Gear fault diagnosis of wind turbine generator system based on lifting wavelet- zooming envelope analysis

Aiming at the gearbox fault characteristic of wind turbine generator system, a new synthetical diagnosis method is put forward. In this method, the signal firstly is transformed using lifting wavelet, and the transformation result is analyzed by using FFT, FFT-FS zooming and envelope spectrum. At last, the vibration signals on an experiment platform are tested using this method. The result shows that the method is more effective than traditional methods.