EMD Based on Signal Sequence Difference and Its Application in Bearing Fault Diagnosis
With the development of modern digital signal processing technology,on-line condition monitoring and fault early warning of mechanical equipment are realized in engineering practice which prevent the sudden failure of bearing.The article performs differential operation on the signal sequence to reduce the instability and randomness of the original signal sequence,and the empirical mode decomposition is used to decompose the signal sequence to extract the intrinsic mode functions with relatively single frequencies of each order,and then the bearing fault characteristics is extracted by Hilbert transform which verify the effectiveness of this method.
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