Method of monitoring a transmission assembly of a vehicle equipp

Aeronautics and astronautics – Aircraft – heavier-than-air – Helicopter or auto-rotating wing sustained – i.e. – gyroplanes

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244 39, 244 60, 244 1711, 180337, 180338, B64C 1134

Patent

active

060299304

ABSTRACT:
The monitoring method includes the steps of: acquiring a signal from an acceleration sensor; calculating a transform in the frequency domain of the signal to obtain a sequence of samples; acquiring a sample in the sequence of samples; calculating an actual amplitude value of the acquired sample; calculating a relative deviation between the actual amplitude value of the acquired sample and a reference amplitude value; and comparing the relative deviation with at least one predetermined threshold to immediately detect any irregularity in, and so prevent in-flight failure of, the helicopter transmission assembly.

REFERENCES:
patent: 3699806 (1972-10-01), Weichbrodt
patent: 5210704 (1993-05-01), Husseiny
patent: 5365787 (1994-11-01), Hernandez
patent: 5782433 (1998-07-01), Goi et al.

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