Abstract:

：Complex product design often needs various CAD/CAE systems, and the geometry construction, expression and storage of digital product are heterogeneous among these systems. Thus, it becomes extremely difficult to integrate the design models of different systems, which reduces the product design efficiency. In order to effectively integrate the semantic information and geometric features of heterogeneous CAD/CAE models, a level set based heterogeneous model fusion method is proposed. The voxel model is constructed based on distance field and the visualization method is given. The mapping relationship of distance field operation (intersection, difference and uniting) and product shape feature operation (copy, extraction and recognition) is build, and the mapping relationship of distance field operation and geometrical error, semantic information and local feature information is also constructed, accordingly, the integration of heterogeneous product model is realized. The proposed method is investigated by information fusion of geometrical error and semantic information of complex turbine blade model, and the experimental results are encouraging.

Key words: information integration, level-set method, voxelization modelling, fusion of heterogeneous model