Diagnostic systems and methods for predictive condition monitoring
First Claim
1. A monitoring apparatus for diagnosing faults in a system, comprising:
- a reference data store containing failure mode identification data and associated system data sampled from behavior of said system in the failure mode; and
a similarity engine responsive to monitored system data indicative of monitored behavior of said system, for generating at least one similarity value for a comparison of the monitored data to said failure mode associated system data, as a diagnostic indication of said failure mode.
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Abstract
A system for empirically diagnosing a condition of a monitored system. Estimates of monitored parameters from a model of the system provide residual values that can be analyzed for failure mode signature recognition. Residual values can also be tested for alert (non-zero) conditions, and patterns of alerts thus generated are analyzed for failure mode signature patterns. The system employs a similarity operator for signature recognition and also for parameter estimation. Failure modes are empirically determined, and precursor data is automatically analyzed to determine differentiable signatures for failure modes.
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Citations
23 Claims
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1. A monitoring apparatus for diagnosing faults in a system, comprising:
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a reference data store containing failure mode identification data and associated system data sampled from behavior of said system in the failure mode; and
a similarity engine responsive to monitored system data indicative of monitored behavior of said system, for generating at least one similarity value for a comparison of the monitored data to said failure mode associated system data, as a diagnostic indication of said failure mode. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A method for diagnosing faults in a monitored system, comprising the steps of:
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acquiring monitored system data indicative of monitored behavior of said system;
sampling system data from a failure mode to define reference system data associated with said failure mode, and comparing for similarity the monitored system data to said reference system data to generate a similarity value as a diagnostic indication of said failure mode. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17)
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18. A monitoring apparatus for diagnosing faults in a system, comprising:
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a similarity engine responsive to monitored parameter data from said system for generating estimates of the monitored parameter data;
means for differencing the estimates and the monitored data to generate residual data; and
means for recognizing an impending failure mode by comparing for similarity said residual data to reference residual data associated with the failure mode. - View Dependent Claims (19, 20, 21, 22, 23)
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Specification