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- 2013-06-02
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Description: Redistribution wavelet scale spectrum for the existence of time and frequency resolution can not be reached when the vibration signal is the best and the existence of large noise energy will reduce the time-frequency distribution readability defects is proposed based on parameter optimization and Singular value decomposition (SVD) to improve spectrum reallocation time-frequency distribution readability scale approach. Firstly, Shan-non entropy method to optimize re-allocation of the time-scale spectral basis functions. Bandwidth product (TBP), to overcome the time and frequency resolution can not achieve the best defect, and then the re-allocation of spectrum SVD scale noise reduce noise interference and improve the readability of time-frequency distribution. Finally, the method and the rolling bearing fault signal simulated signals were analyzed, the results show that the method of time-frequency aggregation better noise immunity stronger, can more effectively identify strong noise ch
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