【摘要】 通过对小波包分析的研究,提出了解决小波包算法频带交错与混叠的改进算法。通过数值仿真,证明该算法可以有效地分析复杂信号各频带的信号和能量。在变压器短路冲击振动信号分析实例中,利用该算法得到的小波包能量特征分析、判定变压器绕组变形,具有较高的灵敏度和准确性。更多还原

【Abstract】 Improved anti-aliasing wavelet packet algorithm was proposed by studying wavelet packet algorithm.Numerical simulation proved that this algorithm could effectively analyze the signal and energy of various bands of complex signal.In the practical case analysis of short-circuit impulse transformer vibration signal,this algorithm was proved to have higher sensitivity and accuracy in analyzing the wavelet packet energy characteristics and judging the transformer winding deformation.更多还原