Research On Integration Design Method Of Mechanical Product Systems Based On Similarity Unit Substitution

In this paper, by using the principles of systems science and similarity engineering, the integration design method of mechanical product systems based on similarity unit substitution is established. The objective is to solve the problem of design by reuse in CAD process, supporting modification design and creation design.The fundamental concepts of design by reuse and mechanical systems design are presented. The steps of design by reuse based on similarity unit substitution and system integration design method based on units are discussed. The modeling method of similarity mechanical product case prototypes and bases are studied. By using the similarity measurement method in similarity engineering, the similarity degrees between the design purpose and the similarity cases are determined, thus the similarity search is realized. The most similar case is used as the design prototype. Then with function decomposition and unit split, the chief function units and the assistant units are all obtained. By using similarity unit substitution technology and modification design of each function unit, system integration and whole characteristic revise are preceded. When the design request is satisfied, the design process is accomplished.