Design and real-time evaluation of a novel observer-based predefined-time controller for the industrial processes

Ali Soltani Sharif Abadi; Pouya Heidarpoor Dehkordi; Reza Hajiyan; Ryszard Kowalik; Wiktor Wróblewski

doi:10.1016/j.isatra.2024.11.030

Design and real-time evaluation of a novel observer-based predefined-time controller for the industrial processes

ISA Trans. 2025 Jan:156:551-564. doi: 10.1016/j.isatra.2024.11.030. Epub 2024 Nov 19.

Authors

Ali Soltani Sharif Abadi¹, Pouya Heidarpoor Dehkordi², Reza Hajiyan³, Ryszard Kowalik⁴, Wiktor Wróblewski⁵

Affiliations

¹ Institute of Electronic Systems, Faculty of Electronics and Information Technology, Warsaw University of Technology, Warsaw, Poland. Electronic address: [email protected].
² Department of Chemical and Polymer Engineering, Faculty of Engineering, Yazd University, Yazd, Iran. Electronic address: [email protected].
³ Faculty of Mechanical Engineering, Semnan University, Semnan, Iran. Electronic address: [email protected].
⁴ Institute of Electrical Power Engineering, Faculty of Electrical Engineering, Warsaw University of Technology, Warsaw, Poland. Electronic address: [email protected].
⁵ Institute of Electrical Power Engineering, Faculty of Electrical Engineering, Warsaw University of Technology, Warsaw, Poland. Electronic address: [email protected].

PMID: 39616042
DOI: 10.1016/j.isatra.2024.11.030

Abstract

A suitable controller for the Continuous Stirred Tank Reactor (CSTR) plays a crucial role in the reactor's performance. This paper presents a novel observer-based sliding mode controller designed to control the CSTR with high accuracy and a fast response. The stability of the proposed method is analyzed using Lyapunov theory. Five other methods, with fixed-time, finite-time (terminal), and asymptotic stability, are used for comparison. Two scenarios are defined: one with bounded control signals and one with unbounded control signals. A real-time simulator is employed to evaluate the control methods. Four different indices are used to compare the methods. In all indices, the proposed control method demonstrates the best performance, with fast response, accurate tracking and estimation, chatter-free operation, and robust features.

Keywords: CSTR; Chattering-free; Control; Industrial processes; Observer-based; Reactor; SMC.