Research On Automobile Developmenttechnology And Applicationbased Case

It has become a trend of future automobile development that enterprises research and develop new automobile by utilizing the current available automobiles. The case based automobile development technology could make full uses of the enterprises'own available products. It could bring down the cost of automobile development, and is paid more and more attention.This paper is based on"dynamic knowledge fusion of multidisciplinary collaborative innovative design"(National 863 Project No. 2008AA04Z113) and"research on knowledge fusion theory and application faced to complex product innovative design"(Shanghai Municipal Important Science and Technology Project 08JC1412000). It is also combined with the project of"numerical automobile development technology", which was undertaken by Knowledge-based Engineering of Shanghai Jiao Tong University. This paper researched on case representing, case retrieval and case revise methods during case based automobile development, according to the features of automobile development. At last, case based automobile development system was constructed. It is proved that this method is accurate and advanced.At First ,the background of case based automobile development technology was presented. The contents were introduced in order to improve the actual technology's shortcomings. Then the general thesis structure was put forward, as well as the purpose and the significance.Then the case based automobile development technology was systematically researched on. First, the knowledge reuse and case base reasoning technology in automobile development was introduced. Second, the case based automobile development method is presented. Meanwhile, several key technologies such as automobile case representing, case retrieval and case revise method were described. Third, the process and system development of case based automobile technology were separately put forward.Automobile case representing method and automobile case base were constructed. First, several kinds of single case representing methods were introduced, and then an object oriented compound case representing method was described. Second, hierarchical case base structure was adopted based on the analysis of automobile module division. The case base included several phases, such as automobile case, first sub-module case base, second sub-module (parts) case base etc.Then case retrieval and case reuse technology were introduced. First, a novel case retrieval method base on membership function was introduced after the analysis of several traditional case retrieval methods. According to different types of demand, similarity measurement modules for fuzzy numerical demand and fuzzy linguistic demand were constructed respectively. Then, automobile case hierarchical retrieval algorithm and hierarchical sub-retrieval method were put forward. Finally, automobile case revise, case evaluation and case saving methods were desperately described.At last, the case based automobile development system was constructed. First, this paper introduced the acquisition of design requirements. Then, the framework of system included the platform, structure and functional module was introduced. Finally, the example of system operation was described. This system provided friendly and efficient platform for enterprises. It could accelerate the automobile development efficiently.