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In order to improve the control performance of the robot driver, the dynamic analysis of its key parts such as throttle and brake mechanical legs are carried out, furthermore, a co-simulation platform of the robot based on speed control is built, and the movement of the robot in the process is analyzed.The mechanical legs dynamic simulation model is built by ADAMS, and then the vehicle model is built by CarSim while the electromechanical co-simulation model "Robot Driver-Vehicle" is built based on the closed-loop speed control in MATLAB/Simulink.Simulation results show that the dynamic model of mechanical leg has good dynamic response;In addition, the electromechanical co-simulation model is able to complete the basic speed tracking simulation experiment, so as to provide a virtual simulation platform to improve the mechanical structure and control strategy.