Research On Intelligent Generation Method Of High-Speed Railway Train Dispatching Command

In recent years,with the increase of network density and running speed of high-speed railway,dispatching work plays an increasingly important role.Dispatching command is the command for train dispatcher to direct train operation,organize construction and maintenance,and deal with emergencies.At present,China’s high-speed railway train dispatching commands are mainly manually edited and issued by dispatchers in the dispatching command management module of CTC system.Among them,the construction and maintenance commands are large in number and issued frequently.The dispatching commands in the case of emergency disposal require high timeliness.These massive and highly time-efficient dispatching command requirements are an important part of the work of dispatcher,and occupy a large amount of their working time.Moreover,under the high intensity of the work,such non-standard situations as miswords and missing words of dispatching command are often occurred.Aiming at the above problems,this thesis researches the intelligent generation method of high-speed railway train dispatching command,and develops an intelligent generation system of high-speed railway dispatching command.The main work of this thesis are as follow:(1)Firstly,this thesis introduces the dispatching organization of high-speed railway,the positions of dispatching and dispatching command management system in China.Secondly,the characteristics and structure of dispatching command are summarized.Thirdly,the publishing scenarios of dispatching command and the publishing process under different scenarios are summarized,and the research emphases of this thesis are determined.(2)An intelligent generation method of high-speed railway dispatching command based on dispatching telephone is proposed.The method consists of three modules: dispatching telephone speech recognition,dispatching command template matching and dispatching command parameter extraction and filling.In the first module,the dispatching telephone speech is transformed into text.Firstly,the Chinese speech recognition interface i Flytek Java SDK is extended to adapt to the professional field of railway dispatching.Secondly,an error correction method of speech recognition results is proposed,which improves the accuracy of speech recognition module.The second module implements the dispatching command template matching.Firstly,two text similarity calculation methods,Levenshetin Distance and Vector Space Model based on TF-IDF method,are introduced and the process of applying them to dispatching command template matching are described in detail.To compare their effects,an experiment is designed to test their matching accuracy.The experimental results show that VSM has higher accuracy and it is chosen as the main matching method in this thesis.At the same time,the overall matching accuracy is improved by establishing the dispatching command scenario-dispatching command template knowledge base.In the third module,the method of extracting and filling parameters of dispatching command is constructed based on regular expression,and the specific process is given.Finally,the experiment proves that the intelligent dispatching command generation method composed of the above three modules can generate accurate dispatching command within 2.5s after the end of the dispatching telephone.(3)An intelligent generation system of dispatching command for high-speed railway is designed.With the support of the above theoretical methods,the configuration environment,functional requirements and architecture of the system are analyzed.A system to automatically generate dispatching commands by dispatching telephone is developed using Java,and the application effect of the system is demonstrated.