自动控制文献翻译——高速铁路的建设与运营过程中，通讯信号设施的安全性和可靠性显得尤为重要。与以往铁路通信信号不同，高速铁路取消了地面信号，以车载信号为行车依据，这就要求高速铁路车载信号有极高的准确性时效性、稳定性。与之配套的地面设备(GSM-R陆地移动设备、FAS固定网络和固定终端等)为车载信号的正常运行提供了强有力的保障。作为一个体统，通信信号设备的任一部分出现异常，都会影响到整系统信号的传输与反馈。因此对地面通信设备的集中监控、远程维护、故障诊断、环境动力监测等维护管理显得尤为重要，也直接关系到高速铁路的建设和安全运行。

1 CTCS-3级系统构成与功能

1.1 地面设备系统组成与功能

地面设备层主要包括列控中心(TCC)、无线闭塞中心(RBC)、轨道电路(ZPW-2000(UM))或点式设备(含LEU)、接口单元、无线通信模块(GSM-R)等。列控中心是地面设备的核心，根据行车命令、列车进路、列车运行状况和设备状态，通过安全逻辑运算，产生控车命令，实现对运行列车的控制。作为列控系统核心的RBC，是使用无线通信手段的地面列车间隔控制系统。它根据列车占用情况及进路状态向所管辖列车发出移动授权和列车控制信息。GSM-R地面设备作为系统信息传输平台完成地—车间大容量的信息交换。点式设备提供列车定位信息；轨道电路主要用于列车占用检测及列车完整性检查，而将轨道电路作为传输通道为列车传送车载辅助信号或校正信号也成为当今铁路通信信号的一个热门研究方向。

1.2 车载设备系统组成与功能

车载设备由车载安全计算机(VC)、GSM-R无线通信单元(RTU)、轨道电路信息接收单元(TCR)、应答器信息接收模块(BTM)、记录单元(JRU/DRU)、人机界面(DMI)、列车接口单元(TIU)等组成。GSM-R车载设备作为系统信息传输平台完成车—地间大容量的信息交换。点式信息接收模块完成点式信息的接收与处理。测速模块实时监测列车运行速度并计算列车走行距离。车载安全计算机对列车运行控制信息进行综合处理，生存目标距离模式曲线，控制列车按命令运行等。

2 危险因素辨识

2.1 RBC与GSM-R传输故障

RBC通过GSM-R传输通信数据，生成速度—距离监控所需要的移动授权信息 MA，使车载自动超速防护系统ATP对列车进行防护。RBC与GSM-R通信出现中断，会导致整个通信环路断裂，行车许可、线路参数、临时限速等无法传输到车载计算机，仅依靠轨道电路及应答器传送的数据无法生成MA，致使行车中断，列车在ATP的保护下扣行于线路，影响整条线路的正常行车。现用于高速铁路的轨道电路主要以ZPW-2000为主。运用载频、频偏技术，在超长无缝电气绝缘钢轨上传输轨道占用信号。若某一电气绝缘装置发生故障，则前一区段所传输过来的信号无法电气绝缘和变频，导致后一区段与前一区......

Abstract

CTCS-3 train control system has been in China the use of sophisticated high-speed rail. This paper describes its ground surface composition and automotive equipment, traffic patterns, etc, into the further understanding of the relative contact with various parts of the system, analysis of the common risk factors occur when part of a large affect the system, so that the accident prevention and early provide clues to treatment-related failures and dangerous time is now assessment.

Keywords: Grade CTCS-3 train control system, Risk factors, Fault analysis, System constitutes

Train Control System Identify Common Risk Factors of Grade CTCS-3

Construction and operation of high-speed railway in the process, pass safety and reliability of telecommunications signals facility is particularly important. Different from previous railway communication signals, high-speed rail road canceled terrestrial signals, according to car traffic signal data, which requires high-speed railway vehicle has a high signal accuracy, timeliness, stability. Ancillary terrestrial

device (GSM-R mobile land, FAS fixed network and the fixed contact terminals) for normal operation of the vehicle signal provides a strong guarantee. As a decency, pass any part of the letter appears abnormal signal equipment will shadow response to the transmission signal and the feedback of the entire system. Therefore, centralized monitoring ground communication equipment, remote maintenance, so fault diagnostics, environmental monitoring, power management is to maintain, especially is important, but also directly related to the high speed railway construction and safe operation.

1 CTCS-3 system configuration and function 

1.1 System components and functions of ground equipment

Ground equipment level including train control center (TCC), Radio Block Center (RBC), track circuit (ZPW-2000(UM)) or point-device (including LEU), an interface unit, a wireless communication module (GSM-R) and the like. Row ground control center is the core of the device, according to the traffic order , train route, the train running status and device status, by safety logic operations, generates a control command vehicle to achieve control of the operation of the train. As the core of the train control system RBC, is used between the ground train radio communication means every control system. It is based on occupancy and the way the train state issued a mandate to move to the jurisdiction of the train and the train control information. GSM-R ground equipment as system information transmission platform completed to large amounts of information workshop exchange. Point.......