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Model-free adaptive fixed-time prescribed performance control for PEMFC air feeding system based on oxygen excess ratio reconstruction

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Název: Model-free adaptive fixed-time prescribed performance control for PEMFC air feeding system based on oxygen excess ratio reconstruction
Autoři: Omer Abbaker Ahmed Mohammed, Shusheng Xiong, Liu Qingsheng, Meng Kai, Haoping Wang, Abubakar Unguwanrimi Yakubu, Gomaa Haroun Ali Hamid, Ahmed Mohamed Ishag
Zdroj: Scientific Reports, Vol 15, Iss 1, Pp 1-28 (2025)
Informace o vydavateli: Nature Portfolio, 2025.
Rok vydání: 2025
Sbírka: LCC:Medicine
LCC:Science
Témata: PEMFC air-feeding system, Oxygen excess ratio, Ultra-local model, Sliding mode control, Time-varying disturbances, Medicine, Science
Popis: Abstract The polymer electrolyte membrane fuel cells (PEMFCs) systems with unmeasurable variables, output constraints, time-varying disturbances, and uncertain dynamics can hardly be modelled well, such that model-based control strategies become infeasible. Therefore, an ultra-local model (ULM) only utilizing input and output signals of the PEMFC system is innovatively presented. Together with a fixed-time disturbance observer (FxTDO), fixed-time prescribed performance control, and an adaptive technique-based compensator, a novel internal state estimator-based model-free adaptive fixed-time prescribed performance control (MF-AFxTPPC) is naturally developed to estimate and regulate the oxygen excess ratio (OER). Main advantages are presented as follows: (1) The proposed internal state estimator is designed to estimate OER via FxTDO, which is known for its fixed-time convergence and low computational time. (2) The presented ULM algorithm not only reduces the complexity of controller design but also significantly enhances its flexibility and adaptability. (3) The FxTPPC scheme constrains the tracking error and stabilizes the closed-loop system, which is more favorable to practical implementations. (4) The adaptive technique-based compensator can not only compensate for estimation error and mitigate the input chattering but also guarantee the global robustness. Furthermore, the Lyapunov theorem is utilized to analyze the stability of the designed MF-AFxTPPC scheme. Finally, the numerical simulations on a nonlinear PEMFC model with the proposed controller strategy are achieved in a MATLAB/SIMULINK environment, and findings are given to exhibit the robustness and superiority of the presented method.
Druh dokumentu: article
Popis souboru: electronic resource
Jazyk: English
ISSN: 2045-2322
Relation: https://doaj.org/toc/2045-2322
DOI: 10.1038/s41598-025-19802-0
Přístupová URL adresa: https://doaj.org/article/8f75ad521c2e4f6c8652c5775b513b1b
Přístupové číslo: edsdoj.8f75ad521c2e4f6c8652c5775b513b1b
Databáze: Directory of Open Access Journals
Popis
Abstrakt:Abstract The polymer electrolyte membrane fuel cells (PEMFCs) systems with unmeasurable variables, output constraints, time-varying disturbances, and uncertain dynamics can hardly be modelled well, such that model-based control strategies become infeasible. Therefore, an ultra-local model (ULM) only utilizing input and output signals of the PEMFC system is innovatively presented. Together with a fixed-time disturbance observer (FxTDO), fixed-time prescribed performance control, and an adaptive technique-based compensator, a novel internal state estimator-based model-free adaptive fixed-time prescribed performance control (MF-AFxTPPC) is naturally developed to estimate and regulate the oxygen excess ratio (OER). Main advantages are presented as follows: (1) The proposed internal state estimator is designed to estimate OER via FxTDO, which is known for its fixed-time convergence and low computational time. (2) The presented ULM algorithm not only reduces the complexity of controller design but also significantly enhances its flexibility and adaptability. (3) The FxTPPC scheme constrains the tracking error and stabilizes the closed-loop system, which is more favorable to practical implementations. (4) The adaptive technique-based compensator can not only compensate for estimation error and mitigate the input chattering but also guarantee the global robustness. Furthermore, the Lyapunov theorem is utilized to analyze the stability of the designed MF-AFxTPPC scheme. Finally, the numerical simulations on a nonlinear PEMFC model with the proposed controller strategy are achieved in a MATLAB/SIMULINK environment, and findings are given to exhibit the robustness and superiority of the presented method.
ISSN:20452322
DOI:10.1038/s41598-025-19802-0