基于装配语义的航天产品虚拟装配过程仿真方法

针对虚拟装配仿真过程中大量人机交互操作带来的效率低的问题，提出一种基于装配语义的虚拟装配过程仿真方法.通过分析航天复杂产品装配工艺，提取出4类典型装配操作并进行装配特征的参数化表达；通过匹配装配语义的装配特征基本信息和几何图元信息，实现了从语义层到特征层、几何层的装配语义层次化解析；从装配特征中解算出装配对象间的约束关系后，根据装配约束关系给定的运动方向和顺序，生成相应的位姿变化矩阵，驱动执行对象完成装配过程仿真.基于Delmia设计并开发了原型系统，以某卫星导航仪的装配过程仿真为例，对上述方法进行了验证. 

A Virtual Assembly Process Simulation Method Based on Assembly Semantics

Aiming at the low efficiency caused by a large number of human-computer interaction operations in the virtual assembly simulation process, a virtual assembly process simulation method based on assembly semantics was proposed. Four typical assembly operations were extracted and the assembly characteristics were parameterized by analyzing the assembly process of complex aerospace products. Matching the assembly feature basic information and geometric primitive information of the assembly semantics, hierarchical analysis of assembly semantics was carried out from semantics layer to geometric feature layer. By solving the geometric constraints of the assembly features, according to the movement direction and order given by the assembly constraint relationship, the corresponding posture change matrix was generated to drive the execution object to complete the assembly process simulation. A prototype system was designed and developed based on Delmia, above process was verified by taking the assembly process simulation of a satellite navigator as an example.