关键词: 数控系统, 速度规划, 轮廓误差, 并行算法

Abstract: To improve the high speed machining efficiency of Numerical Control (NC) and to make the algorithm more effective,a dynamic contour error constraint model in feed-rate planning of continuous micro line segment trajectories was proposed,which established the constraint condition of contour error on velocity of end point.A parallel feed-rate planning algorithm based on Graphics Processing Unit (GPU) was presented,and the trajectories were divided equably by introducing feed-rate planning concept,which could improve the load balancing of parallel computing as well as make each parallel line compute independently.The experiment result showed that the proposed algorithm could realize the smooth feed-rate and guarantee the contour accuracy requirements.The efficiency of parallel algorithms was improved exponentially  compared with the traditional method.

Key words: numerical control system, feed-rate planning, contour error, parallel algorithm