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Surveillance system and method having parameter estimation and operating mode partitioning

  • US 6,609,036 B1
  • Filed: 06/09/2000
  • Issued: 08/19/2003
  • Est. Priority Date: 06/09/2000
  • Status: Active Grant
First Claim
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1. A surveillance system for monitoring an asset, said system comprising in combination:

  • a) a data acquisition means for acquiring a current set of signals engendered from said asset correlative to asset status;

    b) a digitizing means for digitizing said current set of signals for defining a current set of digitized signals;

    c) a process model array comprised of an array of process submodels, each said process submodel trained with at least one of a plurality of training data subsets partitioned from a unpartitioned training data set for providing training of each submodel and wherein each of said plurality of training data subsets has at least one defined operating mode associated therewith;

    d) an operating mode determination means for determining a current operating mode of said asset as a function of both said current set of digitized signals and said defined operating modes associated with said plurality of training data subsets;

    e) a process model selection means for selecting at least one of said process submodels as a function of said determined current operating mode wherein said selected process submodel is representative of said determined current operating mode of said asset;

    f) a parameter estimation means for producing a set of estimated signal values from said selected process submodel;

    g) a fault detection means for detecting the presence of a fault as a function of said set of estimated signal values from said selected process submodel and said current set of digitized signals;

    h) a communication means for outputting detected faults for providing asset surveillance.

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