Design and implementation of online estimation based backstepping controller for dc dc buck converters

Abstract

DC DC buck converters belong to the class of complex and time varying variable structure systems These are primarily employed to obtain an uninterrupted lower level of DC voltage at the output end from a DC input voltage source However the output voltage tracking in these converters is significantly sensitive to unanticipated load disturbances parametric uncertainties and input voltage fluctuations In this thesis a few backstepping based adaptive control methodologies have been proposed fo