Torque Ripple Suppression Strategy of Electromechanical Coupling System of Hybrid Electric Towing Vehicle Based on Feedforward Control

Aiming at the problem of output torque ripple of power split engine motor power system coupled with planetary gear train, based on the dynamic model of the system, the torque ripple suppression algorithm considering coupling device and engine instantaneous torque observer based on engine instantaneous torque are designed. In order to solve the problem that a single control method fails to meet the steady-state performance and response time at the same time, a torque ripple suppression strategy of electromechanical coupling system based on feedforward control is proposed. Combined with the modeling of GT-power and MATLAB / Simulink platform, the rated operating points are simulated in coordinated driving mode and input split mode respectively. The results show that the control strategy can reduce the output torque ripple of the ring gear by 25.46% and 19.34% respectively in coordinated driving mode and input split mode. The control strategy can reduce the output torque ripple by 14.30% and speed ripple by 37.32% in the dynamic condition of PTO intervention.