Chemical process sliding mode control Online publication date: Wed, 25-Feb-2009
by Malik Sekher, Mohammed M'Saad, Mondher Farza, O. Gehan
International Journal of Modelling, Identification and Control (IJMIC), Vol. 5, No. 4, 2008
Abstract: The temperature control involved in chemical reactors has proved to be of fundamental importance from product quality and cost points of view. This paper presents a likely sliding mode control approach to deal with the temperature servo problem in exothermic stirred tank batch reactors. Two design features are worth to be emphasised. Firstly, an engineering control design framework is developed in the sliding mode control spirit. This involves a design function satisfying an adequate reachability condition and allows to incorporate a filtered integral action into the design for free offset performance considerations. Secondly, a high gain observer providing an accurate estimation of the reaction heat is used to improve the control performances while monitoring the chemical reactor operation. The control as well as the monitoring features of the proposed approach are illustrated in a realistic simulation framework involving an exothermic stirred tank reactor.
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