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
G05B23/0224 Process history based detection method, e.g. whereby history implies the availability of large amounts of data
G05B23/024 Quantitative history assessment, e.g. mathematical relationships between available data; Functions therefor; Principal component analysis [PCA]; Partial least square [PLS]; Statistical classifiers, e.g. Bayesian networks, linear regression or correlation analysis; Neural networks