三维车削仿真的碰撞检测

在分析了目前碰撞检测主要方法的基础上,研究了三维车削仿真加工过程中的碰撞检测方法。在造型的过程中借助了多边形的概念和B_rep的造型方法;在算法上采用将三维实体间的碰撞检测转化为二维多边形间的重叠性检验;并通过多边形之间的布尔交运算来判定碰撞的发生。实现的平台为自主开发的动态三维车削仿真系统CNCSimu 2．0。仿真实例表明:该方法简化了碰撞模型,提高了碰撞检测效率。

Collision detection in process of three-dimension lathe-simulation

An algorithm for collision detection in three-dimensional (3D) lathing-simulation was developed based on the study of current collision detection methods. In modeling process, the polygon concept and B_rep molding method were employed. The algorithm converts 3D solid model into 2D polygon model, and the occurrence of collision is detected by identifying the intersections among the 2D polygons using Boolean operation. This detection method can be performed on the 3D dynamic lathing - simulation system developed by the authors. Case study verified that this method can simplify the collision model, hence accelerates the detection process.