Method of Enhanced Robust Control of the DC-DC Converters Based on Adaptive Nonlinear State Observer

In an effort to enhance the dynamic performance and reduce interference in the DC-DC boost converter, this paper proposes an improved active disturbance rejection control (ADRC) methodology. Firstly, the converter's dynamic model is implemented, treating all system uncertainties as the collective disturbance present in the input side. To achieve heightened estimation precision and quicker dynamic response, a novel adaptive nonlinear state observer (ANSO) is established to assess the potential disturbance, distinguishing it from the conventional extended state observer (ESO). Subsequently, a linear feedback control law is devised to counteract the disturbance and regulate the output voltage, ensuring stability throughout the entire closed-loop system. Finally, the good performance of the proposed approach is substantiated through simulation results.