Title: Design of integral sliding mode control with performance comparison for uncertain TITO process

Authors: Vijaykumar S. Biradar; Gajanan M. Malwatkar

Addresses: Department of Electrical Engineering, NBN Sinhgad College of Engineering, Solapur, Maharashtra, India ' Department of Instrumentation Engineering, Government College of Engineering, Jalgaon, Maharashtra, India

Abstract: In this paper, integral sliding mode control (I-SMC) law is designed and discussed for the two-input two-output (TITO) process. In the first step, the TITO process has been decoupled using ideal decoupler and each of the decoupled subsystem is reduced into first-order-plus-delay-time model. The reduced FOPDT model of each of the decoupled subsystems is extensively used to obtain decentralised sliding reaching laws. The designed I-SMC is used in decentralised fashion with decoupler to achieve the regulation performance of the process. The presented decentralised PID is used for performance comparison, in addition to prevalent methods. In the modified PID method, a second order plus delay time model is obtained by analytical method and the parameters of single-input-single-output decentralised controllers are obtained using reduced SOPDT model. The performance I-SMC method is compared with decentralised PID controllers and other prevalent methods and seems to be suitable for TITO process applications.

Keywords: integral sliding mode control; decoupler; decentralised PID controller; model reduction; performance comparison.

DOI: 10.1504/IJAAC.2024.140534

International Journal of Automation and Control, 2024 Vol.18 No.5, pp.556 - 573

Received: 27 Aug 2021
Accepted: 10 Feb 2022
Published online: 22 Aug 2024 *

Full-text access for editors Full-text access for subscribers Purchase this article Comment on this article