detection of abnormal events by using a principal component analysis

摘要

A method for detecting abnormal events in a process comprising one or more independent variables and one or more dependent variables, means for measuring values of the one or more dependent and independent variables, and a multivariable predictive control means capable of calculating predicted values of the one or more dependent variables from the measured values of the one or more independent variables, which method comprises calculating residual values for the one or more dependent variables from the difference between the predicted and measured values of the one or more dependent variables, and performing principal component analysis on the residual values. The means for measuring values of the one or more dependent and independent variables and the multivariable predictive control means can be part of a system which also comprises means for calculating residual values for the one or more dependent variables from the difference between the measured and predicted values, and a means for performing principal components analysis on the residual values.