中国物理B ›› 2008, Vol. 17 ›› Issue (3): 865-877.doi: 10.1088/1674-1056/17/3/023

• GENERAL • 上一篇    下一篇

Approximate entropy---a new statistic to quantify arc and welding process stability in short-circuiting gas metal arc welding

曹彪, 向远鹏, 吕小青, 曾敏, 黄石生   

  1. College of Mechanical Engineering, South China University of Technology, Guangzhou 510641, China
  • 收稿日期:2006-12-15 修回日期:2007-09-17 出版日期:2008-03-04 发布日期:2008-03-04
  • 基金资助:
    Project supported by the National Natural Science Foundation of China (Grant Nos 50375053 and 50575077).

Approximate entropy---a new statistic to quantify arc and welding process stability in short-circuiting gas metal arc welding

Cao Biao(曹彪), Xiang Yuan-Peng(向远鹏)†, Lü Xiao-Qing(吕小青),Zeng Min(曾敏), and Huang Shi-Sheng(黄石生)   

  1. College of Mechanical Engineering, South China University of Technology, Guangzhou 510641, China
  • Received:2006-12-15 Revised:2007-09-17 Online:2008-03-04 Published:2008-03-04
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Grant Nos 50375053 and 50575077).

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摘要： Based on the phase state reconstruction of welding current in short-circuiting gas metal arc welding using carbon dioxide as shielding gas, the approximate entropy of welding current as well as its standard deviation has been calculated and analysed to investigate their relation with the stability of electric arc and welding process. The extensive experimental and calculated results show that the approximate entropy of welding current is significantly and positively correlated with arc and welding process stability, whereas its standard deviation is correlated with them negatively. A larger approximate entropy and a smaller standard deviation imply a more stable arc and welding process, and vice versa. As a result, the approximate entropy of welding current promises well in assessing and quantifying the stability of electric arc and welding process in short-circuiting gas metal arc welding.

Abstract: Based on the phase state reconstruction of welding current in short-circuiting gas metal arc welding using carbon dioxide as shielding gas, the approximate entropy of welding current as well as its standard deviation has been calculated and analysed to investigate their relation with the stability of electric arc and welding process. The extensive experimental and calculated results show that the approximate entropy of welding current is significantly and positively correlated with arc and welding process stability, whereas its standard deviation is correlated with them negatively. A larger approximate entropy and a smaller standard deviation imply a more stable arc and welding process, and vice versa. As a result, the approximate entropy of welding current promises well in assessing and quantifying the stability of electric arc and welding process in short-circuiting gas metal arc welding.

Key words: approximate entropy, welding current, arc and welding process stability

中图分类号:  (High-pressure, high-current plasmas)

  • 52.77.Fv
52.25.Kn (Thermodynamics of plasmas)