Experimental validation of a non-linear robust controller for DC-DC boost converters

Abstract

This paper presents the implementation of a nonlinear robust controller in a boost converter, which operates in an uncertain environment. The proposed controller deals with uncertainties, which are unknown but bounded, and occur in the input voltage and the output pure resistive load. Mathematical proof of the efficiency of the controller and quantitative results about the amount of the uncertainty that can be addressed are also presented. Controller stability and efficiency are further improved by applying Gain Scheduling theory and solving the appropriate optimization problem. Finally, the proposed controller operation is validated through experiments in a real boost converter constructed in the Electrical Power Systems Laboratory of National Technical University of Athens.