硬盘两级伺服磁头定位系统的建模与仿真

Modeling and Simulation of a Dual-stage HDD Head Positioning Servo System

为了实现更快捷和精确的硬盘磁头定位,在硬盘固有的音圈电机上附加一个压电微激励器,从而构成了硬盘两级伺服磁头定位系统.要对这种定位系统进行研究,就必须建立系统物理模型.将系统等效成一个三自由度的弹簧滑块模型,并对该模型进行了仿真研究.仿真结果表明,这种模型能很好地反映系统的内部结构,这为以后磁头精确定位控制的研究提供参考.

Hard-disk drive is one of the most important parts in the computer.To provide faster and more precise positioning of the hard disk drive（HDD） head onto a target track,an additional piezoelectric microactuator（MA） is mounted on top of the existing voice-coil-motor（VCM） actuator,resulting in a so-called dual-stage hard disk drive（HDD） head positioning servo system.To research this system,it is necessary to set up the model.This paper mainly aims at this system to set up a physical model which is a 3-DOF spring-slide model,and do simulation research.The simulation results show that this model can well reflect the system＇s internal structure,which has great help to the HDD head precise positioning.