Prescribed Performance-Based Switching Tracking Algorithm for DC–DC Buck Power Converter With Nonaffine Input and Stochastic Disturbance

Zhao, Junsheng; Zhang, Bingxin; Hu, Yangzi; Yu, Dengxiu; Sun, Zong-Yao; Chen, C. L. Philip

Abstract

This article explores the tracking issue for dc–dc buck power converter with stochastic disturbance, specifically focusing on how output voltage tracks to a desired voltage in a finite-time when the load changes. Meanwhile, considering unmodeled dynamics and nonaffine inputs, we propose an innovative finite-time fuzzy prescribed performance switching tracking algorithm to achieve tracking goal. For realizing the requirements of performance, the algorithm converts the tracking error to a new state by means of a coordinate transformation via the tangent function. In addition, the universal approximation capacity of the fuzzy-logic system is utilized to estimate the unknown nonlinear term effectively. On this basis, the designed adaptive dynamic event-triggered controller can not only ensure that all the signals for the closed-loop system remain bounded in probability but also guarantee that the tracking error will converge to a predetermined small neighborhood. Meanwhile, different piecewise functions are added into the controller to characterize prescribed performance and avoid singularity problems, respectively. Finally, the effectiveness of the tracking control algorithm is fully demonstrated by the simulations of the dc–dc buck power converter.

Citation

Zhao, J., Zhang, B., Hu, Y., Yu, D., Sun, Z.-Y., & Chen, C. L. P. (online). Prescribed Performance-Based Switching Tracking Algorithm for DC–DC Buck Power Converter With Nonaffine Input and Stochastic Disturbance. IEEE Transactions on Systems, Man and Cybernetics: Systems, https://doi.org/10.1109/tsmc.2024.3515040

• Journal Article Type: Article
• Acceptance Date: Dec 8, 2024
• Online Publication Date: Jan 23, 2025
• Deposit Date: Feb 18, 2025
• Journal: IEEE Transactions on Systems, Man, and Cybernetics: Systems
• Print ISSN: 2168-2216
• Publisher: Institute of Electrical and Electronics Engineers
• Peer Reviewed: Peer Reviewed
• DOI: https://doi.org/10.1109/tsmc.2024.3515040
• Keywords: DC–DC buck power converter, finite-time prescribed performance, fuzzy-logic systems, nonaffine input, switched stochastic systems, unmodeled dynamics
• Public URL: http://researchrepository.napier.ac.uk/Output/4122177