Patent ID: 6714899
Filing Date: 2004-03-30
Classification: G05B

Abstract:
A method of controlling a system in accordance with an objective function J, the operation of said system being describable by an equation &Dgr;y=G&Dgr;u, where y represents one or more system-controlled output variables, u represents one or more system-manipulated input variables, G represents system gain parameters, and where J is a function of G, said method comprising the steps of:(a) modeling said system according to an equation &Dgr;y={tilde over (G)}&Dgr;u, where {tilde over (G)} is a nominal estimate of G and has a known uncertainty description and where {tilde over (J)} is said objective function J applied to {tilde over (G)}; (b) computing steady-state targets for said system-manipulated variables u including extremizing said objective function J cast as a quadratic program, such that all of said system-controlled variables will remain feasible at steady-state for all possible values of the system parameters within said known uncertainty description; and (c) using the computed steady-state targets for system-manipulated variables u to control the system.