熔滴短路过渡动态过程的数学建模与仿真

众多波形控制方法和波形控制参数的研究与确定迫切需要一种简便、有效的方法。为此，本文提出对此动态过程进行建模，通过计算机仿真研究此过程的思路。论文首先分析CO2气体保护焊熔滴短路过渡动态过程。在此基础上，建立了过程的数学模型。模型包括：电弧弧长变化模型、电弧非线性负载模型和弧焊电源－电弧系统模型。然后将这些数学模型转化成计算机仿真软件MATLAB环境下的Simulink仿真模型，并进行了仿真研究。仿真结果与试验结果的对比表明，所提出的模型建立方法是合理的，建立的模型是实用的；应用MATLAB可对熔滴短路过渡动态过程进行仿真分析。

Mathematical Model and Simulation on Dynamic Process of Droplet Short Circuiting Transfer

It is a difficult task to study the many controll parameters of waveform control method.In order to solve this problem,a methematical model of the droplet short circuiting transfer dynamic process in CO 2 gas shielded arc welding is established.The developed model is converted into Simulink simulation model in software MATLAB and simulation of it is also made.Finally,to prove it,many experiments are conducted.The result indicates that the developed way of model is reasonable and the model is practicable.It also shows that the software MATLAB is a workable tool for the dynamic process of droplet short circuiting transfer.