Open AccessApproximate entropy based meso-spray transfer analysis of Al-alloy pulsed metal inert-gas welding under self-adapting control
Author(s) -
Weichao Zhang,
Lijun Yang,
Lü Xiao-Qing
Publication year - 2011
Publication title -
wuli xuebao
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.199
H-Index - 47
ISSN - 1000-3290
DOI - 10.7498/aps.60.020601
Subject(s) - materials science , gas metal arc welding , welding , alloy , inert gas , approximate entropy , mechanics , thermodynamics , entropy (arrow of time) , arc welding , control theory (sociology) , computer science , composite material , physics , control (management) , artificial intelligence
The meso-spray transfer of Al-alloys metal inert-gas (MIG) welding has the advantages of well-adjusting of the length of arc and beautiful appearance of weld due to the characters of droplet transfer. In this study, the self-adapting control which is brought to meet the arc of meso-spray transfer is accessed by analyzing the approximate entropy (ApEn) of the arc voltage on the aspect of non-linear dynamics. Under self-adapting control, the change of ApEn value with the varing metal transfer mode is discussed, which is due to the change of the parameter of process. Under spray transfer, two kinds of ApEn values of the self-adapting control and common pulsed control are compared, and we find that the self-adapting control is fit for meso-spray transfer. The results show that the smaller the value of approximate entropy is, the better the effect of the self-adapting control is.