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Korean Mathematical Society JKMS

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J. Korean Math. Soc. 2012; 49(3): 641-658

Printed May 1, 2012

https://doi.org/10.4134/JKMS.2012.49.3.641

Copyright © The Korean Mathematical Society.

Observer-based input-output linearization control of a multivariable continuous chemical reactor

Bouhamida Mohamed, Daaou Bachir, Mansouri Abdellah, and Chenafa Mohammed

University of Science and Technology, Laboratory of Automatics and Systems Analysis (L.A.A.S), Laboratory of Automatics and Systems Analysis (L.A.A.S), Laboratory of Automatics and Systems Analysis (L.A.A.S)

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The goal of this paper is to develop a nonlinear observer-based control strategy for a multi-variables continuous stirred tank reactor (CSTR). A new robust nonlinear observer is constructed to estimate the whole process state variables. The observer is coupled with a nonlinear controller, designed based on the input-output linearization for controlling the concentration and reactor temperature. The closed loop system is shown to be globally asymptotically stable based on Lyapunov arguments. Finally, computer simulations are developed for showing the performance of the proposed controller.

Keywords: non-linear observer, feedback linearizing controller, global stability, chemical reactor

MSC numbers: 93C83

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