关键词: 雅可比旋量, 变形, 公差建模, 修正矩阵, 装配精度分析

Abstract: In view of the mechanical equipment performance degradation under complex working conditions caused by unreasonable tolerance design,a method of assembly accuracy analysis that considered manufacturing and assembly errors was proposed.The finite element method was used to analyze the deformation of mechanical equipment parts,and the feature surface of deformation was extracted.Based on the new generation of Geometrical Product Specifications (GPS),the deformation of the feature was transformed into the dimension,orientation,and form tolerance,and superimposed with the design tolerance to realize the transformation of deformation to tolerance.Based on the Jacobian-Torsor theory,a tolerance analysis model was established to support the precision tolerance design of mechanical equipment.An airborne actuator was taken to compare and analyze the results of assembly accuracy considering the deformation or not.The results verified the accuracy and effectiveness of the tolerance analysis method,and a tolerance optimization design of complex products was provided.

Key words: Jacobian-Torsor, deformation error, tolerance modeling, modified matrix, assembly accuracy analysis