METHODS AND SYSTEMS FOR COMPUTATION OF PROBABILISTIC LOSS OF FUNCTION FROM FAILURE MODE

• US 20100088538A1
• Filed: 10/02/2008
• Published: 04/08/2010
• Est. Priority Date: 10/02/2008
• Status: Active Grant

• Current Assignee: Honeywell International Inc.
• Original Assignee: Honeywell International Inc.
• Inventors: Barton, Bradley John, Shao, Qingqiu Ginger, Magnuson, Randy, Maewal, Akhilesh, Kolbet, David
• Granted Patent: US 8,095,337 B2
• Time in Patent Office: Days
• US Class Current: 714/1
• CPC Class Codes: G06N 7/01 Probabilistic graphical models, e.g. probabilistic networks

Abstract

A method for determining a probabilistic loss of function of a system includes the steps of determining a plurality of failure mode probabilities, ranking a plurality of functions pertaining to the failure mode probabilities, and identifying a likely function at least substantially lost by the system based at least in part on the plurality of failure mode probabilities and the ranking.

Claims

1. A method for determining a probabilistic loss of function of a system, the method comprising the steps of:

determining a plurality of failure mode probabilities;

ranking a plurality of functions pertaining to the failure mode probabilities; and

identifying a likely function at least substantially lost by the system, based at least in part on the plurality of failure mode probabilities and the ranking.

2. The method of claim 1, further comprising the steps of:

calculating a likelihood that the likely function has been lost by the system, based at least in part on the plurality of failure mode probabilities.

3. The method of claim 2, further comprising the steps of:

identifying one or more additional likely functions at least substantially lost by the system, based at least in part on the plurality of failure mode probabilities and the ranking; and

calculating a plurality of additional likelihoods that the additional likely functions have been lost by the system, based at least in part on the plurality of failure mode probabilities.

4. The method of claim 1, wherein the step of ranking the plurality of functions pertaining to the failure mode probabilities comprises the step of ranking the plurality of functions pertaining to the failure mode probabilities using a subsystem hierarchy and a function hierarchy dependency tree related thereto.

5. The method of claim 1, wherein the step of identifying a likely function at least substantially lost by the system based at least in part on the plurality of failure mode probabilities and the ranking comprises the step of fusing the plurality of failure mode probabilities with the ranking.

6. The method of claim 5, wherein the step of identifying the likely function at least substantially lost by the system comprises the step of fusing the plurality of failure mode probabilities using a probabilistic function with redundancy.

7. The method of claim 1, further comprising the step of:

obtaining operating data pertaining to the system;

wherein the step of determining the plurality of failure mode probabilities comprises the step of determining the plurality of failure mode probabilities based at least in part on the operating data.

8. A program product for determining a probabilistic loss of function of a system, the program product comprising:

a program configured to at least facilitate;

determining a plurality of failure mode probabilities;

ranking a plurality of functions pertaining to the failure mode probabilities; and

identifying a likely function at least substantially lost by the system, based at least in part on the plurality of failure mode probabilities and the ranking; and

a computer-readable signal bearing medium bearing the program.

9. The program product of claim 8, wherein the program is further configured to at least facilitate:

calculating a likelihood that the likely function has been lost by the system, based at least in part on the plurality of failure mode probabilities.

10. The program product of claim 9, wherein the program is further configured to at least facilitate:

identifying one or more additional likely functions at least substantially lost by the system, based at least in part on the plurality of failure mode probabilities and the ranking; and

calculating a plurality of additional likelihoods that the additional likely functions have been lost by the system, based at least in part on the plurality of failure mode probabilities.

11. The program product of claim 8, wherein the program is further configured to at least facilitate ranking the plurality of functions pertaining to the failure mode probabilities using a subsystem hierarchy and a function hierarchy dependency tree related thereto.

12. The program product of claim 8, wherein the program is further configured to at least facilitate identifying a likely function at least substantially lost by the system based at least in part on the plurality of failure mode probabilities and the ranking comprises the step of fusing the plurality of failure mode probabilities with the ranking.

13. The program product of claim 12, wherein the program is further configured to at least facilitate fusing the plurality of failure mode probabilities using a probabilistic function with redundancy.

14. The program product of claim 8, wherein the program is further configured to at least facilitate:

obtaining operating data pertaining to the system; and

determining the plurality of failure mode probabilities based at least in part on the operating data.

15. A computer system for determining a probabilistic loss of function of a system, the computer system comprising:

an interface configured to at least facilitate obtaining operating data for the system; and

a processor coupled to the interface and configured to at least facilitate;

determining a plurality of failure mode probabilities based at least in part on the operating data;

ranking a plurality of functions pertaining to the failure mode probabilities; and

identifying a likely function at least substantially lost by the system, based at least in part on the plurality of failure mode probabilities and the ranking.

16. The computer system of claim 15, wherein the processor is further configured to at least facilitate:

calculating a likelihood that the likely function has been lost by the system, based at least in part on the plurality of failure mode probabilities.

17. The computer system of claim 16, wherein the processor is further configured to at least facilitate:

identifying one or more additional likely functions at least substantially lost by the system, based at least in part on the plurality of failure mode probabilities and the ranking; and

calculating a plurality of additional likelihoods that the additional likely functions have been lost by the system, based at least in part on the plurality of failure mode probabilities.

18. The computer system of claim 15, wherein the processor is further configured to at least facilitate ranking the plurality of functions pertaining to the failure mode probabilities using a subsystem hierarchy and a function hierarchy dependency tree related thereto.

19. The computer system of claim 15, wherein the processor is further configured to at least facilitate identifying a likely function at least substantially lost by the system based at least in part on the plurality of failure mode probabilities and the ranking comprises the step of fusing the plurality of failure mode probabilities with the ranking.

20. The computer system of claim 19, wherein the system is further configured to at least facilitate fusing the plurality of failure mode probabilities using a probabilistic function with redundancy.