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Abstract—The use of time-frequency entropy to quantitatively assess the stability of alternating current square wave submerged arc welding process considering the distribution features of arc energy is reported in this paper. Time-frequency entropy is employed to calculate and analyze the current signals under different duty cycle, frequency and welding speed in the submerged arc welding process. It is obtained that the greater time-frequency entropy, the less fluctuations, and the more stable welding process. Experimental results are provided to confirm the effectiveness of this approach. Index Terms—Time-frequency entropy, arc energy, alternating current square wave, submerged arc welding, stability I.
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He et al. (2011) studied this question.
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