Abstract
This research aims at the retention of the stability of arcs in twin-arc pulsed metal active gas welding process. That is, a correction-factor fuzzy logic controller (FLC) is designed to keep the stability of arcs of twin-arcs pulsed metal active gas welding (MAG) process. In the controller, the peak arc voltage of the master welding power is controlled by the pulse base time with means of feed back of arc voltage. The peak arc voltage of slave welding power is controlled by the wire feeding speed with means of feed back of peak arc voltage. The adjusting fuzzy control rule with correction factor is introduced to design for controlling rule and table, and the FLC is realized in a Look-Up-Table (LUT) method. With the controller, the arc length can be kept stable in welding process. Experimental results are provided to confirm the effectiveness of this approach.
Highlights
Twin-wire Gas metal arc welding (GMAW) welding, as one of the main method of high-efficiency welding, has become hot spot in the welding research domain, and possesses broad application prospects[1,2]
As an intelligent control strategy, fuzzy control have many advantages in the application of arc stability control in the arc welding, such as the needless of mathematical model for controlled plant, easy to establish control law of linguistic variable, has good robustness for nonlinear, time-varying and delay system, so it is suitable for modeling and control of pulsed metal active gas welding (MAG) welding power source
The fuzzy control strategy is introduced to develop the synchronic fuzzy control system of master and slave arc of twin-wire pulsed MAG welding in this paper
Summary
Twin-wire Gas metal arc welding (GMAW) welding, as one of the main method of high-efficiency welding, has become hot spot in the welding research domain, and possesses broad application prospects[1,2]. As an intelligent control strategy, fuzzy control have many advantages in the application of arc stability control in the arc welding, such as the needless of mathematical model for controlled plant, easy to establish control law of linguistic variable, has good robustness for nonlinear, time-varying and delay system, so it is suitable for modeling and control of pulsed MAG welding power source. The fuzzy control strategy is introduced to develop the synchronic fuzzy control system of master and slave arc of twin-wire pulsed MAG welding in this paper. Based on the correction factor, collaborative feedback of peak arc voltage of master and slave arc is adopted to form the fuzzy control strategy. Principle of synchronic fuzzy control of master and slave arc
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