Adhesion Control of Bogie-Controlled Inner-city Trains

Adhesion control is an essential prerequisite to ensure safe operation of inner-city trains. Inner-city trains are operated jointly on the ground and underground. External factors, such as passenger capacity changes, different rail surface conditions, will cause inefficient traction of inner-city trains, low rate of adhesion utilization, and frequent idling. Aiming at these problems, an adhesion control method based on the optimal torque searching and receiving is proposed. Firstly, the dynamic model of inner-city trains is established according to the bogie-controlled characteristics of inner-city trains traction system. Secondly, the bogies are set as searching and receiving bogies, which adopt different adhesion control method respectively to realize the optimal adjustment of traction torque. Finally, real-time simulation based on two different track surface conditions is carried out on the Starsim platform to verify the effectiveness. Compared with traditional combined correction adhesion control method, the simulation results show that the proposed method increases average traction torque, increases average adhesion utilization, and decreases the idling times. When the inner-city train is unloaded, the average traction torque increases by 9.47 % and 11.51 %, the average adhesion utilization increases by 7.12 % and 8.38 %, the average idling times decreases by 57.14 % and 78.95 % respectively; When the inner-city train is overloaded, the average traction torque increases by 13.05 % and 19.27 %, the average adhesion utilization increases by 8.96 % and 13.54 %, the average idling times decreases by 55.56 % and 77.78 % respectively.