Diseño y simulación de esquemas PID lineales y no lineales con acción de reset aplicados a dos procesos químicos no lineales

Abstract

This document presents a study on control systems with reset action, with special emphasis on its design and stability analysis.

The first recognized application of the reset-based control concept is the Clegg integrator (CI) or reset integrator that emerged 60 years ago, with the aim of overcoming the fundamental limitations of linear controllers.

As a means for the study, the analysis, design and simulation of linear PID and nonlinear PID control schemes with reset action applied to two nonlinear chemical processes: a mixing tank that has variable delay and a continuous stirring reactor (CSTR) with Van der Vusse reaction.

Performance is assessed using monitoring and regulation tests, and then compared with each other. Performance has been measured using performance indexes (ISE, ITSE and TVu), performance specifications in the time response (overshoot (𝑀𝑝) and settling time (𝑡𝑠)) and robustness specifications in the frequency domain (gain margin (𝐺𝑚) and phase margin (𝜙𝑚)).

Finally, the document presents the development of a graphical interface (GUI) which provides visual and digestible graphics about the different process variables.