Based on the average model of Buck DC-DC power converters, which worked according to pulse width modulation principle, adaptive dynamic surface controller was designed. The controller can drive a class of Buck DC-DC power converters to operate well. It tracks the reference output voltage accurately, and has good robustness and adaptability for the parameter uncertainty. Adaptive dynamic surface control is a simplified algorithm for adaptive backstepping control of nonlinear systems. The addition of n-1 first-order filters allows the algorithm to be implemented without differentiating any model nonlinearities and suffering from the problem of the explosion of terms. When the filter time is small enough and the surface gain is selected reasonably, the controller is easy and prone to be practiced, and can guarantee semi-global stability. The effectiveness of the proposed control scheme is verified by the simulation.

Dynamic surface control,    , Parameter uncertainty,    , Power converters,    , Backstepping control