Methode de conception pour l'assemblage basee sur la logique floue et les modeles geometriques B-Rep (French text)

Assembly design is a large research field in mechanical engineering, in which the most investigated issues are: (1) Assembly/disassembly process planning, (2) Assembly features analysis, (3) Design For Assembly evaluation.; This development work can be classified between the second and the third categories. The main issue is to automatically evaluate the assembly difficulty level of a product with geometric and technological information for each of its components. Moreover, assembly features are added to the part data structure used in FuzzyDFA, the software dedicated to the proposed approach, and hence they create an obvious link between this work and assembly features research.; A relevant literature review pointed out two main weaknesses in the former related approaches concerning: (1) The difficulty to measure characteristics of a part or a product, (2) The integration between CAD systems and the developed applications.; Herein, a design for assembly methodology based on fuzzy logic and B-Rep geometric models is detailed. Fuzzy logic serves as a decision support system that attempts to solve the first weakness cited above. Technological characteristics of a part are therefore represented by fuzzy sets. Moreover, CAD models allow retrieving the geometric characteristics required by the DFA methodology. (Abstract shortened by UMI.)...