Abstract
Dynamic responses of the head-disk interface (HDI) and other mechanical components, such as suspension, disk, ramp and base are critical to the mechanical robustness of a hard disk drive (HDD) during the operational shock (op-shock). The conventional op-shock simulations use the simplified linear spring model to decouple the structural and air bearing analyses. This paper presents a coupled field analysis method to integrate the air bearing model with the reduced structural model based on the finite element model of the full HDD, including the all major mechanical components for op-shock simulations. The dynamics of HDI and mechanical components in HDDs during the op-shock are then investigated by simulations. The effects of air bearing nonlinearity and the disk-ramp contact on the HDI responses to op-shocks are evaluated and understood by comparisons to the simplified linear model. The results reveal that conventional de-coupled simulation methods are no longer valid for the complicated nonlinear op-shock events, especially when the disk ramp contacts or slider-disk contacts are considered. The newly developed coupled-field method is suitable for such op-shock simulations by considering the complexity of the system nonlinearity.
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References
ANSYS, ANSYS Inc., http://www.ansys.com
Harrison JC, Mundt MD (2000) Flying height response to mechanical shock during operation of a magnetic hard disk drive. ASME J Tribol 122(1):260–263
Jayson EM, Murphy J, Smith PW, Talke FE (2003) Effects of air bearing stiffness on a hard disk drive subject to shock and vibration. ASME J Tribol 125(2):343–349
Li L, Bogy DB (2013) Numerical analysis of head disk interface response during operational shock with disk-ramp contact. IEEE Trans Magn 50(4):1–6
Lim G, Park KS, Park NC, Park YP, Lee YH, Chang YB, Kim CS (2015) Design parametric study on the influence of anti-shock performance during operational condition for a 2.5 inch HDD. Microsyst Technol (in press)
Liu MJ, Lin WZ, Yap FF, Ong EH (2009) Feasibility of modeling air bearing as linear springs in hard disk drive dynamics simulation. IEEE Trans Magn 45(11):4941–4944
Rai R, Bogy DB (2011) Parametric study of operational shock in mobile disk drives with disk–ramp contact. IEEE Trans Magn 47(7):1878–1881
Salimbahrami B, Lohmann B (2006) Order reduction of large scale second-order systems using Krylov subspace methods. Linear Algebra Appl 415:385–405
Yu SK, Liu B, Hua W, Zhou WD (2006) Contact-induced off-track vibrations of air bearing-slider-suspension system in hard disk. Tribol Lett 24(1):27–36
Yu SK, Mou JQ, Hua W, Zhou WD, Tan CC (2015) Operational shock response of ultrathin hard disk drives. Microsyst Technol (in press)
Zeng QH, Bogy DB (2002) Numerical simulation of shock response of disk-suspension-slider air bearing systems in hard disk drives. Microsyst Technol 8:289–296
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Yu, S., Mou, J., Hua, W. et al. Dynamics of head-disk interface in hard disk drives during operational shock. Microsyst Technol 22, 1389–1395 (2016). https://doi.org/10.1007/s00542-016-2866-7
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DOI: https://doi.org/10.1007/s00542-016-2866-7