| 研究生: |
康振雄 Kang, Chen-Hsiung |
|---|---|
| 論文名稱: |
可變拓樸機構之構形合成 Configuration Synthesis of Mechanisms with Variable Topologies |
| 指導教授: |
顏鴻森
Yan, Hong-Sen |
| 學位類別: |
博士 Doctor |
| 系所名稱: |
工學院 - 機械工程學系 Department of Mechanical Engineering |
| 論文出版年: | 2008 |
| 畢業學年度: | 96 |
| 語文別: | 英文 |
| 論文頁數: | 172 |
| 中文關鍵詞: | 構形合成 、可變接頭 、映至函數 、機械鎖 、可變拓樸機構 |
| 外文關鍵詞: | mechanisms with variable topologies, mechanical lock, mapping functions, variable joints, configuration synthesis |
| 相關次數: | 點閱:76 下載:10 |
| 分享至: |
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當一機構在操作過程中,若其伴隨之拓樸構造產生變化,則此機構稱為可變拓樸機構(Mechanism with variable topologies, MVTs)或變化鏈機構(Mechanism with variable chains)。可變拓樸機構的拓樸構造之所以會改變,乃是部份接頭在機構的操作過程中,其形態或運動方向發生改變所造成,使得機構的拓樸構造也隨之改變,此類接頭稱為可變接頭(Variable joints)。本論文旨在針對可變拓樸機構之構造合成提出一套系統化的方法,並探討機構在每一階段,其構形之變化情形。首先,介紹變化鏈的不同用語,包含變自由度機構、變胞機構、不連續可動機構、及可變拓樸機構。接著,針對可變接頭受到輸入運動所產生的拓樸構造特性進行分析研究,定義接頭運算及接頭間的運算法則,提出可變接頭映至函數的概念,並提出狀態間構形映至函數的方法,以求得各狀態之構形變化關係,確認其拓樸特性。再者,本論文建立基本合成推論,提出簡潔的統一化圖之概念表示法,來描述可變拓樸機構的拓樸構形變化特性。另外,以自動夾持鋸及可變號按鍵鎖二種可變拓樸機構為例,有效分析各狀態構形之轉換關係及其拓樸特性。最後,本研究依據基本概念、簡潔化的統一化圖、坐標序列、以及可動度準則,提出一套可變拓樸機構的構形合成方法,可系統化合成出新型可變拓樸機構的構形。以無變號按鍵鎖、自動夾持鋸機構、有變號按鍵鎖為例,驗證所提出方法之可行性,分別獲得一種新型無變號按鍵鎖、二十三種新型自動夾持鋸、及五種新型有變號按鍵鎖機構。
Mechanisms with multiple topological structures during the operation process are called mechanisms with variable topologies (MVTs), and their corresponding kinematic chains are called variable chains. The kinematic joints whose types and/or motion orientations are changeable during the operation process of an MVT are called variable joints. The MVTs are usually designed for satisfying multiple design requirements. This work presents a systematic design methodology for MVTs and determines the variability configurations of mechanisms subject to the design requirements at each stag. First, locutions of mechanisms with multiple configurations including kinematotropic, metamorphic, discontinuously movable mechanisms, and MVTs are introduced. Then, the topological characteristics of variable joints subject to input motions are investigated. The operation as well as its principles are defined, and the concept of mapping functions of variable joints is provided. A mapping function method is provided to describe the topological characteristics of mechanisms and to determine the relationships of mechanism configurations between different stages. Moreover, fundamental synthesizing corollaries are established. Then, the concept of the simplified unified graph that represents topological changes in an MVT is used to address the configuration of MVTs. A sawing mechanism and a mechanical lock with variable passwords are exemplified to analyze their topological characteristics and configuration transformations of MVTs. Finally, according to the fundamental concepts, simplified unified graph, coordinate sequence, and mobility criterion at each stage, a design methodology is proposed for the configuration synthesis of MVTs. A mechanical lock with invariable passwords, a sawing mechanism, and a mechanical lock with variable passwords are exemplified to verify the feasibility of the design methodology. And, one new mechanical lock with invariable passwords, twenty-three new sawing mechanisms, and five new mechanical locks with variable passwords are obtained.
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