Fault finder expert system
First Claim
1. A device for finding faults in a target system that has a plurality of LRUs, comprising:
- means for receiving input data relating to a state of the target system;
means for storing a probability of failure of individual LRUs of the target system;
means for storing rules, said rules relating conclusions and premises, at least some of said conclusions identifying a faulty LRU;
means for determining a certainty of a conclusion of a stored rule in response to the comparison of the premises of the rule and the input data;
means for ordering the conclusions of the stored rules as a function of both the probability of failure of individual LRUs and the certainties of conclusions of the stored rules; and
means for providing said ordered conclusions to a user via a computer-user interface to thereby indicate a most likely LRU to be a cause of the fault in the target system.
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Accused Products
Abstract
A device for finding faults in a target system that has a plurality of "LRUs", which are the lowest replaceable units in the target system. The fault finding device receives input data relating to a state of the target system, stores a probability of failure of individual LRUs of the target system, and stores rules, these rules relating conclusions and premises, with at least some of the conclusions identifying a faulty LRU. The device determines a certainty of a conclusion of a stored rule in response to a comparison of the premises of the rule and the input data, and orders the conclusions of the stored rules as a function of both the probability of failure of individual LRUs and the certainties of conclusions of the stored rules.
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Citations
33 Claims
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1. A device for finding faults in a target system that has a plurality of LRUs, comprising:
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means for receiving input data relating to a state of the target system; means for storing a probability of failure of individual LRUs of the target system; means for storing rules, said rules relating conclusions and premises, at least some of said conclusions identifying a faulty LRU; means for determining a certainty of a conclusion of a stored rule in response to the comparison of the premises of the rule and the input data; means for ordering the conclusions of the stored rules as a function of both the probability of failure of individual LRUs and the certainties of conclusions of the stored rules; and means for providing said ordered conclusions to a user via a computer-user interface to thereby indicate a most likely LRU to be a cause of the fault in the target system. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
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18. A method of using a computer for finding faults in a target system that has a plurality of LRUs, comprising:
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the computer receiving input data relating to a state of the target system; storing in a memory of the computer a probability of failure of individual LRUs of the target system; maintaining in the memory of the computer a set of stored rules, said rules relating conclusions and premises, at least some of said conclusions identifying a faulty LRU; the computer comparing the premises of the stored rules and the input data; the computer determining a certainty of a conclusion of the stored rule in response to the comparison of the premises of the rule and the input data; the computer ordering the conclusions of the stored rules as a function of both the probability of failure of individual LRUs and the certainties of conclusions of the stored rules; and the computer providing said ordered conclusions to a user via a computer-user interface to thereby indicate a most likely LRU to be a cause of the fault in the target system. - View Dependent Claims (19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33)
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Specification