懸吊機構對滾珠自動平衡裝置的影響

The Effects of Suspension Mechanism on the Performance of Ball-Type Automatic Balancers

黃仕軒(Shih-Hsuan Huang)

指導教授 ： 盧中仁

國立臺灣大學/工學院/機械工程學研究所/碩士(2005年)

https://doi.org/10.6342/NTU.2005.00512

摘要

光碟機在高速運轉時常因光碟片的偏心量而產生振動，並影響碟片資料的讀取，因此如何降低光碟機的偏心振動是一個重要的研究課題。目前在光碟機減振上應用最廣泛的裝置之一為滾珠型自動平衡裝置。常用的滾珠型平衡裝置的理論模型只有單一平面上的平移振動；然而實驗機台除了平移振動外，尚有扭轉模態，因此理論模型無法充分解釋實驗結果。本論文設計了一個只有平移模態的雙平台懸吊機構。首先利用適當的假設，建立簡化模型並推導運動方程式，求得平衡位置並分析其穩定性。接著製作實驗機台，實際量測滾珠型平衡裝置在雙平台懸吊機構上的減振功效，和理論分析的結果相比對。同時比較不同懸吊機構下滾珠型自動平衡裝置的效能。

關鍵字

滾珠型自動平衡裝置 ； 偏心振動 ； 懸吊機構

並列摘要

When the optical disk drive operates at high rotation speed, the inherent imbalance of the optical disk may cause large vibrations and prohibit data transfer. Therefore, how to reduce the imbalance vibrations of optical disk drives has been an important research topic. Ball-type automatic balancers are employed widely in optical disk drive industry. Most of the theoretical models developed for the ball-type automatic balancer only consider the planar translational vibrations. However, in additional to the translational vibration modes, the experimental platform used has torsional vibration mode. Hence, the theoretical model can’t explain all the experimental results. In this thesis, we designed a dual-stage suspension system that can only move translationally in a single plane. The governing equations of this dual-stage platform were derived under suitable assumptions. We then determined the equilibrium positions and studied the stability of each equilibrium position. The vibrational signals of the dual-state platform equipped with a ball-type automatic balancer were measured. The experimental results were compared with the theoretical results. We also investigated the vibration reduction effects of the ball-type automatic balancers equipped with different suspension systems.

並列關鍵字

ball-type automatic balancer ； imbalance vibrations ； suspension mechanism

參考文獻

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