【摘要】 针对脉冲MIG焊电源小直径焊丝焊铝时电弧自身调节作用较弱的缺点 ,采取电弧电压反馈的方式 ,选取基值时间Tb 为控制量 ,峰值电弧电压Uf 为被控制量 ,利用MATLAB模糊逻辑工具箱分析和设计了各变量的隶属度函数、模糊控制规则和模糊控制表 ,以查表方式实现了模糊控制 .试验结果表明 ,所设计的模糊控制器有很强的电弧电压调节能力 ,可保证电弧和焊接过程的稳定 .更多还原

【Abstract】 A fuzzy controller, which is realized by Look up Table(LUT) method based on MATLAB Fuzzy Logic Toolbox, was developed to overcome the disadvantages of weak arc voltage self adjusting ability in pulsed MIG welding with small diameter aluminum wire. In this controller, the peak arc voltage, U f, is controlled by the pulse base time, T b, by means of the feedback of arc voltage. The membership functions, fuzzy linguistic control rules and fuzzy linguistic control table of fuzzy controller were also discussed. The results of the experiment demonstrate that the newly developed fuzzy controller has strong arc voltage adjusting ability to obtain the stabilities of arc voltage and welding process.更多还原