Analysis of Tracking Characteristics and Optimum Design of Tri-Pad Slider to Micro-Waviness
Analysis of Tracking Characteristics and Optimum Design of Tri-Pad Slider to Micro-Waviness
复制标题
三垫滑块微波纹跟踪特性分析及优化设计
DOI：
10.1115/1.1510882
复制
发表时间：
2002
影响因子：
2.5
通讯作者：
K. Iida
中科院分区：
文献类型：
--
作者：
M. Yamane;K. Ono;K. Iida
本文在对二自由度滑块模型和分布集中气浮刚度模型进行理论分析的基础上，从对微波度的跟踪能力出发，对三垫块滑块的气浮优化设计进行了研究。虽然通过加载/卸载技术引入了短三垫块类型的滑块，但我们指出，这种类型的滑块在对微波波动度的跟踪能力方面优于传统的轨道式滑块。更重要的是，头部间隙位置与后部气浮中心之间的距离应尽可能小。如果将前后气浮中心的位置设置在冲击中心，则可以消除由于低模共振而引起的间距变化。如果将后气垫片的长度设计为高阶模式共振频率波长的1.2∼1.3倍，则可以减小高阶模式在间距变化中的共振幅度。由于前气浮轴承的力矩刚度使磁头间隙不能跟踪微波动，因此应缩短前气浮长度或增大前后气浮刚度之比。如果必须减小低模的共振幅度，则前气浮长度应设计为低模共振频率波长的1.2∼1.3倍。
This paper describes optimum air-bearing design of a tri-pad slider in terms of tracking ability to micro-waviness based on theoretical analysis of the two-degree-of-freedom slider model and the distributed and concentrated air-bearing stiffness model. Although a short tri-pad type slider was introduced through the load/unload technique, we point out that this type of slider is superior to the traditional rail type slider in terms of tracking ability to micro-waviness. More importantly, the distance between head-gap position and the rear air-bearing center should be made as small as possible. The spacing variation due to lower mode resonance can be eliminated if the positions of front and rear air-bearing centers are located at the center of percussion. The resonance amplitude of the higher order mode in spacing variation can be reduced if the length of the rear air-bearing pad is designed to be 1.2∼1.3 times the wavelength of the higher mode resonance frequency. Since the momental stiffness of the front air-bearing prevents the head-gap from tracking micro-waviness, the front air-bearing length should be made short or the ratio of rear to front air-bearing stiffness should be made large. If the resonance amplitude of the lower mode must be decreased, the front air-bearing length should be designed to be 1.2∼1.3 times the wavelength of the lower mode resonance frequency.