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Disturbance Observer-Based Offset-Free Global Tracking Control for Input-Constrained LTI Systems with DC/DC Buck Converter Applications

Author

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  • Kyunghwan Choi

    (Center for Eco-Friendly & Smart Vehicles, Korea Advanced Institute of Science and Technology, Daejeon 34141, Korea)

  • Dong Soo Kim

    (Department of Creative Convergence Engineering, Hanbat National University, Daejeon 34158, Korea)

  • Seok-Kyoon Kim

    (Department of Creative Convergence Engineering, Hanbat National University, Daejeon 34158, Korea)

Abstract

This paper presents an offset-free global tracking control algorithm for the input-constrained plants modeled as controllable and open-loop strictly stable linear time invariant (LTI) systems. The contribution of this study is two-fold: First, a global tracking control law is devised in such a way that it not only leads to offset-free reference tracking but also handles the input constraints using the invariance property of a projection operator embedded in the proposed disturbance observer (DOB). Second, the offset-free tracking property is guaranteed against uncertainties caused by plant-model mismatch using the DOB’s integral action for the state estimation error. Simulation results are given in order to demonstrate the effectiveness of the proposed method by applying it to a DC/DC buck converter.

Suggested Citation

  • Kyunghwan Choi & Dong Soo Kim & Seok-Kyoon Kim, 2020. "Disturbance Observer-Based Offset-Free Global Tracking Control for Input-Constrained LTI Systems with DC/DC Buck Converter Applications," Energies, MDPI, vol. 13(16), pages 1-18, August.
    • Handle: RePEc:gam:jeners:v:13:y:2020:i:16:p:4079-:d:395584
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    References listed on IDEAS

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    4. Yahya Danayiyen & Kyungsuk Lee & Minho Choi & Young Il Lee, 2019. "Model Predictive Control of Uninterruptible Power Supply with Robust Disturbance Observer," Energies, MDPI, vol. 12(15), pages 1-22, July.
    5. Alessandro Palmieri & Alessandro Rosini & Renato Procopio & Andrea Bonfiglio, 2020. "An MPC-Sliding Mode Cascaded Control Architecture for PV Grid-Feeding Inverters," Energies, MDPI, vol. 13(9), pages 1-17, May.
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    Cited by:

    1. Sung Hyun You & Koo Bonn & Dong Soo Kim & Seok-Kyoon Kim, 2021. "Cascade-Type Pole-Zero Cancellation Output Voltage Regulator for DC/DC Boost Converters," Energies, MDPI, vol. 14(13), pages 1-14, June.
    2. Sun Lim & Seok-Kyoon Kim & Yonghun Kim, 2021. "Active Damping Injection Output Voltage Control with Dynamic Current Cut-Off Frequency for DC/DC Buck Converters," Energies, MDPI, vol. 14(20), pages 1-17, October.

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