本研究主要探討滾珠型自動平衡裝置對於光碟機中的光學讀取模組承載機構非平面運動之影響。首先建立加裝自動平衡裝置之光學讀取模組承載機構的物理模型和定義公式推導需要的座標系統，接著利用Lagrange方程式推導加裝多軌多顆滾珠的自動平衡裝置之光學讀取模組承載機構的3-D剛體運動方程式；其次利用套裝軟體Matlab進行數值模擬分析得到自動平衡裝置對系統非平面運動的影響，同時分析光學讀取模組承載機構的動態特性及單軌一顆滾珠和單軌兩顆滾珠之自動平衡裝置對於光學讀取模組承載機構振動問題之改善，從數值模擬分析結果得知影響自動平衡裝置滾珠定位的系統參數，例如：承載機構隔振墊圈之彈性係數和阻尼係數；最後提出加裝自動平衡器之光學讀取模組承載機構的設計準則以期改善光碟機系統因動不平衡所造成的振動問題，並且建議未來可持續進行的研究方向。

This thesis presents a three-dimensional dynamic analysis for the non-planar motion of the rotor equipped with an automatic ball balancer (ABB). ABB is a device for reducing the unbalanced mass of the optical disk drive. The major components of the disk drive can be divided into two categories: rotating and non-rotating parts. The rotating parts constitute “the equivalent rotor” which contains the disk, automatic ball balancer, and the rotor of the spindle motor. The non-rotating parts constitute “the equivalent stator” which consists of the foundation structure and the stator of the spindle motor, and pick-up head with its drive unit. The stator is modeled as a suspension system with three- dimensional motion in which the vertical motion results from the rocking motion of the disk.
A simplified physical model and the coordinate systems for describing the non-planar motion of the equivalent rotor of an optical disk drive are first defined in this thesis. Secondly, employ Lagrange method to derive equations of motion for the rotor equipped with an ABB. Thirdly, use the commercial software Matlab to perform numerical simulation and analysis. From the results, the angle of the non-planar motion of the rotor equipped with ABB increases in comparison with that without ABB. Besides, the ABB’s dynamic balancing behaviors are influenced by the propertied of the rotor’s suspension. Finally, design guidelines are provided for ABB design engineers.

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