Diagnostic systems and methods for predictive condition monitoring
OwnerStephan W. Wegerich, Andre Wolosewicz +1inventors
InventorsStephan W. Wegerich, Andre Wolosewicz, R. Matthew Pipke
Life of this patent
Estimating the term…
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.
Claims23
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.
A method for diagnosing faults in a monitored system, comprising the steps of:
- 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.
A monitoring apparatus for diagnosing faults in a system, comprising:
- 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.
Dependencies are inferred from the claim text.