Nearly real-time monitoring of gearbox vibration signal using DWT

Gearbox diagnosis is challenging in engineering because the vibration signals from a gearbox are complex. The spectral analysis carried out for monitoring the mechanical transmission has a substantial limitation for realizing a real-time monitoring process. To overcome this shortcoming, it was decided to introduce a nearly real-time technique that, while maintaining a high specificity, is able to provide greater sensitivity for detecting significative variations of vibration signal. That kind of approach, as will be discussed in this paper, should earlier detect dynamical irregularity inside the gearbox. The aim is to perform a nearly real-time monitoring in order to stop the duration test faster than the methods reported in our previous papers.