This paper presents a new adaptive cascade temperature control system for jacketed stirred
tank reactors in which multiple products are produced. The adaptive control system consists of
two cascade input−output linearizing controllers and an inversion-based parameter estimator
that estimates the rate of heat production by reactions and the overall jacket−reactor heat-transfer coefficient. Without a need for retuning, it can provide tight temperature control in
highly exothermic, multiproduct, jacketed, stirred-tank reactors in which the reaction rate and
the overall heat-transfer coefficient are unknown and vary significantly. The application and
performance of the adaptive cascade control system are shown and compared with those of a
proportional-integral (PI) cascade control system by an exothermic chemical reactor with varying
overall heat-transfer coefficient. Compared to a PI cascade control system, the adaptive cascade
control system exhibits better performance and is much easier to tune.
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