Shock analysis of a head actuator assembly subjected to half-sine acceleration pulses

Shu, Dongwei; Shi, Baohui; Hui, Meng; Yap, Fook Fah; Jiang, Dazhi; Ng, Q.Y.; Zambri, R.; Lau, Joseph; Cheng, Chao-Shan

doi:10.1016/j.ijimpeng.2005.07.009

Cited by 38 publications

(13 citation statements)

References 9 publications

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“…The thickness of the suspension was found to be the most sensitive factor. Shu et al (2006Shu et al ( , 2007 performed a drop test simulation of an HDD. A pseudoresonance phenomenon was observed and investigated by finite element simulation and a simplified SDOF model.…”

Section: Shock Robustness Of Hddsmentioning

confidence: 99%

Shock Simulation of Drop Test of Hard Disk Drives

Shu

Shi

Luo

2011

Structural Dynamics of Electronic and Photonic Systems

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Section: Shock Robustness Of Hddsmentioning

confidence: 99%

Shock Simulation of Drop Test of Hard Disk Drives

Shu

Shi

Luo

2011

Structural Dynamics of Electronic and Photonic Systems

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“…Feliss et al (2007) tested the shock and vibration response of microdrives during linear and rotary shock using a scanning Laser Doppler Vibrometer and compared their results with a finite element model for both non-operational and operational conditions. In a recent study, Shu et al (2007) presented the relative displacement between the tip of the actuator arm and the pivot onto which the cantilever arm is fixed as a function of shock amplitude and duration. They verified their numerical simulation using a simplified single degree of freedom model and investigated the relationship between maximum relative displacement and frequency ratio.…”

Section: Introductionmentioning

confidence: 99%

Effect of suspension design on the non-operational shock response in a load/unload hard disk drive

Zheng

Murthy

Fanslau³

et al. 2009

Microsyst Technol

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Hard disk drives must be designed to be resistant to operational and non-operational shock (Jayson et al. in IEEE Trans Magn 38(5):2150-2152, 2002. Numerical and experimental results show that ''lift-tab separation'' and ''dimple separation'' are two possible failure modes of presently used head suspension assemblies (Murthy in Ph.D. thesis, Center for Magnetic Recording Research, University of California, San Diego, 2007). In addition, ''dimple and tongue wear'' at the interface of gimbal and dimple are areas of concern in the design and operation of high performance suspensions during shock. In this investigation, an improved numerical model for non-operational shock response of a load/unload hard disk drive is implemented by including design parameters of suspension such as dimple preload, suspension material, dimple height and the surface diameter of the dimple in the model. Results for dimple and lift-tab separation, as well as the maximum impact stress at the dimple region, as a function of preload and suspension design parameters, will be presented.

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“…Shu et al (2007) studied the influence of the pulse width and pulse amplitude of half-sine acceleration pulse in a head actuator assembly with the finite element method (FEM). Zeng and Bogy (2002) investigated the shock response of a HDD using the finite element model that includes the stationary disk, suspension, slider and air bearing.…”

Section: Introductionmentioning

confidence: 99%

Modal contribution analysis of an operating complete flexible HDD affecting the head-disk motion due to shock

2009

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This paper proposes a finite element modal and shock analysis of an operating complete flexible hard disk drive (HDD). It develops a finite element model of a complete flexible HDD including the spinning disk-spindle system with fluid dynamic bearings, the head-suspensionactuator with pivot bearings and air bearings, the base plate and cover with complicated geometry. The finite element model also includes a mounting table, which is a tetrahedron element with big mass, to simulate the shock to the HDD from the exciter. It performs the modal analysis to calculate the natural frequencies and mode shapes as well as the mode superposition to calculate the motion between head and disk. It proposes a method to determine the contribution of each superposed vibration mode to the head-disk motion of an operating complete flexible HDD due to shock. It also proposes the numerical criterion to determine the head crash due to shock, and it is applied to investigate the contribution of each vibration mode to the head-disk motion when the head-crash occurs. It shows that the coupled (0,0) disk modes play the dominant role on the head-disk motion and that the pure disk modes have no effect on the head-disk motion under the axial shock. The proposed method can be effectively applied to investigate the dynamics of a HDD and to design a robust HDD against shock to prevent the head-crash.

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Shock analysis of a head actuator assembly subjected to half-sine acceleration pulses

Cited by 38 publications

References 9 publications

Shock Simulation of Drop Test of Hard Disk Drives

Shock Simulation of Drop Test of Hard Disk Drives

Effect of suspension design on the non-operational shock response in a load/unload hard disk drive

Modal contribution analysis of an operating complete flexible HDD affecting the head-disk motion due to shock

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