HYBRID MODEL BASED FAULT DETECTION AND ISOLATION SYSTEM
First Claim
1. Method for detecting faults in a device comprising the steps of:
- receiving a plurality of performance parameters;
applying said plurality of performance parameters to a first model to produce a plurality of estimated performance parameters;
applying said plurality of performance parameters to a second model to produce a plurality of estimated device parameters;
computing a plurality of residuals from said plurality of estimated device parameters;
computing a plurality of distance measuring from said plurality of residuals;
detecting at least one parameter deviation using said plurality of residuals and said plurality of estimated performance parameters; and
setting at least one detection flag if said detected at least one parameter deviation is persistent.
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Accused Products
Abstract
Method for detecting faults in a device comprising the steps of receiving a plurality of performance parameters, applying the plurality of performance parameters to a first model to produce a plurality of estimated performance parameters, applying the plurality of performance parameters to a second model to produce a plurality of estimated device parameters, computing a plurality of residuals from the plurality of estimated device parameters, computing a plurality of distance measuring from the plurality of residuals, detecting at least one parameter deviation using the plurality of residuals and the plurality of estimated performance parameters, and setting at least one detection flag if the detected at least one parameter deviation is persistent.
43 Citations
25 Claims
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1. Method for detecting faults in a device comprising the steps of:
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receiving a plurality of performance parameters; applying said plurality of performance parameters to a first model to produce a plurality of estimated performance parameters; applying said plurality of performance parameters to a second model to produce a plurality of estimated device parameters; computing a plurality of residuals from said plurality of estimated device parameters; computing a plurality of distance measuring from said plurality of residuals; detecting at least one parameter deviation using said plurality of residuals and said plurality of estimated performance parameters; and setting at least one detection flag if said detected at least one parameter deviation is persistent. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. Apparatus for isolating and detecting faults in a device comprising:
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means for receiving a plurality of performance parameters; means for applying said plurality of performance parameters to a first model to produce a plurality of estimated performance parameters; means for applying said plurality of performance parameters to a second model to produce a plurality of estimated device parameters; means for computing a plurality of residuals from said plurality of estimated device parameters; means for computing a plurality of distance measuring from said plurality of residuals; means for detecting at least one parameter deviation using said plurality of residuals and said plurality of estimated performance parameters; and means for setting at least one detection flag if said detected at least one parameter deviation is persistent. - View Dependent Claims (15, 16, 17, 18, 19, 20, 21, 22, 23)
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24. A method for detecting faults in a device, comprising the steps of:
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receiving a plurality of performance parameters; detecting a deviation of at least one of said parameters; determining a persistency of said deviation; and setting at least one detection flag if said deviation is persistent; wherein said determining step uses a short term filter and a long term filter. - View Dependent Claims (25)
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Specification