102 ヘッドスライダのディスク表面うねりに対する追従特性と最適設計指針

概要

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This paper describes optimum air-bearing design of a tri-pad slider in terms of tracking ability to micro-waviness based on the theoretical analysis for the two-degree-of slider model and the distributed and concentrated air-bearing stiffness model. Although a short tri-pad type slider was introduced since load/unload, we point out that the 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 the 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 made be 1.2∿1.3 times the wave length of the higher mode resonance frequency. Since the moment stiffness of the front air-bearing prevents the head-gap from tracking the micro-waviness, the front air-bearing length should be made short.
社団法人日本機械学会の論文
2002-03-22