J162015 小型HDD用流体軸受スピンドルの揺動応答特性([J162]メカニカルデバイス・システムの知能化:機械の知能化を学際的に考える)

Abstract

This paper describes the experimental study on swaying impact response of fluid film bearing (FDB) spindle for Hard Disk Drives (HDDs). Recently, the opportunity for the HDD spindle motors exposed to external vibration has been increasing because the HDDs are used for recording device such as slimline laptop, video cameras, car navigation systems and so on. Hence, the rotating shaft contact the bearing from impact, there is a possibility of data loss. In order to avoid the problems, it is extremely important to know how the spindle moves against the large impact on HDDs experimentally. However, as far as the authors know, there are few experimental studies treating the swaying impact response. In this paper, firstly, we propose a new test rig and experimental method for impact response of FDB spindle. Then we conduct the swaying impact test on FDB spindle for 2.5" HDD and show the experimental results of swaying impact response waveform and maximum displacement of disk.