| 研究生: |
林洺安 Lin, Ming-An |
|---|---|
| 論文名稱: |
直接加速度回授與加速度積分回授於堆疊式雙軸撓性定位平台上之振動控制 Vibration Control of a Cascaded Tow-Degree-of-Freedom Precision Positioning Stage Using Direct Acceleration and Integrated Acceleration Feedback Schemes |
| 指導教授: |
陳國聲
Chen, Kuo-Sheng |
| 學位類別: |
碩士 Master |
| 系所名稱: |
工學院 - 機械工程學系 Department of Mechanical Engineering |
| 論文出版年: | 2016 |
| 畢業學年度: | 104 |
| 語文別: | 中文 |
| 論文頁數: | 195 |
| 中文關鍵詞: | 微機電加速規 、加速度積分 、相位補償器 、直接加速度回授 、撓性定位平台 |
| 外文關鍵詞: | MEMS Accelerometer, Phase Shifter, Integrated Acceleration Feedback Control, Direct Acceleration Feedback Control, Compliant Positioning Stage |
| 相關次數: | 點閱:154 下載:12 |
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在自動化光學檢測系統運作時,為了達到更高的檢測效率,我們希望能盡量快速的啟動與停止龍門機台,使顯微鏡組能更加快速的到達目標位置。然而快速的啟動停止會引起鏡頭與待測面板間的相對運動導致所擷取的影像模糊。過去所提出的主動減振策略多以位移感測器量測位移作位移回授為主。然後在這樣的裝置下我們沒有辦法找到不受龍門機台影響的感測器安裝位置,感測器與待測平台之間相對運動的產生會影響定位結果。過去學長提出在精密定位平台及待測平台上各加裝一加速規,利用加速度積分成位移來計算兩者之間的相對運動。然而該控制策略因為加速規精度的關係未能有效應用於精密定位平台上,且加速度積分亦有相位偏移現象待解決。因此,本文對加速度經由防飄移積分器積分後的訊號進行相位補償以解決其相位偏移問題,使積分後位移訊號更貼近平台實際運動情形。同時發展不需經過積分程序的直接加速度回授控制策略。在實驗平台方面,我們以ABS材料搭配塑膠3D列印技術做為金屬3D列印定位平台的原型,建立了可以使加速規有效運作的雙軸撓性定位平台,並以此做為前述兩種控制策略的測試平台。我們對其上下平台分別設計加速度訊號積分搭配三種不同的相位補償策略的回授控制系統以及直接加速度回授控制系統,模擬其實驗結果,並進行單軸的弦波追蹤、雙軸的圓軌跡追蹤並討論其控制性能。本文中我們利用成本低且設置簡單的微機電加速規做為主感測器,尋求在未能有效安裝位移感測器時,以加速規量得加速度經防飄移積分及相位補償器後之積分器結果進行位移回授,以及直接利用加速度的直接加速度回授,建立了以加速規為主感測器的主動減振策略。
Active vibration control has been widely applied in precision mechanics. Using accelerometer instead of displacement sensor as main sensor has been brought up to the positioning stage when it’s hard to find a reference place to mount the displacement sensor. However, the phase displacement of integrated acceleration introduced by integrator might collapse the feedback control and this approach hasn’t been applied to positioning stage yet. In this thesis, we designed long-stroke compliant positioning stage that allow MEMS accelerometer able to measure reasonable acceleration signals. We processed the acceleration signals with phase shifter and filter to allow signals be used in feedback control. By integrating above results, we successfully practiced both integrated acceleration and direct acceleration feedback schemes on positioning stage. Feedback control schemes have been practiced in 1- and 2-D.O.F. stage. Both single and multiple frequencies signal have been taken as input signal. Through these experiment results, we hope to offer references for using MEMS accelerometer as main sensor for active vibration control and furthermore allow these concepts been applied on precision machine.
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