3D Interpreted Model: A Novel Product Definition Model by Integrating and Fusing a 3D Annotated Model and Design Knowledge

Model based definition (MBD) is the core of product digital research and development. The extension of the scope and content of the product model is an important way to improve the application ability of MBD methodology. In view of the demand of the development of the product definition method and the lack of systematic theoretical methods to support the further improvement of product model quality and ability, this paper proposes the concept of a 3D interpreted model as a new product definition model by integrating and fusing design knowledge on the basis of the MBD model. Firstly, the concept, characteristics and representation method of the 3D interpreted model are elaborated. Then, the construction method of the 3D interpreted model is proposed, which includes two steps. The first step is design knowledge annotation, which is used to integrate design knowledge with the MBD model and form the 3D interpreted model in a CAD environment. The second step is information extraction and knowledge fusion, which is used to construct a 3D interpreted model network by processing the product information and design knowledge stored in a STEP file and knowledge index file, respectively. Finally, a prototype system is developed, and the construction process of a 3D interpreted model is demonstrated and verified through an example. The results show that as a new product definition model, a 3D interpreted model realizes the comprehensive integration of a MBD model and design knowledge, so as to realize the inheritance and development of the product definition method, and supports business activities and saves more social resources.