评定CO_2电弧焊电源动特性的统计分析法  

Statistical Analyzing Evaluation Method of Dynamic Characteristic of CO _2 Arc Welding Power Source

作　　者：张晓囡[1] 李俊岳[1] 黄石生[1] 杨运强[1] 李桓[1] 天津[2] 

机构地区：[1]天津大学,天津300072 [2]华南理工大学,广州510641

出　　处：《焊接学报》2001年第3期12-16,共5页Transactions of The China Welding Institution

基　　金：国家自然科学基金资助项目 (5 9975 0 68) ;天津市自然科学基金资助项目 (993 60 2 911)

摘　　要：熔滴短路过渡的CO2 焊 ,其焊接过程的电信号是随机的 ,并且是各种电弧物理现象丰富信息的载体。对于随机信号采用统计分析方法 ,便于把信号化为简缩和容易理解的形式 ,反映整体焊接过程的情况 ,并提取出与实际焊接效果相关的特征信息 ,用明确的图、表表示出来 ,据此可望对电源的动特性进行客观的评定。因此 ,本文阐述了电弧焊统计分析方法的原理 ,进行了CO2 电弧焊电源动特性的试验研究 ,在此基础上 ,研究利用统计分析提取评定弧焊电源动特性的特征信息的方法 ,提取了评定动特性的统计特征信息及其特征向量。研究结果表明 ,当动特性发生变化时 ,统计特征向量中各特征信息的显著性亦按一定的规律变化 ,这为根据各统计特征信息的变化评定弧焊电源的动特性奠定了基础。For the CO 2 welding of dip transfer,the electrical signals of the welding process are not only random,but also the carrier of abundant information of various physical phenomena of arc.For the random signal using the statistical analyzing method is easy to transfer the signal into the compact and accessible format,which can reflect the situation of the whole welding process.Mean while the characteristic information interrelated with the welding result can be extracted out and showed as exact figures and tables,basing on which it is hopeful to objectively evaluate the dynamic characteristic of CO 2 arc welding power source.Therefore,in this paper,the principle of the statistical analyzing method of arc welding is discussed.The experimental research of the dynamic characteristic of CO 2 arc welding power source is carried out.On these bases,an adopting statistical analysis extraction method of the characteristic information for the evaluating dynamic characteristic is studied.The statistical characteristic information and vector for the evaluating dynamic characteristic are extracted at last.The studying results show that when the dynamic characteristic is changing,the markedness of the characteristic information in the statistical characteristic vector also changes according to a definite rule.This result establishes a base for the statistical analyzing evaluation method which can be used to evaluate the dynamic characteristic of the arc welding power source according to the change of the statistical characteristic information.s

关 键 词：弧焊电源 动特性 统计分析 特征信息 特征向量 CO2焊 

分 类 号：TG434.5[金属学及工艺—焊接]