2016
IMAACA 2016 Proceeding
Robust stabilization of DC-DC buck converter via bond-graph prototyping
Authors: S. Junco, J. Tomassini, M. Nacusse
Abstract
This paper presents the application of a technique called Bond-Graph Prototyping (BGP) to the design of a robust controller globally stabilizing an arbitrary equilibrium point of the DC-DC Buck converter. The method qualifies as an energy- and power-based design, as it proceeds entirely in the BG domain. The nonlinear averaged BG of the converter is used as the plant model. The first design step is to construct a so-called Target BG (TBG) specifying the desired closed-loop behaviour. Then, via BGP, a Virtual BG emulating the internal behaviour of the modulated source providing the control action is constructed which, coupled to the plant BG yields an equivalent to the TBG. Finally, integral action is applied to the closed-loop in order to provide robustness against parameter uncertainty and external disturbances. The design is performed for a generic dissipative load and then particularized for a linear resistance, for which the numerical validation via simulation is provided.
I3M Scientific Sponsors
I3M Industrial Sponsors
I3M Media Sponsors
