SIMULATION STUDY OF AN IMPROVED FUZZY LOGIC CONTROLLER FOR A DC–DC BUCK CONVERTER
Abstract
This paper presents a simulation study on an improved fuzzy logic controller for a 100-W DC–DC buck converter to enhance output voltage regulation under varying input voltage and load conditions. The proposed controller is designed by appropriately selecting fuzzy control rules, linguistic variables, and their ranges to achieve effective nonlinear control. A detailed simulation model is developed in the MATLAB/ Simulink environment, and the control performance is evaluated in comparison with a conventional proportional–integral controller under different operating scenarios. Simulation results demonstrate that the proposed fuzzy logic controller provides a faster transient response, eliminates overshoot, and reduces
output voltage oscillations under both full-load and 50% load conditions. Furthermore, a comparison with recently reported fuzzy logic–based controllers confirms the effectiveness and robustness of the proposed approach for DC–DC buck converter applications.
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