Application of Optimal Wavelet Packets in Failure Signal Extraction of Rotor Orbit

A method using optimal wavelet packet based on Shannon entropy is proposed to extract failure signal from vibration signal of rotor orbit. In order to get the main block of the original signal, decomposed signals must be arranged according to ‘energy’. Finally, clear orbit can be reconstructed using only the main frequency pieces, and the others discarded. Some examples are given and the result shows this method is efficient.