Vibration Signal Processing of Gear Box Based on Improved Fourier Decomposition
In order to improve the running accuracy of gear box,a fault diagnosis method based on improved Fourier decomposition is designed.A complex non-stationary signal is decomposed into Fourier intrinsic mode functions(FIMF)containing multiple instantaneous frequencies in an adaptive manner.Then,the instantaneous amplitudes and frequencies of each FIMF component are estimated to obtain the energy distribution of the marginal spectrum of the component and the time and frequency of the initial signal.The first IMF envelope spectrum calculated and the first 4 IMF spectra can be seen from the analysis of rotor rubbing signals.The analysis of vibration signals with inner ring faults in rolling bearings shows that the envelope spectrum formed by the FIMF component contains less low-frequency signals.This research can be extended to other transmission fields and has good application value.
vibration signalimproved fourier decompositionfault diagnosistransmission system
NETL
NSTL
万方数据
维普
