Ten lectures on wavelets
Gear noise detection: an integrated method using Fourier and wavelet approach
ICOSSSE'07 Proceedings of the 6th WSEAS international conference on System science and simulation in engineering
Nearly real-time monitoring of gearbox vibration signal using DWT
CONTROL'10 Proceedings of the 6th WSEAS international conference on Dynamical systems and control
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The aim of this work is to improve the algorithm proposed for monitoring the reliability test (duration test). In order to improve this task, a new index was developed for studying the Side Bands. In fact each frequency of the spectrum has a specific meaning as well as the Side Bands. They appear when an anomaly occurs (in particular, in this work when an anomaly occurs in the gearbox under study). Several diagrams and considerations when an unexpected event occurs are presented. In the first part it is described the typical frequencies due to the gearbox vibration. In the second part it is illustrated the concept of harmonics, side bands and their meaning. In the third part a new index for monitoring the reliability test is presented. Such an index was designed in order to answer to many questions before the crack exceeds. In fact it gives the opportunity of checking the various aspects of the spectrum of the accelerometer signal. In particular it gives information about the order exceeding the target, so we can find earlier the cause of damage. An alarm starts if a damage on a gear wheel is detected.