A system includes a processor and a memory system in communication with the processor. The memory system stores instructions that when executed by the processor result in the system being operable to identify a system hazard boundary of a monitored system and a system nuisance boundary of the monito
A system includes a processor and a memory system in communication with the processor. The memory system stores instructions that when executed by the processor result in the system being operable to identify a system hazard boundary of a monitored system and a system nuisance boundary of the monitored system. The system is also operable to determine a must-trip condition based on the system hazard boundary and a must-not-trip condition based on the system nuisance boundary. The system is further operable to output a protection margin for the monitored system based on the system hazard boundary and a difference between the must-trip condition and the must-not-trip condition.
대표청구항▼
1. A system, comprising: a processor;a memory system in communication with the processor, the memory system storing instructions that when executed by the processor result in the system being operable to: identify a system hazard boundary of a monitored system and a system nuisance boundary of the m
1. A system, comprising: a processor;a memory system in communication with the processor, the memory system storing instructions that when executed by the processor result in the system being operable to: identify a system hazard boundary of a monitored system and a system nuisance boundary of the monitored system;determine a must-trip condition based on the system hazard boundary and a must-not-trip condition based on the system nuisance boundary;conduct a tolerance stack-up at the must-trip condition to calculate a first estimation error; andoutput a protection margin for the monitored system based on the system hazard boundary, the first estimation error and a difference between the must-trip condition and the must-not-trip condition; anda monitor of the monitored system, the monitor being configured to receive a monitored input from the monitored system, and, based on the monitored input, trip before the monitored system exceeds the system hazard boundary. 2. The system of claim 1, wherein the system is further operable to calculate a threshold protection limit based on a difference between the must-trip condition and the first estimation error. 3. The system of claim 2, wherein the protection margin for the monitored system comprises a ratio of a difference between the threshold protection limit and a selected threshold divided by the difference between the must-trip condition and the must-not-trip condition. 4. The system of claim 2, wherein the system is further operable to output a nuisance margin for the monitored system based on the system nuisance boundary and the difference between the must-trip condition and the must-not-trip condition. 5. The system of claim 4, wherein the system is further operable to conduct a tolerance stack-up at the must-not-trip condition to calculate a second estimation error. 6. The system of claim 5, wherein the system is further operable to calculate a threshold nuisance limit based on a difference between the must-not-trip condition and the second estimation error. 7. The system of claim 6, wherein the nuisance margin for the monitored system comprises a ratio of a difference between the selected threshold and the threshold nuisance limit divided by the difference between the must-trip condition and the must-not-trip condition. 8. The system of claim 7, wherein the system is further operable to perform a margin check of the selected threshold relative to the threshold protection limit and the selected threshold relative to the threshold nuisance limit. 9. The system of claim 8, wherein the system is further operable to perform a design guidance check to confirm that a ratio of a difference between the selected threshold and the threshold nuisance limit divided by the second estimation error exceeds a minimum value. 10. The system of claim 9, wherein the design guidance check further comprises confirming that a selected confirmation time exceeds a minimum confirmation value. 11. The system of claim 10, wherein the design guidance check further comprises confirming that a difference between the protection margin and the nuisance margin is less than a margin difference threshold. 12. The system of claim 11, wherein a corrective action is initiated based on a determination that one or more of the margin check and the design guidance check are not satisfied. 13. The system of claim 12, wherein the corrective action is one of: a requirements change for the monitored system, a design change to the monitored system, or a reviewed and confirmed deviation. 14. The system of claim 1, wherein the monitored system is a control system of an aircraft. 15. The system of claim 1, wherein the system is further operable to confirm that a selected confirmation time for the monitored system is between a nuisance confirmation time limit and a protection confirmation time limit. 16. The system of claim 1, wherein the system is further operable to record results for multiple monitored systems. 17. A method for performance analysis of a monitor of a monitored system, the method comprising: identifying a system hazard boundary of the monitored system and a system nuisance boundary of the monitored system;determining a must-trip condition based on the system hazard boundary and a must-not-trip condition based on the system nuisance boundary;conducting a tolerance stack-up at the must-trip condition to calculate a first estimation error;outputting a protection margin for the monitored system based on the system hazard boundary, the first estimation error and a difference between the must-trip condition and the must-not-trip condition;receiving, at the monitor of the monitored system, a monitored input from the monitored system; andcausing tripping of the monitor before the monitored system exceeds the system hazard boundary based on the monitored input. 