G PHYSICS
G05 CONTROLLING; REGULATING
G05B CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
G05B23/00 Testing or monitoring of control systems or parts thereof
G05B23/02 Electric testing or monitoring
G05B23/0205 by means of a monitoring system capable of detecting and responding to faults
G05B23/0218 characterised by the fault detection method dealing with either existing or incipient faults
G05B23/0221 Preprocessing measurements, e.g. data collection rate adjustment; Standardization of measurements; Time series or signal analysis, e.g. frequency analysis or wavelets; Trustworthiness of measurements; Indexes therefor; Measurements using easily measured parameters to estimate parameters difficult to measure; Virtual sensor creation; De-noising; Sensor fusion; Unconventional preprocessing inherently present in specific fault detection methods like PCA-based methods