Fuzzy approximation-based fractional-order nonsingular terminal sliding mode controller for DC-DC buck converters

Babes, Badreddine and Mekhilef, Saad and Boutaghane, Amar and Rahmani, Lazhar (2022) Fuzzy approximation-based fractional-order nonsingular terminal sliding mode controller for DC-DC buck converters. IEEE Transactions on Power Electronics, 37 (3). pp. 2749-2760. ISSN 0885-8993, DOI https://doi.org/10.1109/TPEL.2021.3114277.

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This article presents a simple and systematic approach to synthesize a robust adaptive fuzzy fractional-order nonsingular terminal sliding mode controller (AFFO-NTSMC) to improve the output voltage tracking control performance of the dc-dc buck converters. The hybrid control method of fractional-order (FO) calculus and NTSMC are combined to create a FO-NTSMC, in which a new FO nonsingular terminal sliding mode surface is established. The idea behind this strategy is the increased flexibility achieved by FO calculation, improving robustness to disturbances and parameters variations provided by the traditional sliding mode controllers as well as finite time convergence properties of the output voltage error to the equilibrium point during the output load changes, simultaneously. In addition, a fuzzy logic system with online adaptive learning algorithm is designed to provide smooth chattering in switching control signal. The stability of the closed-loop system is carefully demonstrated by Lyapunov's theorem. Experimental measurements from a laboratory prototype are presented to demonstrate the effectiveness of the proposed AFFO-NSTSMC algorithm.

Item Type: Article
Funders: High Impact Research of the Research Center in Industrial Technologies, Ministry of Education, Malaysia [LRGS/1/2019/UKM-UM/01/6/3]
Uncontrolled Keywords: Buck converters; Calculus; Uncertainty; Heuristic algorithms; Voltage control; Convergence; Fuzzy logic; Adaptive fuzzy logic system; Chattering reduction; dc-dc buck converter; Finite time convergence; Fractional-order calculus; Fractional-order nonsingular terminal sliding mode control (FO-NTSMC)
Subjects: T Technology > TA Engineering (General). Civil engineering (General)
T Technology > TK Electrical engineering. Electronics Nuclear engineering
Divisions: Faculty of Engineering > Department of Electrical Engineering
Depositing User: Ms. Juhaida Abd Rahim
Date Deposited: 17 Aug 2022 07:53
Last Modified: 17 Aug 2022 07:53
URI: http://eprints.um.edu.my/id/eprint/32755

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