Finite-time output feedback control for DC-DC buck power converters system

This paper investigates the finite-time output feedback control problem for DC-DC buck converter systems. By using the techniques of finite-time controller and finite-time convergent observer, a new fast voltage regulation control algorithm is designed which can guarantee that the output voltage converges to the reference voltage in the finite time. An inductive current convergent observers has been designed to estimate the unknown current in the finite time. Compared with the PI control algorithm, simulation results show that the proposed algorithm has a faster regulation performance under the condition of load-variation and reference voltage change.