Seam Yracking Control Mechanism and Theoretical Analysis of Welding Mobile Robot
Lv Xueqin1,ZHANG Ke2,WU Yixiong2
(1. School of Automation Engineering, Shanghai University of Electric Power, Shanghai 200090, China; 2. School of Materials Science and Engineering, Shanghai Jiaotong University, Shanghai, 200240, China)
Abstract: A mobile welding robot was made, the kinematics and dynamics model of the welding mobile robot were established, and a control algorithm to achieve seam tracking of a mobile welding robot was proposed. Based on the dynamics of the mobile welding robot, the theories of sliding mode for robust control were used in the proposed control algorithm, and smooth continuous function was used instead of the traditional switching function to deduce the chattering. The effectiveness of the proposed method is verified by experiments. In the seam tracking process, the robot moves steadily without any obvious chattering.
[1]ZHANG Tao, CHEN Shanben. Optimal posture searching algorithm on mobile welding robot [J]. Journal of Shanghai Jiaotong University(Science), 2014,19(1):8487.[2]陈洪堂, 李海超, 高洪明, 等. 基于人机工程的主从机器人遥控焊接焊缝跟踪误差分析[J]. 焊接学报, 2012,33(5):912.CHEN Hongtang, LI Haichao, GAO Hongming, et al. Error analysis of seam tracking in masterslave robot remote welding based on ergonomics [J]. Transactions of the China Welding Institution, 2012,33(5):912.[3]Aghili F. A prediction and motionplanning scheme for visually guided robotic capturing of freefloating tumbling objects with uncertain dynamics [J]. IEEE Transactions on Robotics,2012,28(3):634649.[4]吕学勤, 张轲, 吴毅雄. 轮式移动焊接机器人输出反馈线性化控制[J]. 机械工程学报,2014,50(6):4854.L Xueqin, ZHANG Ke, WU Yixiong. Control of the wheeled mobile welding robot based on output feedback linearization [J]. Chinese Journal of Mechanical Engineering,2014,50(6):4854.[5]张柯, 吴毅雄, 吕学勤, 等. 差速驱动式移动焊接机器人动力学建模[J]. 机械工程学报,2008,44(11):116120.ZHANG Ke, WU Yixiong, L Xueqin, et al. Dynamic modeling for differentially steered welding mobile robot [J]. Chinese Journal of Mechanical Engineering,2008,44(11):116120.