基于网络的弧长控制系统  

Arc length control system based on the network

作　　者：董明宇[1] 纪文刚[1] 王志俊[1] 

机构地区：[1]北京石油化工学院,北京102617

出　　处：《工业仪表与自动化装置》2015年第1期27-30,34,共5页Industrial Instrumentation & Automation

摘　　要：焊接弧长是影响焊接质量的关键因素,尤其在管道焊接中,管道的椭圆性及轨道的形变引起弧长的变化,进而影响焊接的稳定性。通过建立焊接电源和伺服控制系统的数学模型,采用焊接电流为主控参数、焊枪高低机构位移为副控参数的串级控制策略,利用实时采集的焊接电流,驱动焊枪高低机构伺服运动,调节焊枪高低位置,确保焊接弧长的稳定,进而保证焊接电流的稳定。实验证明系统具有较强的鲁棒性,仿真结果表明系统具有较好的动态特性和静态特性,满足弧长稳定的焊接要求。The arc length is a key factor influencing the quality of welding,especially in pipe welding. Arc length changes with the elliptic of pipe and the deformation of orbit,thereby affects the stability of welding. By establishing the mathematical model of welding power supply and the servo control system,the welding current as the main control parameter and the welding torch height mechanism displacement as deputy control parameter are adopted in the cascade control strategy. the real- time acquisition of welding current is used to drive the torch height mechanism servo motion,adjust the position of the torch height,and ensure the welding arc length,thereby ensure the welding current stable. Experiments prove that system has strong robustness. Simulation results show that the system has good dynamic and static characteristics,and the requirements of the welding arc stability is fulfilled.

关 键 词：弧长控制 焊接平台 数据采集 数据分析 

分 类 号：TP273[自动化与计算机技术—检测技术与自动化装置]