Extraction of Pipeline Vibration Feature Information Based on the Combination of EWT and SVD

Abstract

Due to the problem of endpoint effect in the decomposition of hydraulic structure vibration data by EMD (empirical mode decomposition) method and the resultant mode confusion, a method based on EWT (empirical wavelet transform) combined with SVD (singular value decomposition) of hydraulic structure vibration signal noise reduction method. It is verified through engineering examples that the combination of EWT and SVD can effectively filter out high-frequency vibration noise and low-frequency water flow noise, and has superiority in extracting the characteristic information of hydraulic structure vibration signal.