| 列控系统中数据通信子系统可靠性研究 |
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| 引用本文： | 徐田华,李树,唐涛.列控系统中数据通信子系统可靠性研究[J].北京交通大学学报(自然科学版),2007,31(5):23-26,43. |
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| 作者姓名： | 徐田华 李树 唐涛 |
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| 作者单位： | 北京交通大学,轨道交通控制与安全国家重点实验室,北京,100044;清华大学,电子工程学院,北京,100084 |
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| 基金项目： | 北京市科委科研项目
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北京市教委资助项目 |
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| 摘 要： | 列控系统中数据通信子系统的可靠性对于保障列车安全高效运营具有重要作用.利用马尔可夫模型,综合了随机信道恶化,越区切换、无线接入设备故障等无线信道失效因素,提出了数据通信子系统非冗余结构和冗余结构的可靠性模型,分析了不同的数据通信系统结构对可靠性能的影响.同时,给出了列车运行速度与系统可用性指标的相互关系.分析结果显示,冗余结构的数据通信子系统有效提高了通信系统的可靠性;冗余结构的系统可用性指标比非冗余结构提高了大约两个数量级,达到99.99%;冗余结构有效消除了列车越区切换对系统可靠性能的影响.
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| 关 键 词： | 基于通信的列车控制系统 可靠性分析 马尔可夫过程 冗余结构 可用性 |
| 文章编号： | 1673-0291（2007）05-0023-04 |
| 修稿时间： | 2007-01-26 |
Dependability Analysis of Data Communication Subsystem in Train Control System |
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| XU Tian-hua,LI Shu,TANG Tao.Dependability Analysis of Data Communication Subsystem in Train Control System[J].JOURNAL OF BEIJING JIAOTONG UNIVERSITY,2007,31(5):23-26,43. |
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| Authors: | XU Tian-hua LI Shu TANG Tao |
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| Institution: | 1, State Key Laboratory of Rail Traffic Control and Safety, Beijing Jiaotong University, