Extended Super Twisting Finite-Time Controller Design for DC/DC Buck Converters under Uncertain Conditions

To build the controller for Buck type DC/DC converters under uncertainty, a Super Twisting Algorithm (STA) based on homogeneity theory extension is proposed to achieve robust control with finite time stability. The Super Twisting Algorithm is extended to second-order systems, and its finite time stability is demonstrated based on the theory of homogeneity. Finally, simulation experiments and comparisons with homogeneous second-order sliding mode and ordinary sliding mode control methods indicate the superiority of the proposed method in combating uncertainty.