Research And Application Of Extended Manufacturing Information Integration Based On Ontology

In the extended manufacturing mode, the structural and semantic heterogeneity existed in manufacturing information between main enterprise and extended manufacturing cell, which influence them to have sharing and semantic interoperability of the extended parts manufacturing information. Therefore, ontology is brought into extended manufacturing information integration in the thesis, and in order to solve the existing problems.Firstly, the information integration problems that existed in extended manufacturing domain are analyzed. Combining with extended manufacturing domain, several typical ontology-based information integration methods and the key techniques'research situations of them are analyzed. According to the requirements of the extended manufacturing information integration, an extended manufacturing information integration framework based on ontology is proposed, besides, the components of this framework and the processing of extended manufacturing information integration are described in detail.Then, the key techniques of the framework including extended manufacturing ontology building and semantic mapping are deeply researched. Aim at the characteristics of the extended manufacturing domain, an extended manufacturing ontology building method is presented. A sharing ontology of extended manufacturing domain is built with this method, and the mapping rules from extended manufacturing relational schema to local ontology is studied. According to the requirements of extended manufacturing information service and the semantic relations along the concepts, an ontology semantic mapping algorithm is given, which solves the automatic mapping between the extended manufacturing local ontology and sharing domain ontology.Lastly, combining with the application background of a significant national defense special project, the initial realization of the ontology-based extended manufacturing information integration system is presented, which provides an effectual method to solve the information integration in extended manufacturing domain.