Research On Locomotive Anti-Slid Based On Virtual Prototype Technology

With the rapid development of China's economy,the demand for railway transportation capacity is also increasing.However,due to the wide geographical area,complex terrain and lines in China,the track surface of the wheels of the engine often changes,causing locomotive problems during the operation of locomotives to occur from time to time,which has a serious impact on the operating efficiency of locomotives.Therefore,in order to improve the railway's transport capacity,it is necessary to strengthen the research on locomotive anti-slip control methods.When researching locomotive anti-slip control methods,the use of physical prototypes leads to huge waste,and it is difficult to use physical prototype models for complex conditions.The use of virtual prototyping technology to test the locomotive will save a lot of costs,and can simulate a variety of test conditions.The study is shown as follows:Through studying a large amount of documents at home and abroad about locomotive slip identification criteria and anti-slip control methods,this paper summarizes and analyzes the current methods of locomotive anti-slip control and concludes the research issues.At the same time,extensively consulted about modeling and simulation of locomotives both at home and abroad and sought a simulation method that is more conducive to reflecting locomotive characteristics.Aiming at the problems existing in the study of the anti-slip control system using the simplified locomotive model,the multi-body dynamics model of the locomotive built by ADAMS virtual prototype was given,and on this basis,a collaborative simulation platform was established together with MATLAB/SIMULIK.This will help solve the coupling between the locomotive subsystems,making the locomotive system model in the test a little different from the actual vehicle system in order to verify the locomotive control method.For locomotives in the process of anti-slip control,the locomotive control method is affected greatly by the axle load transfer,and a locomotive anti-slip control method is proposed under the axle load transfer.The axles of the locomotive are separately controlled to ensure that after the locomotive is slipping,each axle can quickly return to normal,enabling the locomotive to operate efficiently on the rail surface.Aiming at the problems of the slip identification and the optimal sticking point in the sticking characteristic curve slope method,the locomotive anti-slip method is proposed to improve the sticking characteristic curve slope method.Using the differential of the sticking coefficient and the creep speed as the criteria for identifying the state of the locomotive can accurately determine the locomotive state under a complex operating environment.And set a new adhesion best point criteria to improve the adhesion performance of locomotives.