Research on gear crack diagnosis of the planet gear transmission

Abstract

Objected to the planetary gear transmission, research on the fault diagnosis of gear cracks is mainly carried out with method of EEMD decomposition and Envelope demodulation. During the process, EEMD decomposition is used to the experiment data and continuously parameters of the root mean square (RMS) value, peak-to-peak (PtP) value, kurtosis (Kr), and other parameters of the IMF components are computed. According those parameters, the signal is reconstructed and after band-pass filtering the Hilbert transform and the envelope demodulation are carried out. The results showed that the power spectrum information obtained by using the EEMD decomposition and Hilbert transform could effectively response fault characteristics of the gear crack in the planetary transmission. The research is beneficial to the gear meshing fault diagnosis of the planetary transmission quickly and accurately and has a positive engineering value.

Keywords

• cracks
• gears
• fault diagnosis
• band-pass filters
• hilbert transforms
• mean square error methods
• power transmission (mechanical)
• hilbert transform
• response fault characteristics
• planetary transmission
• gear crack diagnosis
• eemd decomposition
• kurtosis
• root mean square value
• peak-to-peak value
• imf components
• band-pass filtering