| Summary: | 博士 === 國立成功大學 === 機械工程研究所 === 79 === The purpose of this work is to propose a methodology for ceative mechanism
design such that every step of the design process can be systematic. And,
this design process can further be implemented into an expert system for
the automatic creation of all possible required design concepts. First,
the creative design process is introduced and illustrated by using
motorcycle suspension mechanisms as an example. Next, the topological
structures of mechanisms, including a vew matrix representation and a vew
formula for calculating degrees of freedom, are defined. Then, each step
of the design process is described in detail. The first step is to define
the generalizing rules such that generalized forms of mechanisms are
obtained. This provides desiners to represent design requirements and
constraints clearly. the second step is to generate the atlas of kinematic
chains based on the concept of contracted link adjacency matrices. Here,
the permutation group is applied to avoid generating isomorphic kinematic
chains, the loopdecreasing method is used to elude generating degenerate
kinematic chains, and the idea of basic contracted chains is adopted to
sketch kinematic chains automatically. The third step is to define
specializing rules and procedures such that the required specialized
mechanisms can be obtained. Furthermore, Polya''s theorem is applied to
check the number of specialized mechanisms. Finally, the whole design
process is implemented into an expert system namely MEXPERT. The result of
this research provides design engineers an excellent tool for the
systematic and automatic generation of all possible design concepts of
mechanisms.
本研究之目的在於提出一套創造性機構設計的方法，使設計過程中的每一個步驟皆能
系統化，進而發展成專家系統，以自動產生所有合乎需求的機構設計概念。首先，介
紹創造性機構設計的程序，並且以設計機車懸吊機構為實例，說明此程序的步驟和可
行性。其次，定義機構之拓樸構造特性，包括提出新的矩陣表示法，和修正機構的自
由度公式。接著，探討創造性機構設計程序中每一個步驟的原理和細節。其中，第一
個步驟是定義機構一般化的規則，使機構轉化為一般化運動鏈的形式。以便設計者更
清楚的表達設計需求和限制。第二個步驟是直接合成縮桿鄰接矩陣，來產生所有合乎
需求的運動鏈目錄，並且以排列群來避免產生同構運動鏈，以遞減迴路法來避免產生
退化運動鏈，以及以基本縮鏈的形狀來繪製運動鏈的圖形。第三個步驟是訂定運動鏈
的特殊化規則和程序，將各種類型的連桿和拉頭分配至運動鏈上，以產生所有合乎設
計需求的機構。同時應用Polya 定理，來計算特殊化機構的數目，做為特殊化結果的
印證。最後，本研究提出整個創造性機構設計的知識表示法，和專家系統的架構，並
且實際發展成一個專家系統(MEXPERT) ，來自動執行創造性機構設計之程序。本研究
成果提供了設計工程師一個很好的工具，以便系統化且自動化的產生所有可能的機構
設計概念。
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