臺灣博碩士論文加值系統

本研究探討以被動式及主動式控制對抑制矩形容器內液體振盪現象之影響，被動式控制以隔板放置於矩形容器內來降低容器容器內液體振盪之波高。同時應用數位影像處理之技術將矩形容器受外力作用下，整個液面隨時間變化之情形記錄下來，以了解隔板降低波高之機制。由實驗結果顯示，隔板加於容器中央底部附近，隔板離液面愈近對最大波高之降低之效果愈好。主動式控制方面以最佳化控制法計算之結果應用於容器運動之控制，並用超音波及數位影像處理之技術將矩形容器在運動過程中，整個液面隨時間變化之情形記錄下來。由實驗結果顯示，以最佳化控制法計算之結果應用於容器運動之控制，可有效抑制容器內液體之振盪。

This research presents the results for suppressing the liquid oscillations in a rectangular tank by the methods of passive and active control respectively. In passive control, various positions of the baffle along the tank are tested. The better positions are to place the baffle around the center of the tank. Also, different baffle heights with the baffle positioned at the center of the tank are studied. Digital image processing techniques are used to record and analyze the liquid oscillations inside the tank when subjected to transient accelerations. The optimal control techniques are used in this research to calculate the acceleration trajectory of the motion of the tank. Results show that the techniques used are quite effective for suppressing the liquid slosh during the motion of the tank.

摘要………………………………………………………………………I
圖目錄……………………………………………………………………Ⅲ
符號說明…………………………………………………………………Ⅶ
第一章 緒論……………………………………………………………1
第二章 量測系統及實驗步驟…………………………………………4
2-1隔板降低矩形容器內液體振盪量測系統簡介………………………4
2-2隔板降低矩形容器內液體振盪之實驗步驟…………………………7
2-3抑制容器內液體振盪之運動控制設備簡介…………………………9
2-4抑制容器內液體振盪之運動控制實驗步驟…………………………13
第三章 隔板幾何配置對降低矩形容器內液體振盪現象之影響……17
3-1 矩形容器加速度之量測 ……………………………………………17
3-2 單一隔板置於容器中央變化隔板高對降低液體振盪之影響 ……19
3-3 隔板數對降低液體振盪之影響 ……………………………………29
第四章 降低矩形容器液體振盪之單一隔板放置位置之決定………33
4-1單擺模式模擬容器內液體液位之振盪………………………………33
4-2矩形容器內液體振盪角度與動能之關係……………………………39
4-3實驗之驗證……………………………………………………………49
第五章 抑制矩形容器液體振盪之運動控制…………………………60
5-1液體振盪之數學模式…………………………………………………60
5-2最佳化控制法求加速度與時間之關係………………………………62
5-3超音波量測液面振盪現象……………………………………………65
5-4 CCD取像系統量測液面振盪現象……………………………………72
第六章 結論 ……………………………………………………………75
參考文獻 …………………………………………………………………77
附錄一 ……………………………………………………………………79

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