Robust control strategies applicable to DC–DC converter with reliability assessment: A review

This paper provides an overview of various control strategies for DC–DC converters along with a brief discussion on various performance indices for evaluating the reliability of designed controller. DC–DC converters are emerging as the fastest-growing interfacing devices in the world because of their emergent applications in almost all domains of engineering. Notably, the non-linear behavior of DC–DC converters offers a perplexing problem in designing a robust controller. A robust controller must ensure proper closed-loop stability with desired performance and reliable control for output voltage regulation in the event of various possible perturbations. This creates the requirement for practically implementable non-linear controllers that can effectively overlook the drawbacks of linear controllers. The prominence of this composition is based on the expansion in tuning techniques of proportional-integral-derivative controller gain parameters using linear strategies and heading towards non-linear strategies by reviewing 196 research papers. The modification in non-linear control strategies in terms of their fundamental features associated with key benefits and limitations are comprehensively reviewed. This study mostly revolves around non-linear internal model control (IMC) strategies for parameter tuning of IMC-based controllers for various order of plants with an improved degree of freedom.