Ontology-based optimization integration for design knowledge of complicated product

To solve problems such as high knowledge redundancy and unsatisfactory optimization of integration results existed in design knowledge integration of complicated product,a knowledge integration device based on ontology of design knowledge was put forward. The device transformed design knowledge integration into ontology integration between local ontology and global ontology. To achieve the ontology integration,a model of design knowledge ontology was constructed firstly based on analysis of composition of collaborative design knowledge. On this basis,a knowledge integration device with ontology construction,ontology mapping and ontology merging at major modules was designed. Quantitative estimation method for similarity in ontology mapping was presented and ontology integration was realized. Finally,an application case was presented to illustrate the validity of the integration method.