基于复Morlet小波的非平稳信号瞬时特征提取

International Conference on Electronic and Mechanical Engineering and Information Technology Pub Date : 1900-01-01 DOI:10.1109/EMEIT.2011.6023298

Huailin Ruan, Jiren Xu

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Instantaneous feature extraction of non-stationary signal based on complex Morlet wavelet

Put forward the method of Instantaneous feature extraction of non-stationary signal based on complex wavelet Morlet. Aiming at the characteristics of non-stationary signal signal, we construct two groups of combination information suitable for feature extraction combining amplitude and phase information which complex wavelet transform provide. The example of linear frequency-modulated signals and application examples of bearing vibration signal show that the model and the method have better antinoise ability, and have higher precision to the Instantaneous feature of non-stationary signal, and it can extract Instantaneous feature of non-stationary signal This method can realize its fast algorithm by Fourier transform, and has the simple and fast characteristics of algorithm, and realize the real-time analysis of the instantaneous characteristics of non-stationary signal

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International Conference on Electronic and Mechanical Engineering and Information Technology

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