基于规划单元的连续微小直线段在线规划算法

发布时间：2018-01-15 04:33

本文关键词：基于规划单元的连续微小直线段在线规划算法　出处：《计算机集成制造系统》2017年11期 　论文类型：期刊论文

【摘要】：为提高数控系统中连续微小直线段的规划效率/解决跨段插补问题,提出规划单元的概念,通过将诸多微小直线段划分为规划单元进行速度规划,根据规划单元内部各控制点的加速度约束、加工误差约束、跨段插补约束和指令速度约束等速度约束条件,计算出规划单元的进给速度和终点速度。为了实现微小直线段加工的连续变速过程,提出线速度前瞻算法,并结合规划单元定义给出前瞻规划单元的最小理论长度,建立前瞻缓存区,通过速度回溯算法实现缓存区内部规划单元速度规划过程。结合口腔修复体数控机床的加工代码轨迹对基于规划单元的连续微小直线段速度规划算法进行验证,结果表明该算法能够满足口腔修复体高速连续加工。
[Abstract]:In order to solve the planning efficiency / improve the NC system of continuous micro line cross section interpolation problem, put forward the concept of planning unit, through the many tiny line segments are divided into planning unit velocity planning based on acceleration constraint programming unit inside the control points, the machining error constraint, cross section interpolation constraint and instruction speed restriction speed the constraint conditions, calculate the planning unit speed and the end point. In order to achieve continuously variable speed process of micro line machining, the line speed forward algorithm, and combined with the theory of minimum length planning unit defined forward planning unit, establish a forward buffer, through the speed of backtracking algorithm for buffer unit internal planning and velocity planning process with dental CNC machining code on trajectory planning unit of continuous micro line velocity planning algorithm based on The results show that the algorithm can meet the high speed and continuous processing of dental prosthesis.

【作者单位】：清华大学机械工程系;清华大学精密超精密制造装备及控制北京市重点实验室;
【基金】：“十二五”科技重大专项资助项目(2011ZX04004-012)~~
【分类号】：TG659;TP301.6
【正文快照】： 0引言数控系统加工复杂曲面曲线时,一般由商业CAD/CAM软件在误差精度约束下将连续光滑轨迹离散成G01形式的连续微小直线段轨迹[1],再由数控系统按离散微小直线段进行加工。而且CAD/CAM软件生成的微小直线段数量越多,微小直线段长度越短,离散后的微小直线段轨迹与理想轨迹之

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