1DOF gain scheduled ph control of CSTR

Abstract

Motivated by the rich dynamics of chemical processes, we present a gain scheduled control strategy for a pH neutralization occurring inside continuously stirred tank reactor built on a linearization of a nonlinear state equation about selected operating points. Firstly, we address the problem of a selection of scheduling variable. Based on this, an extra scheduling mechanism is presented to simulate the behavior of a nonlinear process using a linear model. Specifically, the proposed step aims at extending the region of validity of linearization by introducing a parametrized linear model, which enables to construct linear controller at each point. Finally, the parameters of resulting family of linear controllers are scheduled as functions of the reference variable, resulting in a single scheduling controller. © ECMS Zita Zoltay Paprika, Péter Horák, Kata Váradi,Péter Tamás Zwierczyk, Ágnes Vidovics-Dancs, János Péter Rádics (Editors).