One is the improved EMD based on wavelet packet decomposition(WPD),the other is the masking signal method.
一是基于小波包分解的EMD方法,二是添加掩膜信号法。
参考来源 - EMD中存在的问题及解决方法探讨The mixed-frequency phenomenon existed in the result of wavelet packet decomposition is studied.
研究了小波包分解结果中存在的频率混叠现象，提出了一种抗频率混叠的小波包改进算法。
参考来源 - 柴油机智能化故障诊断技术研究Combining wavelet Packet Decomposition with energy spectrum analysis method,it is proposed that the interval wavelet packet which is based on partial-band wavelet packet energy is used to extract the signal feature.
然后结合小波包分析和能量谱分析方法提出了基于频带局部能量的区间小波包特征提取方法。
参考来源 - 装甲车发动机故障诊断系统的研究·2,447,543篇论文数据，部分数据来源于NoteExpress
以上来源于: WordNet
Because the wavelet packet decomposition is very sensitive to signal of the strange point, this characteristics can be used to follow the velocity signal of motor vibration.
小波包分解本身对信号的奇异点十分敏感，此特点可以用来跟踪电机振动速度信号。
According to the method, the energy of different frequency bands after wavelet packet decomposition constitutes the input vectors of support vector machine as feature vectors.
该方法将振动信号小波包分解后的频带能量作为特征向量，输入到由多个支持向量机构成的多故障分类器中进行故障识别和分类。
The characteristic frequency band of the fault can be identified by wavelet packet decomposition and its energy spectrum conveniently, and the quantification analysis are then performed.
应用小波包分解及其能量谱直观地识别出故障的特征频带，并进行了量化分析。
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