Patent ID: 6701195
Filing Date: 2004-03-02
Classification: G05B

Abstract:
A method for control of a technical process which generates a plurality of sensor values which are recorded and stored in a sensor data archive, comprising cases generated from recorded sensor data representing a behavior of the technical process; extracting a case from the sensor data archive containing at least a subset of all cases generated previously; generating a new case representing a current state of the technical process for which a prediction is to be made; comparing the new case with previous cases as a basis of prediction for future behavior of the technical process; further comprising recording time-stamped sequences of sensor values and storing this data in the sensor data archive; generating cases representing a time-interval within the data archive for all sensor values which is defined by a case time marking the boundary between a preceding and a consecutive projected period of said time-interval; determining a case similarity value for each previous case to the new case by comparing sensor value sequences of preceding periods of said new case and said previous cases; carrying out case retrieval by ordering previous cases with respect to descending similarity to the new case; synchronizing a case time of a one or more most similar case to a latest recorded sensor value of a new case; and using a projected period of the most similar case as a prediction for the future behavior of the technical process.