This paper puts forward a vibration signal de-noising method based on LMD and Wavelet De-noise. The method denoises the PFs separated from LMD by wavelet Denoise, and reconstitute the denoised signal. It's effective to denoising diesel engine vibration signal and simulation signal. Compared with wavelet noise reduction method, the method is better at de-noising amplitude & frequency modulated signal de-noising.
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