Technical note: Gearbox health monitoring through multiresolution Fourier transform of vibration and current signals.

A new signal processing technique; i.e., a corrected multi‐resolution Fourier transform (MFT), is proposed for health monitoring of a multistage gearbox. It is inferred from the study that MFT coefficients of vibration and current signals can predict a consistent trend in the energy level possessed by the gear mesh frequencies with an increase in the severity of defects and, hence, can be useful in gearbox health monitoring.