동흡진기를 이용한 광디스크 드라이브의 진동저감

Abstract

A dynamic vibration absorber(DVA) is developed to reduce the excessive focusing vibration of an Optical disc drive(ODD) originated from the resonance of an wobble disc. We design the material properties of the DVA by FEM model such as Young's modulus, damping coefficient, shapes and dimensions, analyze its dynamic characteristics and provide its design guide line for suppressing the vibration of an optical disc drive. To examine the performance of the DVA, the vibraion of the wobble disc and the feeding system is measured by using a laser vibrometer and the noise level is checked by using microphone. The result shows that the proposed DVA reduces the vibration and the noise in an optical disc drive.