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Abstract: The theory and related algorithm of the nonlinear parameter approximate entropy are introduced. A method for analysing
the stability in short-circuiting transition arc welding is put forward
based on approximate entropy, which can be helpful to select the welding
conditions. With welding variables matched, the current data in
short-circuiting transition arc welding are acquired and the approximate
entropy of current is calculated. Referring to the traditional
theoretical analysis of the best stable arc, the association features
between approximate entropy and stability are studied by comparing value and standard deviation of approximate entropy. The results show that the better welding conditions are characterized by larger approximate entropy and lower standard deviation, and the lowest standard deviation among the better matching welding conditions indicates the best stable arc.
Key words: Approximate entropy Welding conditions Short-circuiting transition Best stable arc
CLC No:
TG115.6
国家自然科学基金资助项目(50375053，50575077). Received 20061218, received in revised form 20070529
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