Estimating health parameters or symptoms of a degrading system

Details Estimating health parameters or symptoms of a degrading system Estimating health parameters or symptoms of a degrading system

2011-01-11

2011-01-11

To, Tuan C (Department: 3663)

Data processing: vehicles, navigation, and relative location

Vehicle control, guidance, operation, or indication

With indicator or control of power plant

C702S034000, C702S081000, C702S085000, C701S059000, C701S099000, C701S101000

Reexamination Certificate

active

07869928

ABSTRACT:
The present invention is concerned with the estimation of health parameters p(k) representing symptoms of a slowly degrading system, in particular industrial gas turbines. According to the invention, an estimation of a true health or independent parameter vector at time step k uses the estimation of the true health or parameter vector at a previous time step k−1 as a starting value for the production of a predicted health parameter vector at time step k. Based on the latter and a set of measured values of input variables of an extended model of the system, a prediction of output variables of the model is produced. This predicted model output is compared with measured values of the output variables to yield an error. From this error, a health parameter estimator in turn produces a health parameter estimate as a revision of the predicted health parameters. Preferably, the estimation of a true health or independent parameter vector at time step k includes a generalized process noise representing stochastic uncertainty and/or a-priori knowledge of an evolution of the health parameters.

REFERENCES:
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patent: 1 418 481 (2004-05-01), None

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