为了研究微型硬盘驱动器在受到外界冲击激励时的动态特性,对磁头/盘界面的磁头悬臂与支承件接触面系统建立了力学模型,对施加不同冲击持续时间和加速度幅值的半正弦冲击的系统响应进行了仿真,探讨了在不同激励下磁头浮动块的冲击响应及影响空气轴承力变化的主要因素.仿真结果表明,在冲击过程中,气膜的挤压效应对空气轴承力具有一定的影响,冲击加速度幅值和持续时间的变化将影响浮动块的运动稳定性.研究结果为硬盘结构的抗冲击设计提供了理论参考和分析方法.%In order to study the dynamic characteristics of a hard disk drive subjected to external shock, a dynamic model was established to describe the head/disk interface with slider suspension and the lift-tab/ramp interface. The dynamic performance of the system subjected to external shocks with half-sinusoidal shape for different durations and amplitudes were simulated. The dynamic response of the head slider under the shocks and the main factors affecting the air bearing force were discussed. The simulation results indicated that during shock, the squeezing effect of the thin film at the head/disk interface influences the air bearing force, and the variation of the shock duration and amplitude effects the stability of the slider. The simulation results provided a theoretical reference and analytical method for design of hard disk drives with good anti-shock performance.
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