Reduction of Vibro-acoustic Noise for Optical Image Stabilizer VCM Using Electromagnetic-Mechanical-Acoustic Coupled Analysis Method

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  • Yoo Byungjin
    Department of Adaptive Machine Systems, Graduate School of Engineering, Osaka University
  • Hirata Katsuhiro
    Department of Adaptive Machine Systems, Graduate School of Engineering, Osaka University

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Other Title
  • 有限要素法を用いた磁界・構造・音響の連成解析手法による手振れ補正用VCMの構造放射騒音低減に関する研究
  • ユウゲン ヨウソホウ オ モチイタ ジカイ ・ コウゾウ ・ オンキョウ ノ レンセイカイセキ シュホウ ニ ヨル テ フレ ホセイヨウ VCM ノ コウゾウ ホウシャ ソウオン テイゲン ニ カンスル ケンキュウ

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Description

The optical image stabilizer (OIS) system using a voice coil motor (VCM) has recently been widely adopted in digital cameras to minimize blurring and provide image stabilization. Since customers buying digital cameras with an OIS are concerned with the noise level in addition to the primary performance, camera manufacturers have been making efforts to reduce acoustical noise. This paper proposes an electromagnetic-structural-acoustic coupled analysis method that uses the FEM; measurements were carried out for verification. The proposed method was used to redesign the cover structure of the VCM to reduce acoustical noise.

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