【摘要】 依据近似熵的理论和算法,从非线性角度对纯CO2保护气体条件下短路过渡电弧焊的电流信号进行了近似熵分析.通过对不同的送丝速度、给定电压及气体流量下电流信号的近似熵计算和比较,表明近似熵可以作为短路过渡稳定性的评判标准.近似熵越大,波动越小,焊接过程就越稳定.更多还原

【Abstract】 Based on the approximate entropy theory and related algorithm, approximate entropy analysis of current in short-circuiting arc welding in CO₂ shielding gas are performed from the point of view of nonlinear time sequences. Calculation and comparison of approximate entropy of current under different wire-feeding speeds, setting voltages and different gas flow rates show that approximate entropy of current can be taken as a creterion of stability of short-circuiting transfer. The results show that greater approximate entropy and less fluctuation indicate a more stable welding process.更多还原