In view of the deficiencies of the wavelet threshold denoising method for vibration signals with non-uniform noise distribution

an algorithm based on Singular Value Decomposition（SVD） plus wavelet threshold denoising is presented.The matrix with the signal information and non-uniform noises is constructed by the rapture method

and the non-uniform noise is decomposed uniformly into several orthogonal subspaces by SVD.The rebuilt signal in the subspace with the maximal singular value is denoised by the wavelet threshold method.The results show that the proposed method is applicable in the vibration signal extraction under the non-uniform noise interference.Compared with the direct wavelet denoising method

the extracted signals are less distorted with more effective components.