4.7 Article

Robust Invariant Manifold-Based Output Voltage-Tracking Controller for DC/DC Boost Power Conversion Systems

Journal

IEEE TRANSACTIONS ON SYSTEMS MAN CYBERNETICS-SYSTEMS
Volume 51, Issue 3, Pages 1582-1589

Publisher

IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/TSMC.2019.2899152

Keywords

Power conversion; Manifolds; Cutoff frequency; Voltage control; Heuristic algorithms; System dynamics; Frequency control; DC; DC boost power conversion system; disturbance observer (DOB); invariant manifold; output voltage control; variable cut-off frequency algorithm

Funding

  1. Basic Science Research Program through the National Research Foundation of Korea (NRF) - Ministry of Education [2018R1A6A1A03026005]
  2. NRF through the Ministry of Science, ICT and Future Planning [NRF-2017R1A1A1A05001325]

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A robust output voltage-tracking algorithm based on a variable invariant manifold was proposed in this paper. The method automatically adjusts the invariant manifold and introduces nonlinear disturbance observers to improve the transient output voltage-tracking performance. The proposed technique was confirmed experimentally with a 3-kW dc/dc boost power conversion system.
In this paper, a robust output voltage-tracking algorithm is proposed for dc/dc boost power conversion systems based on a variable invariant manifold. A systematic multivariable approach, considering not only nonlinearity but also the parametric uncertainties, is used for deriving the control law. The proposed method has two features. First, a variable cut-off frequency algorithm is constructed to automatically adjust the invariant manifold, improving the transient output voltage-tracking performance. Second, nonlinear disturbance observers are introduced to enable the control law to exponentially recover the desirable tracking performance without any offset errors in the variable invariant manifold. The performance of the proposed technique is experimentally confirmed with a 3-kW dc/dc boost power conversion system.

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