基于逆变埋弧焊电源系统的模型参考自适应控制

The Model Reference Adaptive Control Method of Submerged Arc Welding Power Supply System

本文根据已有埋弧焊电源控制系统数学模型,采用模型参考自适应控制方法,控制给定电压、送丝速度两种变量,达到电源电流的恒流特性和弧长稳定性。该控制系统以超稳定性理论,基于Matlab/Simulink平台进行仿真实验,并依据实验结果与PID算法下埋弧焊电源控制系统进行对比。最终结论表明:模型参考自适应控制方法相较于传统PID控制,能够较好地保证电源电流的横流特性和弧长稳定性,进而确保焊接效果。

According to the Mathematical model of control system for submerged arc welding power source, using the model reference adaptive control method to control a given voltage including two kinds of variables wire feeding speed to achieve constant current power supply current characteristic and the stability of arc length. With super stability theory,the control system based on Matlab/Simulink platform and the simulation experiment.And according to the experimental results under submerged arc welding power supply control system with PID algorithm were compared. The conclusion shows that the model reference adaptive control method can well guarantee the power supply current cross flow characteristics and stability of the arc length, and ensure the welding effect compared with the traditional PID control.