基于双向扫描算法的小线段速度规划  

Micro line blocks velocity planning based on bidirectional scan algorithm

作　　者：黄昕[1,2] 李迪[1] 李方[1] 何英武 

机构地区：[1]华南理工大学机械与汽车学院,广东广州510641 [2]广州数控设备有限公司,广东广州510165

出　　处：《计算机集成制造系统》2009年第11期2188-2192,2203,共6页Computer Integrated Manufacturing Systems

基　　金：国家自然科学基金资助项目(50575075);粤港关键领域重点突破资助项目~~

摘　　要：为提高数控系统加工产品的速度,提出了基于双向扫描算法的小线段速度规划方法。以直线加减速为例,导出小线段加工过程中进给速度的关键约束条件,建立了小线段高速加工的衔接速度规划数学模型,提出一种以最大进给速度为目标的双向扫描算法,以获得路径段衔接点处的最优进给速度。该方法通过对加工路径的正反向扫描,得到满足小线段路径的几何特性和机床的物理限制等多种约束的衔接点进给速度可行域。仿真和加工结果表明,该方法能实现衔接点进给速度的高速衔接,大大提高了加工效率。To improve processing speed for Computer Numerical Control （CNC） products, a velocity planning method of micro line blocks based on bidirectional scan algorithm was presented. Based on linear acceleration and deceleration, the key feed-rate constraints of the micro line blocks machining process were deduced and a velocity planning mathematical model for path connection point was established, and a bidirectional scan algorithm was put forward which was aimed to have maxi mum feed-rate, And it was used to achieve maximum productivity in machining of consecutive micro line blocks with high speed. Through the forward and backward scanning of the machining path, a feed rate feasible region could be oblained, which satisfed many constraints such as geometric property of micro line path and physical restrictions of the machine tool. Simulation and machining results demonstrated that the algorithm could achieve high velocity on the connection point of tool path, and the machining efficiency could be improved dramatically.

关 键 词：双向扫描算法 速度规划 进给速度约束 高速加工 数控系统 

分 类 号：TP273[自动化与计算机技术—检测技术与自动化装置]