【作者】 任春霞；

【导师】 谭南林；

【作者基本信息】 北京交通大学 ， 安全技术及工程， 2008， 硕士

【摘要】 随着现代地铁列车运行速度的不断提高,运输负载量的不断增大,发车间隔的不断缩短,这对地铁列车的安全性和可靠性提出了更高要求。地铁列车监控系统能够实现列车全线自动驾驶、超速防护以及故障分析和远程监控的功能,减少了人工控制的环节,提高了系统响应时间和速度。本论文以“广州地铁1号线国产化改造”为背景,全面实现了地铁列车监控系统主控单元的国产化设计。基于对原有模块总线传输特性的研究,本设计选用了新的列车总线和车辆总线,在全面分析其协议性能的基础上对应用层的协议转换模型进行了深入的研究和探讨。主控单元在结构上主要分为四个模块:HDLC总线通信模块、车辆和列车总线的CAN通信模块、数据缓冲模块、主CPU模块。其中HDLC模块使用串行通信控制器实现监控系统的大部分控制功能;CAN总线通信模块使用CAN控制、收发器采集车辆的状态信息;数据缓冲模块通过双口RAM实现HDLC和CAN总线的数据交换;主CPU模块使用ARM7微控制器加载uC/OS-Ⅱ实时操作系统对多任务进行调度,同时为满足系统对分时任务的需求,对uC/OS-Ⅱ的调度算法增加了一级时间片轮转的调度策略。然后,利用RM模型对系统的周期性多任务进行了可调度性分析,并对多影响因素反复测试、计量,使之达到综合最优调度,确保了系统任务设计的合理、安全、可靠。最后通过搭建的模拟平台进行了多项组网测试,充分验证了广州地铁1号线监控系统主控单元整体的实时性、负载能力以及可靠性,完成了国产化设计。更多还原

【Abstract】 With the running speed accelerating, the transportation load increasing, and the idle time declining of modern subway, the security and reliability of the train become more and more important. The train monitoring system is designed to realize automatic drive, speed limit, malfunction analysis and remote control. These functions reduce the risks from manual operation, and enhance the response time and performance.This paper described the detailed design of the central control unit used in the train monitoring system, which belonged to the project "Localization of Guangzhou Metro Line No.1". The new train bus and vehicle bus were chosen in this design based on the analysis of performance of the original module bus, and detailed research of the protocol convertion model in application layer was made based on the deep analysis of performance of the bus.Central control unit consisted of 4 modules: HDLC communication bus module, vehicle and train CAN communication bus module, data buffer module, the host CPU module. The HDLC module took charge of main control tasks of the monitoring system using high-level communication controller; The CAN module collected the status of vehicle by CAN controller and transceiver; The data buffer module finished the data change of HDLC and CAN via dpram;The host CPU module was designed with real-time OS-uC/OS-II transplanted the ARM miro controller to schedule the system mutil-tasks. Meanwhile the uC/OS-II was improved through increasing the Round-Robin scheduling strategy. Then the performanced possibility of periodic mutil-tasks was proved and the multi-influencing factor was tested repeatedly to achieve the most superior schedule making use of RM model fully to guarante the security, reliability, rationality.Through several networking tests based on building simulation platform, the central control unit in montoring system for metro Guangzhou Linel was verificated to be reliable and high response under heavy load environment and localized successfully.更多还原