Methods and apparatus for model based diagnostics
First Claim
1. A system for monitoring engine performance, said system comprising:
- an engine model;
a component quality estimator coupled to said engine model; and
a fault detection and isolation classifier coupled to said engine model and to said component quality estimator, said engine component quality estimator generates performance estimates, said model generates virtual parameters based on the performance estimates and engine operating conditions.
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Accused Products
Abstract
Systems and methods for performing module-based diagnostics are described. In an exemplary embodiment, sensor values from an actual engine plant are input to an engine component quality estimator which generates performance estimates of major rotating components. Estimated performance differences are generating by comparing the generated performance estimates to a nominal quality engine. The estimated performance differences, which are indicative of component quality, are continuously updated and input to a real-time model of the engine. The model receives operating conditional data and the quality estimates are used to adjust the nominal values in the model to more closely match the model values to the actual plant. Outputs from the engine model are virtual parameters, such as stall margins, specific fuel consumption, and fan/compressor/turbine efficiencies. The virtual parameters are combined with the sensor values from the actual engine plant in a fault detection and isolation classifier to identify abnormal conditions and/or specific fault classes, and output a diagnosis.
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Citations
16 Claims
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1. A system for monitoring engine performance, said system comprising:
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an engine model; a component quality estimator coupled to said engine model; and a fault detection and isolation classifier coupled to said engine model and to said component quality estimator, said engine component quality estimator generates performance estimates, said model generates virtual parameters based on the performance estimates and engine operating conditions. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A method for monitoring engine performance, said method comprising the steps of:
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supplying engine operating conditions to an engine model; supplying engine sensor values to an engine component quality estimator; generating a fault detection based at least in part on engine model outputs, and at least in part on estimator outputs; and supplying the estimator outputs to the engine model. - View Dependent Claims (12, 13, 14, 15)
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16. A method for monitoring engine performance, said method comprising the steps of:
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generating a reference sensor delta by comparing sensor values with sensor estimates at a first operating point; generating a current sensor delta at a second operating point; generating a sensor delta—
delta by comparing the reference sensor delta to the current sensor delta; andgenerating a fault detection based upon the sensor delta-deltas.
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Specification