Control Strategy for Dual-Clutch Transmission Gear Shifting Process in Pure Electric Vehicles Based on LADRC

For the uncertainty of the shift control model and parameters and the existing unknown disturbances of the two-speed dual clutch transmission(2DCT)of pure electric vehicles,a linear active disturbance rejection controller(LADRC)method is proposed. Firstly,the dynamic model of the 2DCT shifting process is established,and the shifting process is analyzed. Then,considering the uncertainty and unknown disturbance of the control model,the LADRC controller is applied to the shifting process to track the desired rotational speed,and the Extended State Observer(ESO)is used to estimate the disturbance in real time and compensate for it. Finally,it is compared with the PID control. Simulation and experimental results show that the controller has smaller tracking error and strong robustness,which ensures good gear shifting quality. © 2024 SAE-China. All rights reserved.