Device for aiding the locating of failure of a complex system

• US 7,350,106 B2
• Filed: 06/18/2003
• Issued: 03/25/2008
• Est. Priority Date: 06/19/2002
• Status: Active Grant

• Current Assignee: Airbus Helicopters
• Original Assignee: Eurocopter
• Inventors: Longere, Jean-Yves
• Primary Examiner(s): Baderman; Scott
• Assistant Examiner(s): Truong; Loan
• Application Number:
  US10/463,863
• Publication Number:
  US 20040153864A1
• Time in Patent Office: 1,742 Days
• Field of Search: 714/25, 714/37, 714/799
• US Class Current: 714/25
• CPC Class Codes: G06F 11/2257 using expert systems

Abstract

A device for aiding the location of a failure within a complex system may include a database that stores diagnostic aid rules; a detector that detects a failure, if any, of the complex system and provides, upon a failure, information relating to the origin of this failure; and a central unit that determines, for any failure detected, on the basis of the diagnostic aid rules and the failure origination information, the element or elements of the complex system that may have caused the failure. Additionally, the central unit determines the corresponding probability that each element caused the failure for presentation to a user.

Claims

1. A device for aiding the locating of a failure of a complex system comprising a plurality of interlinked elements, which device comprises:

at least one database storing diagnostic aid rules;

a detector that detects a functional failure, if any, of said complex system and provides, upon detection of said failure, information relating to the origin of said failure;

a central unit that determines, for any said failure detected, at least on the basis of said diagnostic aid rules stored in said database and of the information provided by said detector, the element or elements of the complex system which are at the origin of said failure, as well as for each element thus determined the corresponding probability that it is at the origin of said failure;

a presentation section that presents to an operator, for any said failure, the element or elements determined as being at the origin of the failure together with on each occasion the corresponding probability; and

an updating section that updates the database under the control of an operator, wherein;

said central unit determines, for an element at the origin of said failure, the corresponding probability with the aid of the ratio of the sum of the failure rates of all the failures covered by a test in said element to the sum of the failure rates of all the failures covered by this test in the entire complex system.

2. The device as claimed in claim 1, wherein said database stores at least some of the following rules:

reliability data relating to various elements of said complex system;

pre-established diagnostics that directly associate a failure locating result with the result of at least one particular test, implemented by the detector; and

selection rules which are imposed on the central unit.

3. The device as claimed in claim 1, wherein said detector comprises a test section that is integrated into said complex system.

4. The device as claimed in claim 1, wherein said detector comprises at least one interactive test section.

5. The device of claim 1, wherein said detector comprises at least one input section that allows an operator to input information relating to (i) said failure and (ii) origin of said failure into said device.

6. The device as claimed in claim 1, wherein said central unit determines the element or elements at the origin of said failure together with on each occasion the corresponding probability, by using at least one pre-established diagnostic.

7. The device as claimed in claim 1, which furthermore comprises a recorder that records, upon the detection of said failure, operational parameters available on the complex system, and wherein said central unit also uses said operational parameters to determine the element or elements at the origin of the failure, as well as the corresponding probability.

8. The device as claimed in claim 1, wherein said presentation section presents on a readable support, at least one of the following presentations:

a list of elements of the complex system together with the associated probability of being at the origin of said failure;

an illustration of the various probabilities according to a set of different colors; and

a schematic diagram of the complex system together with a portrayal of the probability of various elements thereof.

9. The device as claimed in claim 8, wherein said presentation section presents, on said readable support, complementary information relating to failure location.

10. The device as claimed in claim 1, which furthermore comprises a dialog section that allows an operator to undertake a dialog with said device.

11. The device as claimed in claim 1, which furthermore comprises a storage section that stores the information emanating from the detector.

12. The device as claimed in claim 1, which furthermore comprises a storage section that stores auxiliary information which for being presented to an operator by said presentation section.

13. The device as claimed in claim 1, which furthermore comprises a ranking section that chronologically ranks the results emanating from the central unit.

14. A complex system, which comprises a device for aiding failure location, such as that specified under claim 1.

15. A device for aiding the locating of a failure of a complex system comprising a plurality of interlinked elements, which device comprises:

at least one database storing diagnostic aid rules;

a detector that detects a functional failure, if any, of said complex system and provides, upon detection of said failure, information relating to the origin of said failure;

a central unit that determines, for any said failure detected, at least on the basis of said diagnostic aid rules stored in said database and of the information provided by said detector, the element or elements of the complex system which are at the origin of said failure, as well as for each element thus determined the corresponding probability that it is at the origin of said failure;

a presentation section that presents to an operator, for any said failure, the element or elements determined as being at the origin of the failure together with on each occasion the corresponding probability; and

an updating section that updates the database under the control of an operator, wherein;

said central unit determines, for an element C at the origin of said failure, the corresponding probability with the aid of the ratio Σ

C/Σ

total, in which;

Σ

C is a sum characteristic of the element C and corresponds to the sum of the failure products of the various components of said element C;

the failure product of a particular component corresponds to the product of result parameters of various tests monitoring the element of which said particular component forms part, the result parameter of a test being equal;

to 1, if the test does not monitor this component;

to 0, if the test monitors this component, but does not detect any fault;

to the failure rate of said component, if the test monitors this component and detects a fault; and

Σ

total corresponds to the sum of the various sums characteristic of all the elements of the complex system which are monitored by these tests.

16. The device as claimed in claim 15, wherein said database stores at least some of the following rules:

reliability data relating to various elements of said complex system;

pre-established diagnostics that directly associate a failure locating result with the result of at least one particular test, implemented by the detector; and

selection rules which are imposed on the central unit.

17. The device as claimed in claim 15, wherein said detector comprises a test section that is integrated into said complex system.

18. The device as claimed in claim 15, wherein said detector comprises at least one interactive test section.

19. The device of claim 15, wherein said detector comprises at least one input section that allows an operator to input information relating to (i) said failure and (ii) origin of said failure into said device.

20. The device as claimed in claim 15, wherein said central unit determines the element or elements at the origin of said failure together with on each occasion the corresponding probability, by using at least one pre-established diagnostic.

21. The device as claimed in claim 15, which furthermore comprises a recorder that records, upon the detection of said failure, operational parameters available on the complex system, and wherein said central unit also uses said operational parameters to determine the element or elements at the origin of the failure, as well as the corresponding probability.

22. The device as claimed in claim 15, wherein said presentation section presents on a readable support, at least one of the following presentations:

a list of elements of the complex system together with the associated probability of being at the origin of said failure;

an illustration of the various probabilities according to a set of different colors; and

a schematic diagram of the complex system together with a portrayal of the probability of various elements thereof.

23. The device as claimed in claim 22, wherein said presentation section presents, on said readable support, complementary information relating to failure location.

24. The device as claimed in claim 15, which furthermore comprises a dialog section that allows an operator to undertake a dialog with said device.

25. The device as claimed in claim 15, which furthermore comprises a storage section that stores the information emanating from the detector.

26. The device as claimed in claim 15, which furthermore comprises a storage section that stores auxiliary information which for being presented to an operator by said presentation section.

27. The device as claimed in claim 15, which furthermore comprises a ranking section that chronologically ranks the results emanating from the central unit.

28. A complex system, which comprises a device for aiding failure location, such as that specified under claim 15.