臺灣博碩士論文加值系統

為了使雙穩態機構所輸出力的最大值與最小值的設計可以更有彈性的調整，本研究選擇以貝茲曲線樑(Bezier curve beams)作為撓性雙穩態機構(compliant bistable mechanism)之曲線樑的外型，進行設計。Bezier曲線是一個具高調整度之特性之參數曲線，藉由此具高調整度之特性之參數曲線作為雙穩態機構之曲線樑的外型輪廓的調整，使得機構可以達到更自由地調整撓性雙穩態機構所輸出力的最大值與最小值之目的。本研究選擇以最佳化設計的方式進行此撓性雙穩態機構的設計，使用有限元素分析獲得撓性雙穩態機構的力與位移曲線，再利用基於基因演算法的最佳化設計方式，設計此撓性雙穩態機構。本研究以電腦數值控制之銑床技術製作此設計出的原型，並藉由實驗驗證其是否具有設計所要求的特性。實驗的結果與設計的結果大致符合，證實了運用Bezier曲線的高調整度之特性可以達到撓性雙穩態機構更具彈性的設計，使得撓性雙穩態機構具有不同的力與位移特性。

In order to generate desired force-displacement relation of beam type compliant bistable mechanisms, Bezier curve is adopted for the design of the beam shape of the mechanisms. Due to the versatility of the Bezier curves, the force-displacement relations of the mechanisms can be designed to meet the demand. The design of the mechanism is based on an optimization design approach. Force-displacement curves are obtained by finite element method. Prototypes are fabricated by a milling machine. The experimental force-displacement curve agrees with the design. The Bezier curved beam design has a high potential in design of beam type compliant mechanisms to meet various design requirement.

摘要 i
Abstract ii
目錄 iii
表目錄 iv
圖目錄 v
第一章 緒論 1
1.1 研究背景及動機 1
1.2 文獻回顧 1
1.3 論文架構 2
第二章 機構原理與設計概念 3
2.1 撓性雙穩態機構原理 3
2.2 撓性雙穩態機構的設計 4
2.3 Bezier曲線 4
2.4 有限元素分析 5
2.5 基因演算法與最佳化設計 5
第三章 機構設計及分析 12
3.1 雙穩態機構設計 12
3.2 雙穩態機構分析 12
3.3 最佳化設計 12
第四章 實驗與特性分析 26
4.1 原型設計製作 26
4.2 實驗裝置 26
4.3 量測結果 27
第五章 結論 37
參考文獻 38

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