low-order robust controller for dc-dc quadratic buck converter: design and implementation

This paper addresses a key challenge in designing a suitable controller for dc-dc converters to regulate the output voltage effectively within a limited time frame. in addition to non-minimum phase behavior of such type of converter, a significant issue, namely parametric uncertainty, can further complicate this task. robust control theory is an efficient approach to deal with this problem. however, its implementation often requires high-order controllers, which may not be practical due to hardware and computational constraints. here, we propose a low-order robust controller satisfying the robust stability and performance criteria of conventional high-order controllers. to tackle this issue, a constraint optimization problem is formulated, and the evolutionary algorithms are adopted to achieve the optimal parameter values of the controller. both simulation and experimental outcomes have been documented, and a comparative analysis with an optimal proportional-integral (pi) controller has been conducted to substantiate efficiency to the proposed methodology.