Verfahren zur Überwachung eines Fahrzeuggetriebes mit Beschleunigungsaufnehmern, insbesondere für Hubschrauber

摘要

The method includes the steps of: acquiring a signal (s(t)) from an acceleration sensor; calculating the Fourier transform (F(h)) in the frequency domain of the signal (s(t)) to obtain a sequence of samples; acquiring from the sequence of samples a set of samples including samples at the meshing frequency of the gears monitored by the sensor, and samples at the harmonic frequencies of the meshing frequency; calculating the energies associated with the set of samples and the signal; calculating a noise energy parameter (MFP) correlated to the ratio between the energy of the set of samples and the energy of the signal; comparing the noise energy parameter (MFP) with at least one predetermined threshold (TH1); and generating an alarm signal in the event the noise energy parameter (MFP) exceeds the threshold value (TH1).