US 12,339,653 B2
Method for processing flight data
Nicolas Chrysanthos, Moissy-Cramayel (FR); Fabrice Ferrand, Moissy-Cramayel (FR); and Pierre Jean Emile Beauseroy, Moissy-Cramayel (FR)
Assigned to SAFRAN ELECTRONICS & DEFENSE, Paris (FR); and UNIVERSITE DE TECHNOLOGIE DE COMPIEGNE, Compiegne (FR)
Appl. No. 17/914,164
Filed by SAFRAN ELECTRONICS & DEFENSE, Paris (FR); and UNIVERSITE DE TECHNOLOGIE DE TROYES, Troyes (FR)
PCT Filed Mar. 23, 2021, PCT No. PCT/FR2021/050493
§ 371(c)(1), (2) Date Sep. 23, 2022,
PCT Pub. No. WO2021/191554, PCT Pub. Date Sep. 30, 2021.
Claims priority of application No. 2002968 (FR), filed on Mar. 26, 2020.
Prior Publication US 2023/0127673 A1, Apr. 27, 2023
Int. Cl. G05B 23/02 (2006.01); G06F 18/22 (2023.01); G07C 5/00 (2006.01); G07C 5/08 (2006.01)
CPC G05B 23/0237 (2013.01) [G06F 18/22 (2023.01); G07C 5/008 (2013.01); G07C 5/0808 (2013.01)] 7 Claims
OG exemplary drawing
 
1. A computer implemented method for processing flight data, the computer implemented method comprising:
E1) receiving from a flight data recorder of an aircraft, flight data recorded during at least three flights of at least one aircraft by means of the flight data recorder, the data being grouped by flight in a signature vector of the flight, the components of which correspond to data recorded during said flight of the aircraft, a flight being defined by a signature vector,
E2) obtaining two signature vectors x and y with respective size l and m, l≤m, the two signature vectors corresponding to two different flights among said at least three flights;
E3) determining a similarity matrix D the components D (i,j) of which quantify the proximity between the two flight signature vectors x and y, each component allowing identifying for each element of the signature x an element of the other signature y which is closest, the proximity between two components of the signature vectors x and y being a distance weighted by a mean value of the neighboring components of the similarity matrix,
wherein determining the similarity matrix comprises:
E31) initializing a matrix D having L rows and C columns, L=l+1 and C=m−l+2 columns;
E32) calculating D(1,1)=|x1−y1|2 and for (i,j)(i,j)≠(1,1);
E33) calculating the elements D[i,j]=|xi−yi+j−1|2+A+B;
with

OG Complex Work Unit Math
E4) repeating steps E2) and E3) in order to compare, two by two, all the flight signatures so as to obtain at least three similarity matrices; and
E5) processing said similarity matrices D in order to evaluate the similarity between two flights.