Dynamic Adjustment And Cooperative Control Of High-speed Railway Based On Global Structure Model

High-speed railway,which promotes the rapid flow of talents,capital,technology and information,has become a fast way to boost local economic development.This paper studies the problem of dynamic adjustment and cooperative control of high-speed railway from a new perspective of constructing a global structure model.This study might provide a reference for improving the existing scheduling and control mechanism of high-speed railway and improving operational efficiency and the ability to deal with emergencies.The main research contents of this paper are as follows:Firstly,the delay propagation mechanism under emergencies is studied and a global structure model of high-speed railway is constructed.By analyzing the operating performance of trains and line equipment,and the interaction of train,line and network under an emergency,a delay propagation model based on operating performance evaluation is constructed.Furthermore,the delay of the whole network is analyzed,some dynamic characteristic parameters such as key sections and key trains are extracted,and a global structure model based on train delay propagation prediction is constructed.On this basis,the problem of train dynamic adjustment is studied.Through the analysis of the global structure model,the running sequence adjustment and mixed integer programming model parameter optimization of the key trains of the key sections are carried out,which effectively improves the efficiency of train operation adjustment under emergencies.Secondly,the problem of multiple trains cooperative control under moving signaling system is studied.A distributed control algorithm with acceleration zone and constraints is proposed.First,in order to reduce adjustment and communication during train operation,a switching control mechanism with acceleration zone is introduced.Secondly,through model transformation,three different nonlinearities of acceleration zone,constraints and resistance are decoupled,and the system is transformed into an equivalent time-varying linear system whose system matrix is a stochastic matrix.Finally,according to the properties of stochastic matrices and applying the method of convex analysis,it is proved that all the trains can track the desired speed and keep a safe distance to run cooperatively.Finally,based on the research contents and results of the global structure model,dynamic adjustment and multiple trains cooperative control,the operation and maintenance theory of high-speed railway signaling system is systematically studied from a global perspective.Firstly,a concept of interrelated signaling system is defined and a decentralized dynamic evaluation function is proposed.Then,the dynamic scheduling and operation control of high-speed railway are incorporated into the operation and maintenance system,and the theoretical model of the operation and maintenance layered architecture of the high-speed railway signaling system is constructed.On this basis,combining the research on system-level operation and maintenance mechanism with the method of big data analysis,a research method for dynamic quantitative assessment,dynamic risk early warning and fault diagnosis of high-speed railway signaling system is proposed.