Research on sliding mode control of DC-DC converter for vehicle

The control problem of vehicle DC-DC converter is the key problem of the new energy vehicle power system. In this study, Averaged state space method is used to develop converter model. the new global fast terminal sliding mode control scheme is proposed as a new approach for the voltage tracking control, a new control design method is developed to obviate the DC-DC converter disturbances. In order to evaluate the accuracy and effectiveness of proposed method, designed controller is simulated using MATLAB/Simulink S-function. The time reaching the sliding surface and equilibrium point are precisely calculated, system stability is analyzed. Simulation results show that the new sliding mode variable structure controller compared with the traditional sliding mode control method has the advantages of controllable convergence time, fast convergence speed and controllable precision, and more stronger robustness.