Estudio, análisis y simulación de esquemas de control tipo PID, SMC y LQR para reactores químicos tipo CSTR

Abstract

The objective of this project is to study, analyze and compare three different control techniques applied to three continuous stirred tank reactors models by means of the IAE performance index and a graphical interface created through the Simulink-Matlab® and Guide tools -Matlab®. The studied reactors were classified according to their response, thus having a reactor with slow dynamics, other with inverse response and another with several points of operation. For this, the linear models were studied and a linear representation of these systems was obtained in two different forms, an empirical system of first order with delay by means of its reaction curve and one in state variables by means of Taylor series. This project study three different control techniques to be applied for this kind systems, like it is the proportional integral derivative controller (PID), sliding mode control (SMC), and the quadratic linear regulator plus integral part (LQI). For all control systems the corresponding simulations were performed with reference changes, perturbations and modeling errors to compare their performance, considering regulation as the most important task, which is the main objective of control in chemical reactors.