Fault detection and isolation with analysis of built-in-test results
First Claim
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1. A computer system for detecting and isolating a fault in a helicopter using an analysis of subsystem test results, said computer system comprising:
- a processor; and
a memory including software instructions adapted to cause the computer system to perform the steps of;
receiving a helicopter test result including a first subsystem test result from a first built-in-test in a first weapons replaceable assembly and a second subsystem test result from a-second built-in-test in a second weapons replaceable assembly, wherein the first weapons replaceable assembly is different from the second weapons replaceable assembly;
detecting the fault in the helicopter based on the helicopter test result;
selecting a group of fault combinations based on a system architecture of the helicopter and a representation of an operational characteristic of the helicopter;
evaluating the first subsystem test result and the second subsystem test result at a system level based on the group of fault combinations to determine candidate faults; and
isolating a root cause of the fault from among the candidate faults by performing a reasonableness analysis of the helicopter test result including cross referencing related tests and comparing the first subsystem test result and the second subsystem test result, wherein related tests are predetermined based on the system architecture of the helicopter and the operational characteristic of the helicopter, and wherein the computer system forms a portion of an integrated electronic technical manual.
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Abstract
A method for detecting and isolating faults in a complex system using a meta-analysis of subsystem built-in-test (BIT) results is disclosed. Subsystem BIT results may be combined with each other and with a representation of the complex system architecture and operational characteristics. A meta-analysis of the BIT results of individual modules, for example, commercial-off-the-shelf modules, may provide a diagnostic capability of a higher scope than individual subsystem BIT.
114 Citations
20 Claims
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1. A computer system for detecting and isolating a fault in a helicopter using an analysis of subsystem test results, said computer system comprising:
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a processor; and
a memory including software instructions adapted to cause the computer system to perform the steps of;
receiving a helicopter test result including a first subsystem test result from a first built-in-test in a first weapons replaceable assembly and a second subsystem test result from a-second built-in-test in a second weapons replaceable assembly, wherein the first weapons replaceable assembly is different from the second weapons replaceable assembly;
detecting the fault in the helicopter based on the helicopter test result;
selecting a group of fault combinations based on a system architecture of the helicopter and a representation of an operational characteristic of the helicopter;
evaluating the first subsystem test result and the second subsystem test result at a system level based on the group of fault combinations to determine candidate faults; and
isolating a root cause of the fault from among the candidate faults by performing a reasonableness analysis of the helicopter test result including cross referencing related tests and comparing the first subsystem test result and the second subsystem test result, wherein related tests are predetermined based on the system architecture of the helicopter and the operational characteristic of the helicopter, and wherein the computer system forms a portion of an integrated electronic technical manual. - View Dependent Claims (2, 3)
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4. A computer program product for enabling a computer to detect and isolate a fault in an aircraft using a meta-analysis of built-in-test results, said computer program product comprising:
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software instructions for enabling the computer to perform predetermined operations; and
a computer readable medium bearing the software instructions;
the predetermined operations including the steps of;
receiving an aircraft test result including a first subsystem test result and a second subsystem test result;
detecting the fault in the aircraft based on the aircraft test result;
selecting a group of fault combinations based on an architecture of the aircraft subsystems and a representation of an operational characteristic of the aircraft;
evaluating the first subsystem test result and the second subsystem test result at a system level based on the group of fault combinations to determine candidate faults; and
isolating a root cause of the fault in the aircraft at a system level. - View Dependent Claims (5, 6, 7, 8, 9, 10)
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11. A method for detecting and isolating a fault in a complex system, said method comprising:
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providing a complex system test result including a first subsystem test result and a second subsystem test result;
detecting the fault in the complex system based on the complex system test result; and
isolating a root cause of the fault through a meta-analysis of the first subsystem test results and the second subsystem test result;
wherein the first subsystem test result is from a first built-in-test and the second subsystem test result is from a second built-in-test different from the first built-in-test, and wherein the first subsystem test result is communicated in a first protocol and the second subsystem test result is communicated in a second protocol not designed for compatibility with the first protocol. - View Dependent Claims (12, 13, 14, 16, 17, 18, 19, 20)
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15. The method of 12, wherein related tests are selected based on a system architecture of the complex system and operational characteristics of the complex system.
Specification