IDENTIFYING FAILURES IN AN AEROENGINE
3 Assignments
0 Petitions
Accused Products
Abstract
A method and a system for identifying failures in an aeroengine. The system includes: a mechanism defining a set of standardized indicators representative of operation of the aeroengine; a mechanism constructing an anomaly vector representative of a behavior of the engine as a function of the set of standardized indicators; a mechanism selecting in an event of an anomaly being revealed by the anomaly vector a subset of reference vectors having directions belonging to a determined neighborhood of a direction of the anomaly vector, the subset of reference vectors being selected from a set of reference vectors associated with failures of the aeroengine and determined using criteria established by experts; and a mechanism identifying failures associated with the subset of reference vectors.
-
Citations
30 Claims
-
1-15. -15. (canceled)
-
16. A method of identifying failures in an aeroengine, the method comprising:
-
using sensors to collect time-series measurements from said aeroengine and its environment; using a processor means to calculate from said time-series measurements indicators that are specific to elements of said aeroengine; using the processor means to define from said specific indicators a set of standardized indicators that are representative of an operation of said aeroengine; using the processor means to construct an anomaly vector representative of a behavior of said engine as a function of said set of standardized indicators; using the processor means, in an event of an abnormality being revealed by said anomaly vector, to select a subset of reference vectors having directions belonging to a determined neighborhood of a direction of said anomaly vector, said subset of reference vectors being selected from a set of reference vectors associated with failures of said aeroengine and determined using criteria established by experts; and using the processor means to identify the failures associated with said subset of reference vectors; and wherein the selecting said subset of reference vectors comprises; using the processor means to calculate geodesic distances between a projection of said anomaly vector and projections of said reference vectors on a sphere in a space of dimension equal to a number of indicators in said set of standardized indicators minus a number of linear relationships between the indicators; using the processor means to compare said geodesic distances in pairs; using the processor means to classify the reference vectors in increasing order of their geodesic distances relative to said anomaly vector; and using the processor means to form said subset of reference vectors from first reference vectors having a classification order less than a determined rank. - View Dependent Claims (17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 30)
-
-
27. A system for identifying failures in an aeroengine, the system comprising:
-
sensors for collecting time-series measurements from said aeroengine and its environment; means for calculating from said time-series measurements indicators that are specific to elements of said aeroengine; means for using said specific indicators to define a set of standardized indicators representative of an operation of said aeroengine; means for constructing an anomaly vector representative of a behavior of said engine as a function of said set of standardized indicators; means for selecting in an event of an anomaly being revealed by said anomaly vector a subset of reference vectors having directions belonging to a determined neighborhood of a direction of said anomaly vector, said subset of reference vectors being selected from a set of reference vectors associated with failures of said aeroengine and determined using criteria established by experts; means for identifying the failures associated with said subset of reference vectors; and wherein the means for selecting a subset of reference vectors comprises; means for calculating geodesic distances between a projection of said anomaly vector and projections of said reference vectors on a sphere in a space of dimension equal to a number of indicators of said set of standardized indicators minus a number of linear relationships between said indicators; means for comparing said geodesic distances in pairs; means for classifying the reference vectors in an increasing order of their geodesic distances relative to said anomaly vector; and means for forming said subset of reference vectors from first reference vectors having a classification order less than a determined rank. - View Dependent Claims (28, 29)
-
Specification