Patent ID: 6597959
Filing Date: 2003-07-22
Classification: G05B

Abstract:
A method for controlling an essentially continuous process, comprising at leasttwo sub-processes, by tracking, processing and correcting variables for the product, a production means and/or any process media throughout a process line, wherein; variable values from a first sub-process are measured, samples from the first sub-process are taken and tested or analyzed to determine a variable value; a flow of the first sub-process is divided into imaginary slices, each slice representing a specific volume of the first sub-process flow and that at least some of the measured or sampled variable values are related to the specific slice volume; and any variable value obtained by measurements, sampling, analyzing or testing is processed and any variable value obtained for a specific slice volume is related to that slice volume; characterized in that at least one multivariate model is developed based on the variable values in a multiple of slice volumes from the first sub-process; the multivariate model is combined with a processed variable value, from the first sub-process representing a specific slice volume, a variable value and/or a quality variable for the specific slice volume and/or another slice volume for a subsequent second sub-process is predicted based on the combination of the multivariate model and the processed variable value, and the prediction is used for executing a corrective action on the subsequent second sub-process.