Cascade control of a CSTR using primary nonlinear controller

Abstract

The paper presents the cascade control design for a continuous stirred tank chemical reactor using primary nonlinear controller. The control is performed in primary and secondary control-loops. The primary controlled output of the reactor is a concentration of a main reaction product. The secondary output is the reactant temperature. A common control input is the coolant flow rate. The controller in the primary control-loop is a nonlinear P-controller, in the secondary control-loop an adaptive controller. The primary controller is derived on the basis of simulated or measured steady-state characteristics of the reactor. The results are verified by control simulations.