Application Of Integrated Speed Measurement System And Model Predictive Control Of Trains To ATO System

With the development of the national economy and the advancement of technology,building a powerful transportation country has become one of the melody of our time.The "powerful country,the railway first" has put forward new requirements and goals for the development of our high-speed railway.The high-speed railway is characterized by efficient,punctual,safe and comfortable transport of passengers to their destination.In order to further highlight the development of high-speed railways,accurate train speed measurement technology and efficient and comfortable train automatic operation technology are indispensable.Therefore,this paper focuses on the accurate speed measurement and high-efficiency and comfortable tracking curve of high-speed railway.The details are as follows:The first part introduces and analyzes the current train speed measurement technology and train tracking technology at home and abroad,discusses its advanced nature and its shortcomings,and conducts automatic train control system(ATC)before proposing new train speed measurement and train tracking technology.The related introduction and analysis provide a theoretical basis for the next specific speed measurement and control system.In the second part,the train speed measurement system is analyzed and improved,and the comprehensive train speed measurement system is proposed.Firstly,the coding counters and Doppler radar speed measurement methods in the integrated speed measurement system are introduced,and the shortcomings and limitations of their application alone are proposed.Then we put forward the comprehensive train speed measurement system we used,and analyzed the failure rate of the train comprehensive speed measurement system by FTA analysis method to ensure that it meets the SIL level of the high speed railway for the speed measurement positioning system.The third part first analyzes the traction braking and train model of the train,formulates and models the train,establishes the train motion model,and then establishes the prediction model of the train based on the state space,and according to the principle of train traction braking.The speed tracking MPC controller is designed for the train traction model and the braking model,and the traction braking switching strategy is designed.Train speed tracking based on model predictive control is completed.The fourth part is about the simulation of the integrated train speed measurementsystem and the train tracking system based on model predictive control.First of all,the simulation laboratory of CRSC has a large number of train actual operation data in the laboratory for reference.By simulating the actual train operation data,it is verified that the train comprehensive speed measurement system can effectively eliminate the influence of wheel slip on the train speed measurement;and the train tracking system based on model predictive control has very good robustness and good speed tracking performance.And control the comfort of the car,but also has a good inhibitory effect on the disturbance.