H-infinity LPV Control with Pole Placement Constraints for Synchronous Buck Converters with Piecewise-Constant Loads

摘要

This paper addresses the output regulation problem of synchronous buck converters with piecewise-constant load fluctuations via linear parameter varying (LPV) control scheme. To this end, an output-error state-space model is first derived in the form of LPV systems so that it can involve amismatch error that temporally arises from the process of generating a feedforward control. Then, to attenuate the mismatch error in parallel with improving the transient behavior of the converter, this paper proposes an LMI-based stabilization condition capable of achieving both H-infinity and pole-placement objectives. Finally, the simulation and experimental results are provided to show the validity of our approach.