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Compensator-based current sensorless control for PWM-based DC-DC buck converter system with uncertain voltage measurement

This paper investigates the output feedback control problem for a PWM-based DC-DC buck converter system with uncertain voltage measurement. Due to the uncertain output measurement, the conventional state observers are not feasible. Inspired by the idea of a lead compensator in classic linear control theory, we propose a compensator-based current sensorless controller by designing a novel dynamic estimator which only uses the uncertain voltage measurement. A Lyapunov-based stability analysis is provided and the numerical simulation studies demonstrate the effectiveness of the proposed method.