Research Of The Locomotive Adhesion Control Based On Virtual Prototyping And Rail Identification

Within the high-speed and overloaded development of national railway, locomotive must exert full traction power and get a larger average traction.The exertion of traction power depends on the adhesion force between wheel and rail.When locomotive exerts full traction power,the adhesion state between wheel and rail can not be destroyed.At the same time, optimal utilization of adhesion can ensure the safety of trains and make passenger more comfortably.So the research of locomotive adhesion control system has important theoretical and practical value.Currently,re-adhesion control and optimize adhesion control are used.These methods are based on the train dynamics and mathematical derivation.Because electric locomotive is a complex mechatronics system, the simple physical model can not characterize dynamic process of train and response to the real track condition.Vehicle test can truly reflect the various states of train operation, but it has a long period, high cost, and it is difficult to simulate extreme conditions.In this paper,integral 23t overload locomotive virtual prototype model was established.Inverter and traction motor control model, adhesion control system was built by MATLAB software, and then a integral model of the traction drive system and a locomotive adhesion control system based on rail identification was built. The virtual prototype model and adhesion traction drive control systems were combined to build a co-simulation platform, which can be more comprehensively response to the real locomotive dynamic process.The simulation of complex adhesion properties is realized by Fortran and the adhesion force calculation method was extended in SIMPACK.This method can be based on the actual needs of the study and combined with the experimental data to simulate the complex rail surface state.In order to improve the traditional adhesion control system,in this paper, a adhesion control method based on identification of the track surface was designed, which can achieve full utilization of adhesion force.Finally, in order to verify feasibility and correctness of the platform, axle load transfer of train in long and steep ramp was simulated in this platform, and adhesion control system based on identification of the track surface system is loaded into the traction drive system to simulate in this platform.These simulation realized traction calculation which consider the adhesion utilization, and provide a simulation verification for traction checking in special conditions (long and steep ramp, wet road).Simulation analyzed the adhesion control method. The results show that the co-simulation platform is feasible, which can reflect the dynamic response of the locomotive, and verify the correctness of adhesion control system based on identification of the track surface.