System for selecting data representing an air parameter, process and computer program relating to the same

1. A system for selecting a datum among a set of data representing an air parameter, the set of data including at least two engine data respectively obtained in two control units by measurement respectively in a zone of two engines of an aircraft and at least two reference data respectively obtained in two processing units by measurement in a zone of a fuselage of the aircraft, the system comprising:

at least one of the control units configured

to verify pairwise agreement of three data of the set of data, and

to select a reference datum among the said three data if the agreement is verified, wherein

at least one of the processing units is configured to

compare the two engine data from at least one of the control units, and

produce a signal resulting from the comparison of the two engine data and to send the resulting signal to at least one of the control units.

2. The selection system according to claim 1 , wherein the at least one control unit is configured

to verify agreement of a reference datum with another datum of the set of data if no pairwise agreement of three data is verified, and

to select a reference datum for which the agreement with another datum is verified.

3. The selection system according to claim 1 or 2 , wherein to verify the agreement of three data, the at least one control unit is configured

to determine if a first reference datum is in agreement with a second reference datum and if the first reference datum is in agreement with an engine datum, and

to select the first reference datum when the first reference datum is in agreement with the second reference datum and the engine datum.

4. The selection system according to claim 3 , wherein to verify the agreement of three data, the at least one control unit is configured

to determine, when the first reference datum is not in agreement with the second reference datum and with the engine datum, if a third reference datum, which may be the same as the first reference datum or the second reference datum, is in agreement respectively with the two engine data, and

to select the third reference datum when the third reference datum is in agreement respectively with the two engine data.

5. The selection system according to claim 4 , wherein to verify the agreement of three data, the at least one control unit is configured

to determine, when the third reference datum is not in agreement respectively with the two engine data, if a reference datum is in agreement respectively with two other reference data, and

to select the reference datum if it is in agreement with the two other reference data.

6. The selection system according to claim 1 , wherein the at least one processing unit is configured to

determine a reference datum as a function of signals measured by an associated sensor, and

compare the determined reference datum with each of the engine data.

7. The selection system according to claim 1 , wherein the at least one control unit is configured to compare one reference datum with another reference datum.

8. An aircraft, comprising:

an engine control system; and

the system according to claim 1 for selecting a datum to be used in the engine control system.

9. A process for selecting one datum among a set of data representative of an air parameter, the set of data including at least two engine data respectively obtained in two control units by measurement respectively in a zone of two engines of an aircraft and at least two reference data respectively obtained in two processing units by measurement in a zone of a fuselage of the aircraft, the process comprising:

comparing the two engine data by at least one of the processing units;

sending a signal resulting from the comparing to at least one of the control units;

verifying pairwise agreement of three data of the set of data; and

selecting, if agreement is verified, a reference datum among the three data.

10. A computer program embodied on a non-transitory medium that when executed by a data processing system, causes the data processing system to perform the process according to claim 9 .