Application of Model-Free Adaptive Control to Impulse TIG Welding

The multi-input single output(MISO) model-free adaptive control method was applied in pulsed TIG welding system.The backside width of weld pool was arrived at the desired value by adjusting welding peak current and wire feeding speed at the same time.Because of using two parameters,the desired value could be got by adjusting only a little value of control variable.This method could not only improve efficiency but also be helpful to the forming of backside width.