denoise signal 信号消噪
This paper briefly expounded the basic theory of wavelets and wavelet packet, and on the basis of using wavelet packet, introduced the general principles in vibration signal denoise.
简要阐述了小波分析、小波包分析的基本原理，并在此基础上介绍了利用小波包给信号去噪的一般原理。
Applying wavelet denoise to improve the test signal, the dynamic characteristic parameters of a overflow valve were obtained by selecting characteristic point of the signal.
此系统应用小波降噪的方法提高测试信号的质量，然后提取信号特征点，得到溢流阀动态特性的各项参数。
The experimental results verified the accuracy and feasibility of the denoise method to process the momentary speed signal for engine misfire detection.
试验结果验证了该方法的可行性，为利用瞬时转速信号检测发动机失火提供了条件。
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