曲线焊缝的机器人焊接轨迹规划与高频控制

doi:10.3969/j.issn.1004-132X.2023.14.009

中国机械工程 ›› 2023, Vol. 34 ›› Issue (14): 1723-1728.DOI: 10.3969/j.issn.1004-132X.2023.14.009

曲线焊缝的机器人焊接轨迹规划与高频控制

吴超群;赵松;雷艇

武汉理工大学机电工程学院，武汉，430070

出版日期:2023-07-25 发布日期:2023-07-31
通讯作者: 雷艇（通信作者），男，1988年生，助理研究员。研究方向为机器人焊接工艺、机器人焊缝跟踪。发表论文14篇。E-mail：leiting0621@whut.edu.cn。
作者简介:吴超群，男，1979年生，教授、博士研究生导师。研究方向为机器人焊接工艺、自动化设备研究与开发。发表论文63篇。E-mail：Chaoqunwu@whut.edu.cn。
基金资助:
国家自然科学基金（52275506）；中国博士后科学基金（2021M702542）；武汉理工大学技术转移荆门中心产业基金（WHUTJMZX-2022JJ10）

Robot Welding Trajectory Planning and High Frequency Control for Curved Seams

WU Chaoqun;ZHAO Song;LEI Ting

School of Mechanical and Electronic Engineering,Wuhan University of Technology,Wuhan,430070

Online:2023-07-25 Published:2023-07-31

摘要/Abstract

摘要： 机器人实时焊缝跟踪系统中，轨迹规划时间及控制延迟过高会影响跟踪精度和焊接质量。针对这一问题，结合B样条曲线插补算法和外部引导运动模块，提出一种用于曲线焊缝的分段式实时轨迹规划与控制方法。首先根据插补时间最优原则将轨迹分段，然后采用三次非均匀B样条插补每段轨迹并得到插补点，最后设计了机器人高频控制器，利用外部引导运动模块以4 ms为周期将插补点依次发送给机器人，引导机器人运动。试验结果表明，该方法在100 ms内即可完成正弦曲线焊缝的规划并引导机器人焊接，跟踪精度控制在±0.2 mm以内，实现了轨迹的快速规划和高频控制。

关键词: 焊接机器人, 轨迹规划, 插补, B样条曲线, 外部引导运动

Abstract: In a robotic real-time seam tracking system, the trajectory planning and control delay affected the tracking accuracy and welding quality. To solve this problem, a piecewise real-time trajectory planning and control method for curved seams was proposed by combining B-spline curve interpolation algorithm and EGM module. Firstly, the trajectory was segmented according to the principle of optimal interpolation time. Secondly, three times non-uniform B-spline was used to interpolate each trajectory to obtain the interpolation points. Finally, the high-frequency controller of the robot was designed. The interpolation points were sent to the robot by EGM module in a cycle of 4 ms to guide the robot movements. The experimental results show that this method may complete the planning of sine curve weld and guide the robot welding in 100 ms, and the tracking errors were controlled within ±0.2 mm, which realizes the rapid trajectory planning and high-frequency control.

Key words: welding robot, trajectory planning, interpolation, B-spline curve, external guided motion(EGM)

中图分类号:

TP242

吴超群, 赵松, 雷艇. 曲线焊缝的机器人焊接轨迹规划与高频控制[J]. 中国机械工程, 2023, 34(14): 1723-1728.

WU Chaoqun, ZHAO Song, LEI Ting. Robot Welding Trajectory Planning and High Frequency Control for Curved Seams[J]. China Mechanical Engineering, 2023, 34(14): 1723-1728.

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链接本文: http://www.cmemo.org.cn/CN/10.3969/j.issn.1004-132X.2023.14.009

http://www.cmemo.org.cn/CN/Y2023/V34/I14/1723

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曲线焊缝的机器人焊接轨迹规划与高频控制

Robot Welding Trajectory Planning and High Frequency Control for Curved Seams

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