Shock Vibration Control of Hard-Disk Drive Using Coupled Shock Spectrum Analysis in Time-Frequency Domain

시간-주파수 영역에서의 연성 충격 스펙트럼 분석을 통한 하드디스크 드라이브의 충격진동 제어 (현장개발사례: SAMSUNG HDD 'SPINPOINT V40/P40 SERIES')

A transient T-F(time-frequency) signal processing technique is applied to a tilt drop and a linear shock test rigs for identification of shock characteristics of hard disk drive (HDD). The T-F technique essentially tracks the shock characteristics of pivot point response as well as head slap and lift-off phenomena. From the T-F analysis result, the shock characteristic in HDD is modeled by the two degree of freedom coupled-dynamic system, which consists of actuator arm and suspension. As shock designing tool, the maximax shock response spectrum is employed for prediction of shock performance. Finally, the shock control technique is tested with newly designed actuator arm and suspension. Experimental head slap test result shows that the shock performance is much higher with the new shockproof designed model than the current model