can decrease the bouncing height of the lift-tab significantly, compared to the condition without a suction force.

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Section: Introductionmentioning

confidence: 98%

Shock effects on the performance of the interface between the moving suspension lift-tab and the ramp in a load/unload drive

Shao

et al. 2009

Microsyst Technol

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“…A correlation between linear drop test and tilt drop test was set up. Lin [7] developed a two-head HDD model in ANSYS. A semi-sine acceleration pulse is applied to the base of the HDD, the duration of the semi-sine pulse, the thickness of the disk and the stiffness of the bearing were studied for the non-operating shock.…”

Section: Introductionmentioning

confidence: 99%

The pulse width effect on the shock response of the hard disk drive

Luo

Shu

Shi

et al. 2007

International Journal of Impact Engineering

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“…HDD was created by Lin (2002) using ANSYS. In that analysis, the effect of shock on a non-operational HDD was studied.…”

Section: Introductionmentioning

confidence: 99%

Shock response analysis of hard disk drive using flexible multibody dynamics formulation

2006

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Recent development of the shock analysis on the HDD is briefly reviewed. A flexible multi-body dynamics formulation is developed to simulate the shock response of the HDD. If one component in the HDD is changed, only mode shapes and frequencies of that component should be re-calculated and then used to obtain the system's response. Steady state Reynolds equation is solved to obtain the air pressure on the slider and disk for various slider positions. An air pressure table is formed and used to model the nonlinear air bearing during the simulation. Responses of flying height for different direction and shock duration time are analyzed. Results show that the flying state of the slider is more sensitive to the shock with shorter duration time.

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Finite Element Analysis of a Computer Hard Disk Drive Under Shock

Cited by 19 publications

References 7 publications

Shock effects on the performance of the interface between the moving suspension lift-tab and the ramp in a load/unload drive

Shock effects on the performance of the interface between the moving suspension lift-tab and the ramp in a load/unload drive

The pulse width effect on the shock response of the hard disk drive

Shock response analysis of hard disk drive using flexible multibody dynamics formulation

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