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Cantilever Dynamic Vibration Absorber for Reducing Optical Disk Drive Vibration

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7 Author(s)
Seungho Lim ; Dept. of Mech. Eng., Yonsei Univ., Seoul ; Kyungtae Kim ; Ungrae Cho ; Park, No-Cheol
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This research explores the design of a dynamic vibration absorber (DVA) using a cantilever beam with tip mass. Compared to a conventional DVA using a rubber bobbin, the proposed DVA isolates vibrations more effectively due to the low damping properties of its structure, which are the principal reason for its excellent anti-vibration performance near the anti-resonance frequency. This low damping decreases the harmonic response at the rotational frequency of the disk. To design the proposed DVA, the dynamic characteristics of the optical disk drive were represented with lumped parameter and finite element models. The dimensions of the beam were tuned to reduce the vibration in multiple axes based on this model. Tolerance analysis were performed so the drive would be robust against normal dimension variance due to the manufacturing process, and the variation in the dynamic characteristics with respect to the pickup position was investigated. The anti-vibration performance of the DVA was also measured experimentally.

Published in:

Magnetics, IEEE Transactions on  (Volume:45 ,  Issue: 5 )

Date of Publication:

May 2009

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