Disturbance observer based adaptive fuzzy synchronization controller design for uncertain fractional-order chaotic systems

Autor: Youjun Chen, Feng Wang
Jazyk: angličtina
Rok vydání: 2022
Předmět:
Zdroj: Frontiers in Applied Mathematics and Statistics, Vol 8 (2022)
Druh dokumentu: article
ISSN: 2297-4687
DOI: 10.3389/fams.2022.1019047
Popis: This study premeditated the synchronization of two fractional-order chaotic systems (FOCSs) with uncertainties and external disturbances. We utilized fuzzy logic systems (FLSs) to estimate unknown nonlinearities, and implemented disturbance observers to estimate unknown bounded external disturbances. Then, a robust control term was devised to compensate for the unavoidable approximation error of the fuzzy system. In addition, a sliding mode surface was devised to construct an adaptive fuzzy sliding mode controller (AFSMC) that can guarantee that the synchronization error converges to a small neighborhood of zero. Finally, the validity of the proposed control strategy was verified via a numerical simulation.
Databáze: Directory of Open Access Journals