基于模糊PID的焊枪伺服控制系统研究

Servo control system of welding gun based on fuzzy PID

针对钛及稀有金属真空等离子焊接生产特点和焊接工艺对焊枪位置与速度的高精度要求,提出了基于模糊PID控制策略的焊枪伺服控制系统.该系统由上位计算机、下位PLC、交流伺服控制器、弧压传感器和图像传感器构成,采用模糊PID的控制策略实现对焊枪位置和速度全过程优化控制.系统运行结果表明,采用模糊PID控制算法能够改善焊缝质量,提高焊接生产效率,在钛及稀有金属加工领域具有广泛的应用前景.

The quality control of the welding seam is key to the welding process of titanium and rare metals.The vacuum plasma welding technology of these materials has high requirement to the control accuracy of the position and velocity of welding gun.For this reason,a servo control system of welding gun based on fuzzy PID is presented.This system is composed of host computer,PLC,AC servo controller,arc voltage sensor and image sensor,and fuzzy PID control algorithm is adopted for the control of the position and velocity of welding gun.The operation results of the system shown that it can improve the quality of welding seam and the efficiency of welding production,it will have wide application prospects in the welding field of titanium and rare metals.