摄动法研究硬盘磁头滑块动态飞行特性  

STUDY ON DYNAMICAL FLYING CHARACTERISTICS OF SLDIER IN HARD DISK DRIVES BY PERTURBATION METHOND

作　　者：杨廷毅[1] 白雪[1] YANG Ting-yi;BAI Xue(School of Mechanical Engineering,Shandong University of Technology,Zibo 255049,China)

机构地区：[1]山东理工大学机械工程学院,淄博255049

出　　处：《工程力学》2018年第11期223-231,共9页Engineering Mechanics

基　　金：国家自然科学基金项目(51505262)

摘　　要：硬盘工作时,磁头滑块飞行在磁盘上方,其动态飞行特性对硬盘工作性能有重要影响。该文利用摄动法推导了磁头滑块的气膜刚度和阻尼摄动方程,且通过有限体积法进行求解,获得了初始摄动条件下的气膜刚度和阻尼矩阵。结合磁头滑块动力学方程,研究了扰动速度、扰动俯仰角和扰动侧倾角对磁头滑块动态飞行特性的影响。研究结果表明:(1)扰动速度会导致磁头滑块向磁盘表面作竖直方向的移动,增加了与磁盘接触碰撞的风险;(2)扰动俯仰角或侧倾角的增加都会导致磁头滑块振动幅度的增加,但扰动俯仰角更容易引起磁头滑块的振动。In an operational hard disk drive(HDD),a slider is flying over a rotational disk and the dynamical flying characteristics of the slider have important effects on the performance of the HDD.By using the perturbation method,the perturbation equations for the gas film stiffness and gas film damping of the slider are derived,and the perturbation equations are numerically solved by the finite volume method(FVM).The gas film stiffness matrix and gas film damping matrix are obtained with an initial perturbation condition.Based on the dynamical equation of the slider,the effects of disturbance velocities,disturbance pitch angles and disturbance roll angles on the dynamical flying characteristics of the slider,are studied.The study results show that the perturbation velocities can cause the slider to move toward the disk,which increases the collision risk of the slider with the disk.The increases of disturbance pitch angles and disturbance roll angles will increase the vibration amplitudes of the flying parameters for the slider,and the disturbance angles are more likely to cause the vibration of the slider.

关 键 词：磁头滑块 硬盘 摄动法 飞行特性 气膜润滑方程 

分 类 号：TH123[机械工程—机械设计及理论]