Title:
METHOD FOR DETECTING A DEFECT IN AT LEAST ONE GEAR OF AN AIRCRAFT TURBOMACHINE BASED ON A VIBRATORY SIGNAL OF THE GEAR
Document Type and Number:
WIPO Patent Application WO/2023/217724
Kind Code:
A1
Abstract:
The invention relates to a method for detecting a defect (DEF) in at least one gear of an aircraft turbomachine based on a vibratory signal (s(n)) of the gear, each gear having a determined meshing frequency (fc) corresponding to a carrier frequency, the method comprising steps consisting in estimating (E3) a target signal (x(n)) comprising a set of characteristic spectral lines based on a whitened vibratory spectrum (y(n)) obtained from a vibratory signal, the method comprising steps of determining, in the whitened vibratory spectrum (y(n)), a plurality of modulation blocks having a modulation index, each modulation block having a carrier coefficient that is dependent on a predetermined carrier frequency (fc) and on the modulation index and a plurality of modulation coefficients that are symmetric about the carrier coefficient.
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Inventors:
ASSOUMANE AMADOU (FR)
HAWWARI YASMINE (FR)
ABBOUD DANY (FR)
MARNISSI YOSRA (FR)
EL BADAOUI MOHAMMED (FR)
HAWWARI YASMINE (FR)
ABBOUD DANY (FR)
MARNISSI YOSRA (FR)
EL BADAOUI MOHAMMED (FR)
Application Number:
PCT/EP2023/062177
Publication Date:
November 16, 2023
Filing Date:
May 09, 2023
Export Citation:
Assignee:
SAFRAN (FR)
International Classes:
G01H1/00; G01M13/021; G01M13/028
Domestic Patent References:
| WO2017190746A1 | 2017-11-09 |
Foreign References:
| EP2434266A2 | 2012-03-28 | |||
| FR3065803A1 | 2018-11-02 |
Other References:
MARNISSI YOSRA ET AL: "On the Use of Structured Prior Models for Bayesian Compressive Sensing of Modulated Signals", APPLIED SCIENCES, vol. 11, no. 6, 16 March 2021 (2021-03-16), pages 2626, XP093002238, DOI: 10.3390/app11062626
BORGHESANI P. ET AL: "Application of cepstrum pre-whitening for the diagnosis of bearing faults under variable speed conditions", MECHANICAL SYSTEMS AND SIGNAL PROCESSING, vol. 36, no. 2, 1 April 2013 (2013-04-01), AMSTERDAM, NL, pages 370 - 384, XP093046628, ISSN: 0888-3270, DOI: 10.1016/j.ymssp.2012.11.001
BORGHESANI P. ET AL: "Application of cepstrum pre-whitening for the diagnosis of bearing faults under variable speed conditions", MECHANICAL SYSTEMS AND SIGNAL PROCESSING, vol. 36, no. 2, 1 April 2013 (2013-04-01), AMSTERDAM, NL, pages 370 - 384, XP093046628, ISSN: 0888-3270, DOI: 10.1016/j.ymssp.2012.11.001
Attorney, Agent or Firm:
ARGYMA (FR)
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