关键词: 电驱动履带车辆, 大阶比传动, 换挡控制, 电机调速, Modelica语言

Abstract: The instantaneous high-torque output characteristic of the electric drive system has promoted the application of large-order shifting transmission. Although large-order shifting transmissions can better match the efficient working range of the motor, they generate greater speed differences and torque fluctuations during shifting, making the shifting control problem increasingly prominent. Therefore, a large gear ratio shift model for the transmission of electric drive tracked vehicles is established via Modelica language. The control logic of the drive motor speed and torque during the power shift process is studied for reducing the friction power consumption, dynamic load and vehicle speed loss. The results show that the motor speed regulation ability is the key factor restricting the shifting quality during the power shifting process. The timing and slope parameters of the fuel filling curve have a significant impact on the comprehensive evaluation results. Appropriate oil filling timing and slope can effectively reduce the sliding friction power, and also decrease the dynamic load and vehicle speed loss. Therefore, it is necessary to design the timing sequence and oil pressure parameters according to different working conditions to achieve the best shift performance.

Key words: electric driven tracked vehicles, large-order shifting transmission, shift control, motor speed regulation, Modelica language