非動作時におけるヘッド/ディスクインタフェースの耐衝撃性能に関する実験的研究

概要

論文の詳細を見る
Experimental studies on shock-proof performance of head/disk interface (HDI) subjected to half-sine shock acceleration during nonoperation have been carried out. Damages to the disk surface due to the collision between the head and disk have been assessed by measuring the degradation of the recorded signals. The results are as follows. When the inertia acting on the head suspension assembly (HSA) exceeds loading force of the head under shock acceleration, the HSA jumps away from the disk surface and springs back. Its movement is the most essential phenomenon. Higher loading force and less equivalent mass of HSA reduce surface damage. The effect of duration of acceleration on damage is not related to the resonance frequency of the disk but to that of HSA in the axial direction. Thin disks contribute to reduce the damage because of energy loss due to their lower rigidity. In order to improve shock-proof performance, it was demonstrated that a glass disk is much more superior to an aluminum disk in terms of shock resistance because of its high hardness. A stopper mechanism has been newly developed to prevent HSA from jumping away. Finally, much higher shock-proof performance has been realized by means of combining the glass disk and stopper mechanism.
一般社団法人日本機械学会の論文
1994-08-25