Abstract:A method of virtual environment calibration for remote welding based on surface tracking with robot force control is proposed.The force control strategy for surface tracking is based on the transection contour of force sensor coordinate system,and spatial locations of the contact points are measured precisely.The problem of virtual environment calibration for T-pipe part is solved with the direct least square fitting algorithm of elliptic tracking trajectory and the T-pipe part calibration algorithm.Experimental results show that the presented method can realize virtual environment calibration with high precision,and the virtual environment model accuracy can meet the requirements of remote welding contact task with passive compliance.
[1] Kim W S.Virtual reality calibration for telerobotic servicing[A].Proceedings of the IEEE International Conference on Robotics and Automation[C].Piscataway,NJ,USA:IEEE,1994.2769-2775.
[2] 宋月娥.弧焊机器人系统协调运动精度及离线编程标定技术研究[D].哈尔滨:哈尔滨工业大学,2002.
[3] 魏秀权.基于人机交互的机器人遥控焊接虚拟环境标定[D].哈尔滨:哈尔滨工业大学,2005.
[4] Fitzgibbon A,Pilu M,Fisher R B.Direct least square fitting of ellipses[J].IEEE Transactions on Pattern Analysis and Machine Intelligence,1999,21(5):476-480.