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  HomeContents of Chinese Journal of Mechanical Engineering (English Edition),2008 No.6INTELLIGENT CONTROL SYSTEM OF PULSED MAG WELDING INVERTER BASED ON DIGITAL SIGNAL PROCESSOR

WU Kaiyuan

HUANG Shisheng

WU Shuifeng

LI Xinglin
School of Mechanical Engineering,
South China University
of Technology,
Guangzhou 510640, China

 

 

INTELLIGENT CONTROL SYSTEM OF
PULSED MAG WELDING INVERTER
BASED ON DIGITAL SIGNAL
PROCESSOR*

 

Abstract: A fuzzy logic intelligent control system of pulsed MAG welding inverter based on digital signal processor (DSP) is proposed to obtain the consistency of arc length in pulsed MAG welding. The proposed control system combines the merits of intelligent control with DSP digital control. The fuzzy logic intelligent control system designed is a typical two-input-single-output structure, and regards the error and the change in error of peak arc voltage as two inputs and the background time as single output. The fuzzy logic intelligent control system is realized in a look-up table (LUT) method by using MATLAB based fuzzy logic toolbox, and the implement of LUT method based on DSP is also discussed. The pulsed MAG welding experimental results demonstrate that the developed fuzzy logic intelligent control system based on DSP has strong arc length controlling ability to accomplish the stable pulsed MAG welding process and controls pulsed MAG welding inverter digitally and intelligently.

Key words: Pulsed MAG welding inverter Arc length control Fuzzy logic intelligent control Digital signal processor (DSP)

DOI: 10.3901/CJME.2008.06.086


* This project is supported by National Natural Science Foundation of China(No.50375054) and China Postdoctoral Science Foundation (No.20060400745). Received March 25, 2008; received in revised form October 27, 2008; accepted October 30, 2008

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Biographical notes

WU Kaiyuan, born in 1978, is currently a postdoctor in School of Mechanical Engineering, South China University of Technology, China. He received his PhD degree from South China University of Technology, China, in 2005. His research interests include DSP, inverter, intelligent control and welding, etc.
Tel:+86-20-83682640; E-mail: wuky@scut.edu.cn

HUANG Shisheng, born in 1938, is currently a professor in School of Mechanical Engineering, South China University of Technology, China. His research interests include inverter and power supply, etc.
Tel:+86-20-87111037; E-mail: sshuang@scut.edu.cn

WU Shuifeng, born in 1986, is currently a master candidate in School of Mechanical Engineering, South China University of Technology, China. His research interests include DSP and inverter, etc.
Tel:+86-20-87114484; E-mail: wushuifeng@163.com

LI Xinglin, born in 1983, is currently a master candidate in School of Mechanical Engineering, South China University of Technology, China. His research interests include DSP and inverter, etc.
Tel:+86-20-87114484; E-mail: xing123@yahoo.com.cn.

References


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