Control of a solution copolymerization reactor using piecewise linear models

Leyla Özkan, Mayuresh V. Kothare, Christos Georgakis

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

This paper presents an implementation of a model predictive control (MPC) algorithm using piecewise linear models on an industrial case study: Solution copolymerization of methylmethacrylate and vinyl acetate. The control algorithm is a receding horizon scheme with a quasi-infinite horizon objective function which has finite and infinite horizon cost components. The finite horizon cost consists of free input variables that direct the system towards a terminal region which contains the desired operating point. The infinite horizon cost has an upper bound and takes the system to the final operating point. The nonlinear system is represented with multiple linear models obtained by Jacobian linearization at points that are chosen along a transient trajectory between two operating points. The control approach was successfully implemented during a transition from one operating point to another. Significant improvement was observed in reducing the transition period, hence the amount of off-specification product produced during the transition period, as the number of linear models was increased to represent the nonlinear system. Furthermore, the proposed approach is extended to incorporate output feedback.

Original languageEnglish (US)
Title of host publicationProceedings of the American Control Conference
Pages3864-3869
Number of pages6
Volume5
DOIs
StatePublished - 2002
Externally publishedYes
Event2002 American Control Conference - Anchorage, AK, United States
Duration: May 8 2002May 10 2002

Other

Other2002 American Control Conference
CountryUnited States
CityAnchorage, AK
Period5/8/025/10/02

ASJC Scopus subject areas

  • Control and Systems Engineering

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