CAJ | 학술논문

考虑速度滑移效应,利用雷诺方程和动力学方程组建立磁头/硬盘薄膜气体润滑动力学分析模型,采用摄动法对纳米飞行高度以下的磁头动态特性进行了数值分析.结果表明,外界扰动频率靠近或超过磁头特征振动频率时,外界振动对磁头飞行姿态有明显影响,使得飞行高度振幅和气膜刚度明显增加,磁头的顺从性变差;当外界扰动频率远低于磁头特征振动频率时,随着磁头飞行高度的降低,气膜刚度和飞行高度的调制量迅速增加.通过磁头/磁盘系统的合理设计,使得磁头特征频率远大于主要的扰动频率,增加磁头对磁盘振动的顺从性,可以控制磁头的飞行高度振幅.
고필속도활이효응,이용뢰낙방정화동역학방정조건립자두/경반박막기체윤활동역학분석모형,채용섭동법대납미비행고도이하적자두동태특성진행료수치분석.결과표명,외계우동빈솔고근혹초과자두특정진동빈솔시,외계진동대자두비행자태유명현영향,사득비행고도진폭화기막강도명현증가,자두적순종성변차;당외계우동빈솔원저우자두특정진동빈솔시,수착자두비행고도적강저,기막강도화비행고도적조제량신속증가.통과자두/자반계통적합리설계,사득자두특정빈솔원대우주요적우동빈솔,증가자두대자반진동적순종성,가이공제자두적비행고도진폭.
Frequency-amplitude character for magnetic head/disk was investigated when flying height of slider is below 10 nm. Mathematical model was derived based on Reynolds equation and dynamic ones for gas lubrication with consideration of velocity-slip effect. Then, numerical analysis was carried out with perturbation method. It is found that the perturbation has significant influence on the slider attitude, the dynamic flying-height amplitude and film rigidity increase greatly, when the perturbation frequency approaches to or gets higher than that of the slider. And the height amplitude and rigidity increase with the decreasing flying height, when the perturbation frequency is close to that of the slider. So the dynamic flying-height amplitude can be under control by the means of increasing the slider characteristic frequency much higher than that of the perturbation in slider design.