Reduction of Flow Induced Vibration in HDD

Overview

It is our purpose to clear mechanisms of Flow Induced Vibration (FIV) on Hard Disk Drive (HDD) and to propose way to reduce it.

The flow between rapidly-rotating disks is to become turbulence, pressure fluctuation upper and lower sides of a disk is increased. It contributes to the problem of positioning error between magnetic head and recording disk and associated track misregistration due to FIV.

In the current study, we pay attention to asymmetric vortical structure in the outer disk region and examine how interaction of structures influences disk FIV.

Recent Reports

1. Kanagai, S., Suzuki, J., Obi, S. and Masuda, S., Flow instability and disk vibration of shrouded corotating disk sytem, Trans. ASME, Journal of Fluids Engineering, 129-10, 1306-1313, 2007. doi:10.1115/1.2776958
2. Suzuki, J., Obi, S. and Masuda, S., Correlation of unsteady flow modes on two sides of a disk related to disk FIV., Micromechatronics for Information and Precision Equipment, 2006/6/21-23
3. Suzuki, J., Yamamoto, Y., Obi, S. and Masuda, S., Exciting and damping effects on flow induced vibration in corotating disk., ASME Information Storage and Processing Systems Conference, 2005/6/28-29
4. Yamamoto,Y., Obi,S., Masuda,S., Effect of disk-shroud spacing on flow induced vibration in corotating disk system, ASME Information Storage and Processing Systems Conference,2004/6/14-16
5. Kisaki,S.,Yamamoto,Y.,Obi,S.,Masuda,S., Flow Induced Vibration of Shrouded Corotating Disk System at Subcritical Range, IIP/ISPS Joint MIPE Proceedings, 2003, pp.203-204
6. Fukaya,R., Obi,S., Masuda,S., and Tokuyama,M., Flow instability and elastic vibration of shrouded corotating disk systems, Experiments in Fluids ,33,2002,pp.369-373