Constrained output feedback control of a multivariable polymerization reactor

Author

Kurtz, Michael J. ; Henson, Michael A.

Author_Institution

Dept. of Chem. Eng., Louisiana State Univ., Baton Rouge, LA, USA

Volume

5

fYear

1997

fDate

4-6 Jun 1997

Firstpage

2950

Abstract

A multivariable, nonlinear control strategy which accounts for unmeasured state variables and input constraints is developed for the free-radical polymerization of methyl methacrylate. Monomer concentration and reactor temperature are controlled using a technique which combines input-output decoupling and linear model predictive control. Input constraints are handled explicitly by applying linear model predictive control to the feedback linearized system. Unmeasured initiator and solvent concentrations are accounted for by treating the live polymer concentration as an unknown parameter which is estimated online. The performance of the control strategy is evaluated through closed-loop simulations

Keywords

chemical technology; constraint theory; feedback; multivariable control systems; nonlinear control systems; parameter estimation; polymerisation; predictive control; process control; temperature control; I/O decoupling; closed-loop simulations; constrained output feedback control; feedback linearized system; free-radical polymerization; input constraints; input-output decoupling; linear model predictive control; methyl methacrylate; monomer concentration; multivariable nonlinear control strategy; multivariable polymerization reactor; reactor temperature; unmeasured initiator concentration; unmeasured solvent concentration; unmeasured state variables; Density measurement; Equations; Feeds; Inductors; Output feedback; Polymers; Predictive models; Solvents; Temperature measurement; Temperature sensors;

fLanguage

English

Publisher

ieee

Conference_Titel

American Control Conference, 1997. Proceedings of the 1997

Conference_Location

Albuquerque, NM

ISSN

0743-1619

Print_ISBN

0-7803-3832-4

Type

conf

DOI

10.1109/ACC.1997.611998

Filename

611998