小波包变换在信号处理中的应用
首发时间:2011-07-20
摘要:本文首先介绍了小波包的理论和小波包算法,由于其具有良好的时-频特性,广泛应用于信号处理中。文中给出了两个具体例子来验证小波包变换在信号处理中的应用。实例一主要是小波包用于信号去噪,从结果中可以看出在信号去噪中,小波包变换可以有效地抑制了噪声成分,真实的反应出信号的基本特性。此外,小波包变换在检测负载波动中也有个广泛的应用。从实例二中可以看出,通过小波包变换可以有效的区别出电机是发生转子断条故障还是发生了负载波动。文章最后还指出了小波包的发展前景。
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The applications of WPT in the signal processing
Abstract:This paper firstly introduces the theory of wavelet packet and the algorithm of wavelet packet. Because of its good time-frequency characteristics, it is widely used in signal processing. The paper gives two specific examples to validate the applications of the wavelet packet transform in signal processing. The first one is that wavelet packet is used for signal de-noising, it can be seen from the results that in the signal de-noising the wavelet packet transform can effectively suppress the noise components and response the basic characteristics of the signal. In addition, the wavelet packet transform also has a wide range of applications in the detection of load fluctuations. As can be seen from the second example it can effectively distinguish the motor with the fault of rotor broken bars or the load fluctuations through wavelet packet transform. Finally, the article also pointed out that the prospects of wavelet packet.
Keywords: WPT Signal Processing Signal De-noising
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