Improving Gains of a PID Controller for Non-Linear DC-DC Converter Using Gray Wolf Optimization Method

This paper considers improving the results of the classical Proportional-derivative-Integral controller that controls the output of the step-down DC-DC converter using the gray wolf optimization algorithm. The transfer function of the converter is considered through multiple cases: without a controller, with redefined gains of the PID controller based on the Ziegler/Nichols method, and redefined gains of the PID controller based on GWO. The results of such interpretation through many iterations of calculations show that the tuning of the PID controller using GWO with integral time absolute error can introduce improved response, increase accuracy, and better output voltage regulation. These results are adopted using MATLAB 2020.