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Disturbance Observer Based Decentralized Controller for Disturbance Rejection and Cross-Regulation Mitigation in Single-Inductor Multioutput Buck Converters
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DOI：10.1109/tpel.2026.3695946.png)
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Abstract
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In this work, a controller augmented with an inverse plant model-based disturbance observer is proposed for the control of single-inductor multioutput buck converters (SIMOBCs). The suggested control scheme effectively handles the plant modeling mismatch as well as internal uncertainties in addition to the cross-regulation issues. The controller has been designed using direct synthesis approach in frequency domain and its parameters have been optimized using particle swarm optimization (PSO). The suggested method is generic and can be applied to SIMOBCs of any size and order. This is validated experimentally for SIMOBCs of two as well as three outputs in different test conditions. Superior performance has been observed in terms of overshoot, settling time for disturbance rejection and cross-regulation suppression when compared with other reported control schemes.
Keywords:
Disturbance observer based control
MIMO converter
single inductor dual output buck converters (SIDOBCs)
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