18. The method of claim 17, further comprising: calculating a threshold protection limit based on a difference between the must-trip condition and the first estimation error. 19. The method of claim 18, wherein the protection margin for the monitored system comprises a ratio of a difference between the threshold protection limit and a selected threshold divided by the difference between the must-trip condition and the must-not-trip condition. 20. The method of claim 18, further comprising: outputting a nuisance margin for the monitored system based on the system nuisance boundary and the difference between the must-trip condition and the must-not-trip condition. 21. The method of claim 20, further comprising: conducting a tolerance stack-up at the must-not-trip condition to calculate a second estimation error. 22. The method of claim 21, further comprising: calculating a threshold nuisance limit based on a difference between the must-not-trip condition and the second estimation error. 23. The method of claim 22, wherein the nuisance margin for the monitored system comprises a ratio of a difference between the selected threshold and the threshold nuisance limit divided by the difference between the must-trip condition and the must-not-trip condition. 24. The method of claim 23, further comprising: performing a margin check of the selected threshold relative to the threshold protection limit and the selected threshold relative to the threshold nuisance limit. 25. The method of claim 24, further comprising: performing a design guidance check to confirm that a ratio of a difference between the selected threshold and the threshold nuisance limit divided by the second estimation error exceeds a minimum value. 26. The method of claim 25, wherein the design guidance check further comprises confirming that a selected confirmation time exceeds a minimum confirmation value. 27. The method of claim 26, wherein the design guidance check further comprises confirming that a difference between the protection margin and the nuisance margin is less than a margin difference threshold. 28. The method of claim 27, wherein a corrective action is initiated based on a determination that one or more of the margin check and the design guidance check are not satisfied. 29. The method of claim 28, wherein the corrective action is one of: a requirements change for the monitored system, a design change to the monitored system, or a reviewed and confirmed deviation. 30. The method of claim 17, wherein the monitored system is a control system of an aircraft. 31. The method of claim 17, further comprising: confirming that a selected confirmation time for the monitored system is between a nuisance confirmation time limit and a protection confirmation time limit. 32. The method of claim 17, further comprising: recording results for multiple monitored systems. 33. A computer program product for performance analysis of a monitor of a monitored system, the computer program product comprising a computer readable storage medium having program code embodied therewith, the program code readable/executable by a computer, processor or logic circuit to perform a method comprising: identifying a system hazard boundary of the monitored system and a system nuisance boundary of the monitored system;determining a must-trip condition based on the system hazard boundary and a must-not-trip condition based on the system nuisance boundary;outputting a protection margin for the monitored system based on the system hazard boundary and a difference between the must-trip condition and the must-not-trip condition; andcausing tripping of the monitor before the monitored system exceeds the system hazard boundary based on a monitored input from the monitored system. 34. A system comprising: a processor;a memory system in communication with the processor, the memory system storing instructions that when executed by the processor result in the system being operable to: identify a system hazard boundary of a monitored system and a system nuisance boundary of the monitored system;determine a must-trip condition based on the system hazard boundary and a must-not-trip condition based on the system nuisance boundary;confirm that a selected confirmation time for the monitored system is between a nuisance confirmation time limit and a protection confirmation time limit; andoutput a protection margin for the monitored system based on the system hazard boundary and a difference between the must-trip condition and the must-not-trip condition; anda monitor of the monitored system, the monitor being configured to receive a monitored input from the monitored system, and, based on the monitored input, trip before the monitored system exceeds the system hazard boundary. 35. A method for performance analysis of a monitor of a monitored system, the method comprising: identifying a system hazard boundary of the monitored system and a system nuisance boundary of the monitored system;determining a must-trip condition based on the system hazard boundary and a must-not-trip condition based on the system nuisance boundary;confirming that a selected confirmation time for the monitored system is between a nuisance confirmation time limit and a protection confirmation time limit;outputting a protection margin for the monitored system based on the system hazard boundary and a difference between the must-trip condition and the must-not-trip condition;receiving, at the monitor of the monitored system, a monitored input from the monitored system; andcausing tripping of the monitor before the monitored system exceeds the system hazard boundary based on the monitored input.
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이 특허에 인용된 특허 (3)
Fischer William C. (Monroe CT) Adams Don L. (Fairfield CT) Wright Stuart C. (Milford CT) Verzella David J. (Guilford CT), Aircraft trim actuator shutdown monitor system and method.
Fischer William C. (Monroe CT) Wright Stuart C. (Milford CT) Verzella David J. (Guilford CT), Outer-loop monitor for aircraft automatic flight control system.
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