Study On Adhesion Control Of High-speed Train Based On Slip Acceleration

In recent years, with the increasing of speed, the requirements for the safety of high-speed EMU become more and more high. If the train has a slip/slide phenomenon without adhesion control, it will lead to a consumption of both the rails and the wheels. So it’s important to study the adhesion control strategy of high-speed EMU. In order to raise the adhesion utilization, this paper proposes a new adhesion control based on slip acceleration by researching on the adhesion control strategy of the train. Firstly, to introduce the adhesion theory in detail and analysis the major factors of adhesion characteristics. Based on analyzing the mechanical equations of traction motor and railway vehicles, kinetics model of single driving axle is established. In order to study adhesion control method,to build a simulation platform of the CRH2A EMU’s kinetics model by MATLAB/Simulink, This theory was proved correct by the simulation. In this paper, in order to imitate slip/slide phenomenon, we change the adhesion characteristic curve from dry road condition to the wet road condition. Secondly, this paper proposes a new adhesion control based on slip acceleration, verified the adhesion control method based on slip acceleration better then combined correction method at braking distance and time by simulation. Finally, the adhesion control method based on slip acceleration and combined correction method are realized in the5.5kW semi-physical adhesion experimental platform, the experimental results show that the proposed method is superior to combined correction method, Verified the adhesion control method based on slip acceleration can achieve high adhesion utilization.