关键词: 可视性评估, 动态观测物, 自动量化, 分层检测算法, 联合动态仿真

Abstract: To deal with difficulty and randomness of artificial visibility evaluation,an automatic quantitative evaluation method of visibility for moving observed object was proposed.The surfaces of observed object were partitioned into triangular meshes,and a virtual field-of-vision model that was similar to realistic field-of-vision was constructed,in which a number of test lines for simulating the realistic line-of-sight were filled into the virtual field-of-vision.The visible triangular meshes were screened by line-triangle intersection test.A layer-by-layer detection algorithm was proposed to improve the detection efficiency,and a quantitative evaluation algorithm was proposed to evaluate visibility factors of each moment in real time.Membership function was also introduced to provide a method for transforming digital visual assessment into linguistic one.The proposed method had been applied to a self-developed virtual assembly prototype system,and the practical results proved that the method could provide accurate and high efficient evaluation in real time,which could provide supporting data for automatic assembly location technology by considering human factors.

Key words: visibility evaluation, moving observed object, automatic quantification, layer-by-layer detection algorithm, dynamic co-simulation