Generalized look-ahead feedrate planning algorithm

• Article •

Generalized look-ahead feedrate planning algorithm

DONG Jing-chuan1,2, WANG Tai-yong1,2, WANG Zi-jing3, LI Bo1,2, DING Yan-yu1,2，JIANG Yong-xiang4

1.School of Mechanical Engineering, Tianjin University, Tianjin 300072, China;2.Key Laboratory of Mechanism Theory and Equipment Design, Ministry of Education, Tianjin University, Tianjin 300072, China;3.TDNC Technology Co., Ltd., Tianjin 300192, China；4.School of Mechanical Engineering, Tianjin University of Technology and Education, Tianjin 300222, China

Received:2013-03-25 Revised:2013-03-25 Online:2013-03-25 Published:2013-03-25

通用型前瞻速度规划算法

董靖川1,2，王太勇1,2，王自静3，李勃1,2，丁彦玉1,2,蒋永翔4

1.天津大学机械工程学院，天津300072；2.天津大学机构理论与装备设计教育部重点实验室，天津300072；3.天大精益数控技术有限公司，天津300192;4.天津职业技术师范大学机械工程学院，天津300222

Abstract

Abstract: The feedrate planning is a key function in Computerized Numerical Control (CNC) controller. In the high speed and high precision machining process, the look-ahead feedrate planning algorithm was essential for optimizing the feedrate curve, saving machining time and improving machining quality. Therefore, a generalized look-ahead feedrate planning algorithm was proposed. On the premise of satisfying the constraints of feedrate, this algorithm could preread tool path and realize look-ahead feedrate planning. The planning units were used to divide the tool path, and different kinds of look-ahead feedrate planning were realized by abstracting and encapsulating the acceleration/deceleration algorithm. Thus the reconfiguration for feedrate's control algorithm was realized. The simulation and experiment results showed that the proposed algorithm was correctly reconfigured with different acceleration/deceleration schemes. The real-time look-ahead planning for feedrate was realized, and the machining efficiency and motion smoothness of CNC was improved.

Key words: numerical control system, feedrate, look-ahead planning, reconfiguration, acceleration/deceleration

摘要： 为优化进给速度曲线，节约加工时间并提高加工质量，提出一种通用的前瞻速度规划算法。该算法可以在满足进给速度约束条件的前提下，对加工路径进行预读，实现进给速度的前瞻规划处理。算法以规划元为单位对加工路径进行划分，通过对加减速算法的抽象和封装实现不同种类的前瞻速度规划，以及对进给速度控制功能算法的重构。仿真和实验表明，该算法在几种不同加减速方式下都可以正确重构，实现进给速度的实时前瞻规划，改善数控机床的加工效率和运动平稳性。

关键词: 数控系统, 进给速度, 前瞻规划, 重构, 加减速

CLC Number:

TP273

DONG Jing-chuan1,2, WANG Tai-yong1,2, WANG Zi-jing3, LI Bo1,2, DING Yan-yu1,2，JIANG Yong-xiang4. Generalized look-ahead feedrate planning algorithm[J]. .

董靖川1,2，王太勇1,2，王自静3，李勃1,2，丁彦玉1,2,蒋永翔4. 通用型前瞻速度规划算法[J]. .

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