3212 高速回転円板間流れに起因するディスクフラッタ及びアーム振動の実験解析

概要

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Recently, it is important to clarify air flow induced vibration issues for HDD in order to achieve ultra high magnetic recording density. We studied flow induced disk flutter dynamics as well as arm off-track vibration between corotating disks by using LDV. In particular, the effect of arm on disk flutter and arm off-track vibration was investigated. It is found that the arm which is inserted between co-rotating disks suppresses the disk flutter vibration, compared with the case without arm. The arm shape and thickness, however, do not affect the disk flutter dynamics quantitatively. In comparison with upper and lower disks, lower disk flutter was larger than upper disk flutter. In addition, it could be observed that arm off-track vibration was the largest when the arm was located on outer track of the disk.
2003-08-05