ctcs3级车载设备测试平台研究-交通信息工程及控制专业毕业论文.docx

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AB STRACT
ABSTRACT:Nowadays,with the rapid development of the railway,the updating and perfecting of the train control system guarantees that the train Can run winl a higher speed and 2ha level of CTCS(Chinese train control system)has been used on CRH,a higher level—the 3rd level of CTCS that controls the train running at 300km/h or a higher speed is being the railway system requires high safety all the
time,CTCS3 equipment as the high—speed train control system should be more stable
and research of the system testing just begin in our country,while the testing work of the 2nd level of European Train Control System began several years ago,and
some test cases of the cab equipment have be there are some differences
between ETCS2 and CTCS3,SO we have to research core technologies of CTCS3 ourselves.
According to the forei印published material,this paper investigates the testing
method of the function and safety of On-board are four parts in this
Paper.
First,the cab signal function requirements are analyzed;including the architecture and the function of the On—board equipment,kinds of operating modes and operating in this part a method of creating test cases according to the operating processions of the train is ,the train operating processions are divided
into actions and status with modeling them,and function features and test cases are
created according to these actions and last a data structure of the test cases has to be designed for easy stored and ,this part is the most important one in the this part an algorithm is designed to create a better mode—sequence which Can coVer all the mode transforms and has a higher algorithm uses graph theory and mathematical programming to solve the how to arrange test cases into test sequence is researched,and some examples about this are ,