Title: Design, simulation and practical implementation of sliding mode controller based on extended state observer for process control applications

Authors: B.J. Parvat; N.S. Patil; Y.P. Patil

Addresses: Department of Instrumentation and Control Engineering, Maratha Vidya Prasarak Samaj's Karmaveer Adv. Baburao Ganpatrao Thakare College of Engineering, Nashik, Maharashtra – 422013, India ' Department of Instrumentation and Control Engineering, Maratha Vidya Prasarak Samaj's Karmaveer Adv. Baburao Ganpatrao Thakare College of Engineering, Nashik, Maharashtra – 422013, India ' Department of Instrumentation and Control Engineering, Maratha Vidya Prasarak Samaj's Karmaveer Adv. Baburao Ganpatrao Thakare College of Engineering, Nashik, Maharashtra – 422013, India

Abstract: In this paper, sliding mode controller (SMC) is designed from estimated states of an extended state observer (ESO) for process control applications. To design and implement ESO-based SMC, an isothermal continuous stirred tank reactor (CSTR) and Wood-Berry distillation process models are used as nonlinear and multivariable process examples respectively in simulation study. For real-time application, it is designed and practically tested for tank level control system. The results obtained from simulation study and real-time application proves applicability of this controlling method. To show the better performance of ESO-SMC, its comparative analysis was made with some well-known controllers.

Keywords: nonlinear extended state observer; nonlinear process control; sliding mode control; SMC; chatter free SMC; multiple input multiple output process control; MIMO.

DOI: 10.1504/IJSCC.2022.122266

International Journal of Systems, Control and Communications, 2022 Vol.13 No.2, pp.154 - 173

Received: 28 May 2021
Accepted: 28 Jun 2021
Published online: 14 Apr 2022 *

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