Patent ID: 7289857
Filing Date: 2007-10-30
Classification: G05B,Y10S

Abstract:
1. An analysis system for analyzing data from a monitoring system for monitoring at least one characteristic of a dynamic system, said monitoring system providing characteristic data in respect of the dynamic system, the dynamic system having at least one known normal state, the analysis system comprising: first input means for receiving characteristic data from the monitoring system indicative of a state of the dynamic system; second input means for receiving confirmation information from an operator in an event that said operator considers the dynamic system to be in a known normal state, said confirmation information being associated with said characteristic data, and said confirmation information indicating that said operator considers the dynamic system to be in a known normal state; normality modelling means arranged to derive a normality model in response to received characteristic data and confirmation information, the normality model comprising data indicative of one or more known normal states; prediction generating means arranged to predict future characteristic data from data in the normality model; difference function providing means arranged to provide a difference function, said difference function being indicative of an acceptable difference between predicted future characteristic data and received characteristic data; and comparison means arranged to compare predicted future characteristic data with received characteristic data in conjunction with the difference function, and to produce an abnormality signal if the difference between the predicted future characteristic data and the received characteristic data exceeds the difference function.