关键词: 表示精度, 装配干涉检测, 三角面片求交, 装配规划, 装配仿真

Abstract: To improve the efficiency of interference detection result in assembly planning and simulation process,the interference errors were defined based on Modeling Representation Tolerance (MRT).The MRT based 2D and 3D facet intersection test method was proposed to compute the interference quantity between the intersected facets and modify the facet relationships within the error range,so as to remove fake interference.An improved assembly interference detection algorithm was described.To achieve the efficiency and accuracy at the same time,the projective detection algorithm and discrete detection algorithm were respectively performed according to the target objects' motion trajectory.All kinds of fake interference problems could be settled by this way,and the geometrical topology and assembly constraints data were not required anymore,so the application range of this method was broad.The proposed method was implemented by an assembly design system-AeroAssem,and its feasibility and effectiveness were demonstrated by case study in geometric dismountability analysis and assembly simulation.

Key words: modeling representation tolerance, assembly interference detection, triangle intersection test, assembly planning, assembly simulation