Study on Vector Wigner-Ville Distribution and Its Application
Hao Wei · Machine Tool & Hydraulics · 2008
When the faults of the large rotary machinery happen or develop,the moving processes of the machinery are obviously transient processes.The usual analysis in time-frequency domain to a single channel can't truly Abstract the information of the processes.The vector Wigner-Ville distribution was brought forward based on the Vector-Spectrum and the Wigner-Ville distribution(WVD).It can fuse the vibration information of the two channels fixed at a section of the rotor and reflect exactly the change of the characteristic in the transient processes.Engineering practice indicates that the vector Wigner-Ville distribution is a new and usable method for rotary machinery fault diagnosis.