Study on the Unified Intelligent Assembly Modeling and Sequence Planning based on Design Intent

doi:10.3901/JME.2021.19.019

Abstract

Abstract: Assembly modeling and sequence planning are two important activities of digital assembly. However, they are separated with low-level of intelligence due to the loss of design intent (DI). A unified intelligent assembly modeling and sequence planning technology was investigated in this paper, based on the previous findings that it was possible to unify the two activities in a single intelligent framework. First, the overall scheme of the unification based on DI is clarified by analyzing the limitations of the previously developed intelligent assembly modeling technology based on interaction feature pair (IFP). Second, algorithms were designed for sequence planning before assembly modeling, simultaneous assembly modeling and sequence planning based on complex IFP (C-IFP) construction, part pre-assembly, and C-IFP instantiation, with the corresponding classes being introduced. Consequently, the perceptual abilities of part models have been enhanced, thus improving the level of intelligence in assembly modeling and sequence planning; in addition, the two activities are unified as a whole due to the consistent DI transmission. The feasibility of the proposed approach is verified by a simplified manipulator assembly, presenting the positive significance to break the sequential paradigm of digital assembly and enrich the corresponding theory and technology system.

Key words: assembly modeling, assembly sequence planning, unification, design intent, intelligent perception

CLC Number:

TP301

XU Zhijia, MO Shancong, TANG Wenbin. Study on the Unified Intelligent Assembly Modeling and Sequence Planning based on Design Intent[J]. Journal of Mechanical Engineering, 2021, 57(19): 208-217.

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