Technical testing method

Patent metadata

Field	Value
Publication number	US-10352275-B2
Application number	US-201415034709-A
Country	US
Kind code	B2
Filing date	Oct 30, 2014
Priority date	Nov 5, 2013
Publication date	Jul 16, 2019
Grant date	Jul 16, 2019

Abstract

A field of test methods, and more particularly to a method for testing a device, the method including one operating stage corresponding to a stable value of one operating setpoint for the device and/or for a test bench for testing the device. The operating stage is finalized before a maximum duration threshold if a criterion associated with a set of physical parameters picked up during the operating stage is satisfied and if a confidence level associated with the set of physical parameters reaches at least a predetermined threshold.

First claim

The invention claimed is:

1. A technical test method for testing a propulsion engine, the technical test method comprising:
operating the propulsion engine at an operating stage corresponding to a stable value of at least one operating setpoint for at least one of the propulsion engine and a test bench for testing the propulsion engine; and
picking up a plurality of physical parameters of the propulsion engine, including at least one among temperature, pressure, thrust, and vibration, during the operating the propulsion engine at said operating stage using sensors,
wherein the operating the propulsion engine at said operating stage is finalized before a maximum duration threshold if a criterion associated with the plurality of physical parameters picked up during the operating stage is satisfied and if a confidence level associated with the plurality of physical parameters reaches at least a predetermined threshold, each physical parameter of the plurality of physical parameters being associated with a respective confidence level, and the confidence level associated with the plurality of physical parameters as a whole being a function of the respective confidence levels associated with the plurality of physical parameters, and
wherein said function comprises the product of multiplying together the respective confidence levels associated with two physical parameters of said plurality of physical parameters.

2. The technical test method according to claim 1 , wherein the operating the propulsion engine at said operating stage is finalized prior to a maximum duration threshold if said criterion is satisfied and if said confidence level reaches at least said predetermined threshold for at least a predetermined minimum duration.

3. The technical test method according to claim 1 , wherein said function comprises subtracting said product of multiplying together the respective confidence levels associated with two physical parameters of said plurality of physical parameters from the sum of the same two respective confidence levels.

4. The technical test method according to claim 1 , wherein at least one of the respective confidence levels is predeteimined.

5. The technical test method according to claim 1 , wherein at least one respective confidence level associated with a physical parameter is calculated as a function of a noise level in a signal corresponding to the associated physical parameter.

6. The technical test method according to claim 1 , wherein at least one respective confidence level associated with a physical parameter is calculated as a function of an asymmetric uncertainty coefficient of a signal corresponding to the associated physical parameter.

7. The technical test method according to claim 1 , wherein at least one respective confidence level associated with a physical parameter is calculated as a function of a difference between a value of the associated physical parameter and a predetermined threshold.

8. The technical test method according to claim 1 , wherein each of said respective confidence levels has a value lying in the range 0 to 1.

9. The technical test method according to claim 1 , further comprising:
ordering a sequence of a plurality of different operating stages, each of the operating stages corresponding to a stable value of at least one operating setpoint for at least one of the propulsion engine and the test bench for testing the propulsion engine.

10. The technical test method according to claim 9 , wherein the order of the operating stages in said sequence is established on the basis of at least one priority assigned to each operating stage, and of values for the at least one operating setpoint corresponding to the plurality of operating stages.

11. A technical test method for testing a propulsion engine, the technical test method comprising:
ordering a sequence of a plurality of different operating stages, each of the operating stages corresponding to a stable value of at least one operating setpoint for at least one of the propulsion engine and a test bench for testing the propulsion engine, wherein an order of the operating stages in said sequence is established on the basis of at least one priority assigned to each operating stage, and of values for the at least one operating setpoint corresponding to the plurality of operating stages,
operating the propulsion engine at each operating stage of the plurality of different operating stages; and
picking up a plurality of physical parameters of the propulsion engine, including at least one among temperature, pressure, thrust, and vibration, during the operating the propulsion engine at each operating stage using sensors,
wherein the operating the propulsion engine at each operating stage is finalized before a maximum duration threshold if a criterion associated with the plurality of physical parameters is satisfied and if a confidence level associated with the plurality of physical parameters reaches at least a predetermined threshold, each physical parameter of the plurality of physical parameters being associated with a respective confidence level, and the confidence level associated with the set of physical parameters as a whole being a function of the respective confidence levels associated with said plurality of physical parameters.

12. A non-transitory computer readable medium containing a set of instructions executable by a computer system to perform the technical test method of claim 11 .

13. A technical test method for testing a propulsion engine, the technical test method comprising:
operating the propulsion engine at an operating stage corresponding to a stable value of at least one operating setpoint for at least one of the propulsion engine and a test bench for testing the propulsion engine; and
picking up a plurality of physical parameters of the propulsion engine, including at least one among temperature, pressure, thrust, and vibration, during the operating the propulsion engine at said operating stage using sensors,
wherein the operating the propulsion engine at said operating stage is finalized before a maximum duration threshold if a criterion associated with the plurality of physical parameters picked up during the operating stage is satisfied and if a confidence level associated with the plurality of physical parameters reaches at least a predetermined threshold, each physical parameter of the plurality of physical parameters being associated with a respective confidence level, and the confidence level associated with the set of physical parameters as a whole being a function of the respective confidence levels associated with said plurality of physical parameters, and
wherein at least one of the respective confidence levels is predetermined.

14. A non-transitory computer readable medium containing a set of instructions executable by a computer system to perform the technical test method of claim 13 .

15. A technical test method for testing a propulsion engine, the technical test method comprising:
operating the propulsion engine at an operating stage corresponding to a stable value of at least one operating setpoint for at least one of the propulsion engine and a test bench for testing the propulsion engine; and
picking up a plurality of physical parameters of the propulsion engine, including at least one among temperature, pressure, thrust, and vibration, during the operating the propulsion engine at said operating stage using sensors,
wherein the operating the propulsion engine at said operating stage is finalized before a maximum duration threshold if a criterion associated with the plurality of physical para

Assignees

• Safran Aircraft Engines

Inventors

• Le Gonidec Serge
• Reichstadt Sebastien

Classifications

• F02K9/00

  Rocket-engine plants, i.e. plants carrying both fuel and oxidant therefor; Control thereof · CPC title

• F05D2260/83

  Testing, e.g. methods, components or tools therefor · CPC title

• G01M15/05 Primary

  by combined monitoring of two or more different engine parameters · CPC title

• F02K9/96 Primary

  characterised by specially adapted arrangements for testing or measuring · CPC title

• F04D15/0088

  Testing machines · CPC title