A hybrid method combining Teager Kaiser energy operator, empirical mode decomposition and minimum entropy deconvolution for monitoring gears damages

摘要

Amplitude demodulation is an essential tool for diagnosing gears faults. The quality of the demodulation determines the efficiency of the spectrum analysis in detecting the defect. A signal analysis technique combining minimum entropy deconvolution (MED), empirical mode decomposition (EMD) and Teager Kaiser energy operator (TKEO) is presented. The proposed method consists in enhancing the vibratory signal by using MED, decomposing this signal in intrinsic mode functions (IMF) and selects only the IMF which presents the highest correlation coefficient with the original signal. After that, TKEO is used to track the modulation energy. The spectrum is applied to the instantaneous amplitude. The simulation and experimental results show that an envelope spectrum analysis based on MED-EMD and TKEO provides a consistent signal analysis tool.