Method of monitoring a transmission assembly of a vehicle equipp

Details Method of monitoring a transmission assembly of a vehicle equipp Method of monitoring a transmission assembly of a vehicle equipp

1998-07-06

2000-01-25

Eldred, J. Woodrow

Aeronautics and astronautics

Aircraft, heavier-than-air

Helicopter or auto-rotating wing sustained, i.e., gyroplanes

244 1711, 244 60, 244 39, B64C 1134

Patent

active

06016994&

ABSTRACT:
The monitoring method includes the steps of: acquiring a first signal from an acceleration sensor; calculating a transform in the frequency domain of the first signal to obtain an initial sequence of samples, each of the samples having a respective amplitude and a respective frequency; processing the initial sequence of samples to obtain a final sequence of samples; calculating a sixth-order moment of the final sequence of samples; and comparing the sixth-order moment with at least one predetermined threshold to detect any vibrational irregularity in the helicopter transmission assembly.

REFERENCES:
patent: 3699806 (1972-10-01), Weichbrodt
patent: 5210704 (1993-05-01), Husseiny
patent: 5365787 (1994-11-01), Hernandez
patent: 5813292 (1998-09-01), Kish et al.

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