Research On Speed Control Of High-speed Train Based On ARSM Control

High-speed railway is a major scientific and technological achievement in the history of railway high and new technology in the world today,and a milestone in railway modernization.In recent years,with the thriving development of high-speed railway,people’s travel efficiency has been greatly improved,so high-speed railway has also become the preferred way for people to travel short and medium distances,which is favored by passengers.The high-speed railway mainly realizes the efficient operation of the train by increasing the speed of the train,and the key to increasing the speed of the train is to equip it with a safe and reliable speed control system.Therefore,it is of great practical significance to design a high-performance speed controller to further improve the accuracy of train speed control,ensure driving safety,and help high-speed railway achieve further acceleration.This thesis takes CRH380 A EMU train as the object,study speed control problem in the high-speed train.The main research contents and innovation points are as follows:Firstly,it introduces the research background and research significance of the topic,and comprehensively analyzes the research status of this topic at home and abroad.Then,the theoretical basis of high-speed train speed control is expounded,and the Automatic Train Control(ATC)system of high-speed train is summarized,including the structure and function of ATC system,and the information interaction between subsystems of ATC system.According to the performance index of high-speed train,the relevant train operation strategies are analyzed.Secondly,the advantages and disadvantages of single-point model,multi-point model and unit-position multi-point model of high-speed trains are comprehensively compared,in view of the lack of accuracy of the single-point model,this thesis establishes the single-point kinematics model of high-speed train under the influence of the single-point model and the uncertainty of external disturbance,which improves the accuracy of the single-point model.Through the analysis of coupling effect between adjacent carriages of high-speed trains,the multi-point model of high-speed train is established,combined with the state-space representation of train model,the multi-point train simulation model is built in SIMULINK based on the relevant parameters of CRH380 A EMU train.Finally,using the advantages of adaptive control and sliding mode control in dealing with uncertainty problems,combined with the established train model,the Adaptive Robust Sliding Mode(ARSM)controller is designed.By simulating the actual operation strategy of high-speed trains,the ideal target curve is set,and the designed speed controller is simulated and verified.The following results can be obtained through experimental comparison: The ARSM controller based on the single-point model has a tracking error of ±0.048 m for the target position curve and ±0.1 km/h for the target speed curve.The ARSM controller based on the multi-point model has a tracking error of ±0.02 m for the target position curve and ±0.06km/h for the target speed curve.The results show that the ARSM controller based on multi-point model improves the position control accuracy by about 58% and the speed control accuracy by about 40%,which has a higher speed control accuracy for high-speed train and is more conducive to ensuring the driving safety of high-speed train.