DVM-12 EMPIRICAL ANALYSIS ON FREQUENCY DEPENDENCY OF AIRFLOW EXCITATION FOR DISK FLUTTER OF HARD DISK DRIVE(Drive Mechanisms IV,Technical Program of Oral Presentations)

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概要

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• The frequency dependency of airflow excitation causing disk flutter of hard disk drives was experimentally investigated. The frequency spectra of the disk vibration of 19 drives were measured with a laser Doppler vibrometer, and then natural frequencies, modal damping ratios, and root mean square (RMS) values of the vibrations associated with the disk modes were calculated. Moreover, the pressure fluctuation exciting each disk mode was estimated from the theoretical RMS value and vibration characteristics of the disk mode. Multiple regression analysis was performed as the independent variables were the circumferential velocity and the natural frequency and the dependent variable was the pressure fluctuation. As the results, the relationship that airflow excitation causing disk flutter is proportional to the inverse of the frequency and the square of the disk speed was confirmed to be statistically significant at a 5% significance level. In addition, the relationship between disk flutter amplitude and disk properties was derived.

• 一般社団法人日本機械学会の論文
• 2009-06-17

著者

• Eguchi Takehiko

  Mechanical Engineering Research Laboratory Hitachi Ltd.

関連論文

• DVM-12 EMPIRICAL ANALYSIS ON FREQUENCY DEPENDENCY OF AIRFLOW EXCITATION FOR DISK FLUTTER OF HARD DISK DRIVE(Drive Mechanisms IV,Technical Program of Oral Presentations)

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