高密度硬磁盘用压电复合磁头悬浮臂

Piezoelectric Composite Suspension for High Density Rigid Disk Drives

针对硬磁盘驱动器中磁头定位两级伺服控制系统 ,利用宽度弯曲振动模式 ,设计并制备了分割电极型压电复合磁头悬浮臂。研究了复合磁头悬浮臂的动态位移特性、动态频响特性 ,以及它对读出信号脉冲幅值的影响。结果表明 :2 0 V正弦电压激励下可获得的动态位移幅值约为 1μm ;其固有谐振频率达 6 .3 k Hz,满足高密度硬磁盘对两级伺服控制系统的基本要求。

A split electrode piezoelectric composite suspension,based on the width bending mode,was designed for the dual stage servo system of rigid disk drive.The dynamic displacement driving voltage characteristics and frequency responses were studied.The influence of the composite suspension on the read writing properties was also investigated in this paper.Typically,it can generate 1 μm displacement under 20 V AC driving voltage.Its primary resonance frequency is around 6.3 kHz.All the results show that the composite suspension can be used in the dual stage servo system of high density rigid disk drives.