Study on Denoising of Vibration Signals Based on Improved DT-CWPT

Preprocessing the collected vibration signal is an important link in the analysis of vibration signal,which will directly affect the final result. This paper presents a method for denoising vibration signal, which uses the modified dual-tree complex wavelet packet transform (DT-CWT) to decompose and reconstruct the signals. It is an improvement of wavelet packet transform and can be used for denoising better. By compose the experimental data, it can be found that the proposed method can effectively reduce the noise of vibration signal and achieve the expected effect.