Periodic Time-Triggered Hybrid Control for DC-DC Converter Based on Switched Affine System Model

The introduction of the switched affine system opens new perspectives for the control design of dc-dc converters. In order to overcome the drawbacks of the continuous-time switching control methods, several sampled-data-based switching control approaches have been proposed in the literature. However, in these works, the solution of control parameters involves a nonlinear optimization problem. In addition, the designed switching laws are nonlinear functions about the system state, which require higher computational resources. In this article, a periodic time-triggered hybrid control is proposed based on a new design framework. All the design conditions are in linear matrix inequality formulations, which can be conveniently solved by common semidefinite programming software. Moreover, the proposed switching law is a linear function about the state, reducing the online computing burden. Finally, a unified view of the classical continuous-time switching scheme and the proposed method is established. Simulation and experiment tests on a buck-boost converter demonstrate the good performance of the proposed control strategy.

Automated summary

The introduction of the switched affine system opens new possibilities for the control design of dc-dc converters. However, existing methods suffer from nonlinear optimization problems and high computational resource requirements. This article proposes a new hybrid control scheme based on linear matrix inequality formulations, reducing the online computing burden and establishing a unified view with classical continuous-time switching schemes.