US 12,345,601 B2
Method and system for determining one or more defects in a rotating machine of an aircraft
Patrice Caule, Moissy-Cramayel (FR); and Alexandre Edet, Moissy-Cramayel (FR)
Assigned to SAFRAN VENTILATION SYSTEMS, Blagnac (FR)
Appl. No. 18/257,223
Filed by SAFRAN VENTILATION SYSTEMS, Blagnac (FR)
PCT Filed Dec. 9, 2021, PCT No. PCT/EP2021/084909
§ 371(c)(1), (2) Date Jun. 13, 2023,
PCT Pub. No. WO2022/128717, PCT Pub. Date Jun. 23, 2022.
Claims priority of application No. 2013249 (FR), filed on Dec. 15, 2020.
Prior Publication US 2024/0027302 A1, Jan. 25, 2024
Int. Cl. G01M 15/14 (2006.01); B64F 5/60 (2017.01)
CPC G01M 15/14 (2013.01) [B64F 5/60 (2017.01)] 12 Claims
OG exemplary drawing
 
1. A method for determining one or more faults of an aircraft rotating machine, the method comprising:
a step of measuring at least one acoustic signal and at least one vibratory signal during a same operating phase of the rotating machine,
a step of transforming the at least one acoustic signal and the at least one vibratory signal into an acoustic frequency spectrum and a vibratory frequency spectrum, respectively, in order to obtain a set of frequency spectra,
a step of determining a set of frequencies of interest in the set of frequency spectra, each frequency of interest belonging to a predetermined frequency range,
a step of forming a base of fault spectra, each fault spectrum of the fault spectra comprising at least one frequency line, the at least one frequency line being obtained by linear combination of the frequencies of interest with predetermined weighting coefficients,
a step of comparing the frequency spectrum with the fault spectrum in order to obtain a score, and
a step of determining the one or more faults of the rotating machine by analyzing the scores obtained.