Abstract：A dual active bridge（DAB）DC-DC converter voltage control strategy based on double-integral

sliding mode control was proposed，which can obtain good control effect under the condition that the model

accuracy requirements are low and the controller design process is simple. Firstly，the reduced-order model of the

converter was established based on the single-phase shift modulation mode. Then，the output voltage controller of

the converter was designed by using the double-integral sliding mode control theory. The design process introduced

the time domain analysis method to analyze the sliding surface coefficients. Finally，simulation and experimental

results show the effectiveness of the proposed control strategy.

      Key words：double-integral sliding mode control；reduced-order model；time domain analysis method