基于综合约束的微小直线段速度连续规划算法  

Micro-lines Continue Federate Scheduling Based on Integrate Restriction

作　　者：周刚[1] 李岸[1] 邬义杰[2] 

机构地区：[1]浙江科技学院与汽车工程学院,杭州310023 [2]浙江大学,杭州310027

出　　处：《组合机床与自动化加工技术》2010年第10期20-25,共6页Modular Machine Tool & Automatic Manufacturing Technique

基　　金：国家自然科学基金资助项目(50575205);浙江省教育厅科研项目(Y200906343)

摘　　要：在刀具轨迹利用微小直线段进行表示的曲面高精高速加工中,存在以下几方面的约束:①相邻微小直线段之间的速度连续约束;②进给速度和端点剩余长度两者之间的相互约束;③符合给定加减速曲线的全局约束。在以上的约束条件下给出了微小直线段的速度连续规划算法,首先根据相邻直线段之间的几何关系,给出端点速度约束,根据端点速度与设定起跳数度的比较识别出高曲率点,并设置这些高曲率点为起跳点。然后在相邻起跳点之间进行一次全局速度规划,比较端点速度约束和一次全局约束的结果,调整每条直线段的起、末速度。随后根据逐步速度规划,包括前向速度约束和回溯匹配两个过程完成整个规划。根据以上算法,在软件数控系统上进行了试验,并给出了模拟和数值分析结果,表明能够应用于微小直线段的高速连续加工。There are three types of restriction in surface high speed and high precision machining if the surface toolpath is expressed by micro-lines.The first restriction is federate continue between two adjust micro-lines,the second restriction is between federate and remainder length in Micro-line end port,the third restriction is to fitting the given acc-decelerate rule.A continuous federate plan algorithm was put forward based on above three types of restriction.At first,end port federate restriction was calculated based on geometry relationship between two contiguous micro-lines.Then high curvature points were recognized if the restriction end port federate little than given jump federate,and set these high curvature points as jump points.Part global federate planning was performed between two jump points.Compare the restriction end port federate and the Part global federate planning federate,the little is selected as new restriction end port federate.At last,step by step federate planning is performed,which include forward and backward process.The algorithm is implemented on soft-CNC,the result of experiment and federate data were put forward.

关 键 词：CNC 速度规划 高精高速 局部约束 全局约束 综合约束 

分 类 号：TH16[机械工程—机械制造及自动化] TG65[金属学及工艺—金属切削加工及机床]