Computer based method and a system for controlling an industrial process

US6658304B1 · kind B1 · utility

Assignee

• ABB AB · SE

Inventors

• Mats Molander · Hagfors, SE
• Michael Lundh · Landskrona, SE

Key dates

• Filing date: Oct 5, 2000
• Grant date: Dec 2, 2003
• Expiry date: Nov 28, 2021

Classification

• Technology area (CPC G): Physics
• CPC primary: G05B13/048
• WIPO field: Control
• WIPO sector: Instruments

Abstract

A computer based method of controlling an industrial process, including the steps ofmeasuring the values of at least one process variable (y1, y2), andpredicting future deviations of one process variable (y1) with regard to the measured value of said at least one process variable (y1, y2), and providing a control signal (uFB) based on said predictions, and by means of a first control law. The method comprises the further steps ofmeasuring a measurable disturbance (d) in the process,predicting future deviations of said process variable (y1) with regard to said disturbance but without regard to the measured value of said at least one process variable (y1, y2), and providing a control signal (ud) based on said predictions by means of a second control law.