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Unified Approach for Robust Stability Analysis of Buck Converters with Discrete-Time Sliding Mode Control

Author

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  • Yanmin Wang
  • Yang Ge
  • Ping Zhang
  • Guangxin Duan

Abstract

This paper proposes a novel discrete-time sliding mode (DTSM) control approach to address the robust stability problem of buck converters with multiple disturbances. The contributions lie in the “unified” modelling and controller design. In modelling, all the possible model uncertainties and external disturbances are considered and further classified into two cases. It can also be extended to the situations with individual/several disturbances. While for the controller design, differing from the traditional DTSM based on the nominal model, the disturbances are directly introduced in the process, giving the robust stability condition and four new regulation subranges. It is suitable for both nominal and perturbed systems. Finally, the influences of the sampling time and disturbances on the control performance are investigated. Simulations and experiments confirm the benefits of the unified approach with greater accuracy and wider applications.

Suggested Citation

  • Yanmin Wang & Yang Ge & Ping Zhang & Guangxin Duan, 2021. "Unified Approach for Robust Stability Analysis of Buck Converters with Discrete-Time Sliding Mode Control," Mathematical Problems in Engineering, Hindawi, vol. 2021, pages 1-14, June.
    • Handle: RePEc:hin:jnlmpe:5527047
    DOI: 10.1155/2021/5527047
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    Cited by:

    1. Yanmin Wang & Weiqi Zhang & Yalong Yang & Chen Xue & Shibo Yuan & Hanqing Zhang, 2022. "Adaptive Second-Order Sliding Mode Control of Buck Converters with Multi-Disturbances," Energies, MDPI, vol. 15(14), pages 1-19, July.

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