Enhanced Temperature Control of Continuous Stirred Tank Reactors Using QIO-based 2-DoF PID Controller

Serdar Ekinci; Davut Izci; Mostafa Jabari; Alfian Ma'arif

doi:10.18196/jrc.v6i3.26586

Authors

Serdar Ekinci Istanbul Gedik University
Davut Izci Istanbul Gedik University; Bursa Uludag University; Applied Science Private University
Mostafa Jabari Sahand University of Technology
Alfian Ma'arif Universitas Ahmad Dahlan

DOI:

https://doi.org/10.18196/jrc.v6i3.26586

Keywords:

Two-Degree-of-Freedom (2-DOF) PID Controller, Quadratic Interpolation Optimization, Metaheuristics, Continuous Stirred Tank Reactor, Temperature Control

Abstract

Accurate temperature control of continuous stirred tank reactors (CSTRs) remains a major challenge due to the nonlinear dynamics and inherent time delay of the system. Conventional proportional-integral-derivative (PID) controllers often struggle to maintain optimal performance under such complexities, highlighting the need for more advanced control strategies. In this study, a two-degree-of-freedom (2-DOF) PID controller is designed and optimized using the quadratic interpolation optimization (QIO) to enhance temperature regulation in CSTRs. The proposed approach aims to minimize steady-state error, settling time, and overshoot. To implement this method, the nonlinear model of the CSTR is linearized around a stable operating point, and the controller parameters are tuned by minimizing a composite cost function consisting of normalized overshoot and instantaneous error. Simulation results demonstrate that the QIO-based 2-DOF PID controller significantly outperforms other metaheuristic approaches such as differential evolution, particle swarm optimization, slime mould algorithm, and greater cane rat algorithm. Furthermore, comparisons with recent works reveal substantial improvements in rise time, settling time, and steady-state accuracy.

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