| Because the number of city residents in the country increases,bring enormous pressure to the traffic system.Urban rail transit has the characteristics of large volume,rapid,safe and positive point.It can effectively reduce urban traffic pressure.But as urban rail transit networks become complex and the volume of passenger traffic increase,we have high requirements for the efficiency and safety of urban rail transit.With the development of artificial intelligence,communication transmission,automation technology and information technology,the urban rail transit system which relies on manual driving has not satisfied the development status of urban rail transit,such as the increase in passenger flow and operating costs.All countries in the world are constantly developing new technologies to improve urban rail transit system,in order to improve transportation efficiency,service quality and operation safety.The full automatic rail transit operation technology arises at the historic moment.As a passenger transport system which guides the development trend of urban rail transit,the full automatic operation system has outstanding technical advanced,high safety and reliability.It can increase the passing capacity of the line meet the requirements of small marshalling and high density driving organization and improve the flexibility of operation.It has the effect of reducing running distance,improving train speed,improving service level,improving operation management level,reducing staffing and reducing operation cost.But now our country’s full automatic operation system is still lack of experience in engineering application.This paper is based on the Shenzhen Metro as the background,takes Line 12 as the research object.Comparing automatic operation system and artificial operation system,to analyze the requirements of the unmanned driving full automatic operation signal system of Shenzhen Metro Line 12.Combined with the analysis results,the overall solution of the full automatic operation signal system of Shenzhen Metro Line 12 is formulated,and the solution is refined to the system function scheme and the equipment configuration scheme,to plan the design and construction of the full automatic operation signal system of Shenzhen metro.For the optimization of the key indexes of the fully automatic operation signal system,this paper mainly studies the principle of train tracking in the automatic operation signal system,establishes the train emergency braking model,and clarifies the three most important factors that affect the train tracking.On this basis,the mathematical models of interval tracking interval,inter station tracking interval and return interval model are respectively established in the course of train operation.Combined with the actual operation of line 12,through the analysis of the tracking model to calculate the interval of driving,and use the simulation data to prove that the model can compress the driving interval and optimize the driving efficiency.This paper can guide the design,construction and operation of Shenzhen Metro Line 12 full automatic operation signal system.It provides a reference template for the construction of the fully automatic operation system of Shenzhen Metro in the future,and has a certain practical significance for the engineering research of the urban track full automatic operation signal system. |
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