| 脉冲GTAW焊过程辩识及PID控制 |
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| 引用本文： | 武俊峰,薛雨,王强,陈善本.脉冲GTAW焊过程辩识及PID控制[J].电机与控制学报,2002,6(1):71-73,91. |
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| 作者姓名： | 武俊峰 薛雨 王强 陈善本 |
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| 作者单位： | 1. 哈尔滨理工大学自动化系,黑龙江,哈尔滨,150080
2. 哈尔滨工业大学,材料科学系,黑龙江,哈尔滨,150001 |
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| 基金项目： | 国家自然科学基金资助项目（59635160） |
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| 摘 要： | 针对脉冲GTAW焊溶池动态过程，利用面积法、Laplace变换的极限理法及最小二乘法对焊接速度与溶池背面熔宽模型进行了辩识。结果表明，面积法更适用于熔池动态过程辩识；对辩识所得到的二阶熔池模型进行了PID控制器设计，并针对起焊时的时滞采用Smith预估器予以补偿，实验结果表明，Smith预估器时滞具有很好的补偿效果。
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| 关 键 词： | 脉冲GTAW焊 辩识 PID控制 时滞 焊接自动化 |
| 文章编号： | 1007-449X(2002)01-0071-03 |
Identification of welding process and PID control in pulsed gas tungsten arc welding |
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| WU Jun-feng,XUE Yu,WANG Qiang,CHEN Shan-ben.Identification of welding process and PID control in pulsed gas tungsten arc welding[J].Electric Machines and Control,2002,6(1):71-73,91. |
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| Authors: | WU Jun-feng XUE Yu WANG Qiang CHEN Shan-ben |
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| Abstract: | The welding pool model of dynamic process in pulsed gas tungsten arc is identified by three methods: the area method, Laplace-transformation limit theorem method and least square method. The input of the model is welding speed and the output is backside head width of welding pool. The identification effect of the area method is the best among the three methods. The PID control law is designed for the two-order welding pool model obtained by identification and the Smith predictor is adopted to compensate time-delay at starting-welding. Test shows that the Smith predictor can compensate time-delay well. |
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| Keywords: | pulsed GTAW identification PID control time-delay |
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