Fuzzy logic control strategy for submerged arc automatic welding of digital controlling

摘要

A microcomputer control system based on 80C320 and a switching regulation of wire feeder were designed. A correction factor based double model fuzzy logic controller (FLC) was introduced to achieve welding digital and intellectualized control by means of wire feeding speed feedback. The controller has many functions such as keyboard input,light emitting diode (LED) display and real-time intellectualized control of welding process etc.The controlling performance influenced by the coefficient of correction function was discussed .It was concluded by the experiments the relation between the coefficient of correction function and welding quality,when the coefficient of correction function is great,the dynamic character of controller is better,when the coefficient of correction function is small,the sensitivity character of controller is better. Experimental results also show that digital and fuzzy logic control method enable the improvement of appearance of weld and stability of welding process to be achieved in submerged arc automatic welding.