Patent ID: 6625569
Filing Date: 2003-09-23
Classification: G05B,G06F,G06K

Abstract:
A method for diagnosis and prognosis of faults in a physical system comprising:providing sensor data representative of measurements made on the physical system, the measurements being representative of values of signals produced by the physical system; producing model enhanced sensor signals by fitting the sensor data to at least a partial physical model of the physical system; identifying correlated signals from among the sensor data; comparing the correlated signals with expected correlated signals to detect one or more occurrences of events, the expected correlated signals representative of known operating conditions of the physical system; providing discrete data representative of system status variables and system command information; detecting discrepancies among the discrete data; identifying the one or more occurrences of events as unmodeled events based at least on the model enhanced sensor signals; and verifying faults based on the discrepancies among the discrete data.