Output Voltage Stability of a DC-DC Buck Converter via an Improved Backstepping Method

This research presents an improved backstepping control (IBSC) approach to designing a controller for a DC-DC buck converter to improve output voltage regulation under changing operating conditions. To develop the proposed the proposed controller, a state-space DC-DC buck converter dynamical model in continuous conduction mode is first developed. Secondly, to avoid the complexity of virtual control law derivatives in the traditional BSC method, these terms are treated as uncertain terms during the control law design process. Furthermore, the Lyapunov control theory is used to ensure the closed-loop system's global asymptotic stability. Finally, the performance of the proposed IBSC technique is validated using a simulation study on the MATLAB Simulink platform. A comparison of the simulation results is also presented to show the superiority of the proposed approach as compared to the traditional BSC method. The simulation study and quantitative results reveal that the proposed IBSC method outperforms the traditional BSC method.