Health prognosis for complex system using fault modeling
First Claim
1. A method for determining the state of health of a sub-system in a system, said method comprising:
- collecting fault signature test results;
determining a current state of health value for the sub-system using the fault signature test results;
determining current state of health values of a plurality of components in the sub-system using the fault signature test results;
determining current state of health values for components in the system that cannot use fault signature test results using a first probability model and the current state of health value for the sub-system and the current state of health values of the components determined by the fault signature test results;
determining predicted future state of health values for the components in the sub-system using component aging models;
determining a predicted future state of health values for the sub-system using a second probability model and the future state of health value for the components;
determining if the predicted state of health value of the sub-system is greater than a threshold; and
determining the remaining useful life of the sub-system if the predicted state of health value of the sub-system is less than the threshold.
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Abstract
A system and method for providing component and sub-system state of health prognosis in a complex system using fault models and component aging models. The method includes determining a current state of health value for a sub-system using fault signature test results and determining current state of health values for a plurality of components in the sub-system using the fault signature test results. The method also determines current state of health values for components in the system that cannot use fault signature test results using a first probability model and the current state of health values for the plurality of components. The method determines predicted future state of health values for the components in the sub-system using component aging models and determines a predicted future state of health value for the sub-system using a second probability model and the future state of health values of the components.
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Citations
18 Claims
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1. A method for determining the state of health of a sub-system in a system, said method comprising:
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collecting fault signature test results; determining a current state of health value for the sub-system using the fault signature test results; determining current state of health values of a plurality of components in the sub-system using the fault signature test results; determining current state of health values for components in the system that cannot use fault signature test results using a first probability model and the current state of health value for the sub-system and the current state of health values of the components determined by the fault signature test results; determining predicted future state of health values for the components in the sub-system using component aging models; determining a predicted future state of health values for the sub-system using a second probability model and the future state of health value for the components; determining if the predicted state of health value of the sub-system is greater than a threshold; and determining the remaining useful life of the sub-system if the predicted state of health value of the sub-system is less than the threshold. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A method for determining the state of health of a sub-system in a system, said method comprising:
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determining predicted future state of health values for a plurality of components in the sub-system using component aging models; determining a predicted future state of health value for the sub-system using a probability model and the predicted future state of health values; determining if the predicted state of health value for the sub-system is greater than a threshold; and determining the remaining useful life of the sub-system if the predicted state of health value for the sub-system is less than the threshold. - View Dependent Claims (10, 11, 12, 13)
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14. A system for determining the state of health of a sub-system in a complex system, said system comprising:
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means for collecting fault signature test results; means for determining a current state of health value for the sub-system using the fault signature test results; means for determining current state of health values for a plurality of components in the sub-system using the fault signature test results; means for determining current state of health of values for components in the system that cannot use fault signature tests using a first probability model and the state of health values of the plurality of components; means for predicting future state of health values of the components in the sub-system using component aging models; means for determining a predicted future state of health values for the sub-system using a second probability model and the future state of health values of the components; means for determining if the predicted state of health value for the sub-system is greater than a threshold; and means for determining the remaining useful life of the sub-system if the predicted state of health value of the sub-system is less than the threshold. - View Dependent Claims (15, 16, 17, 18)
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Specification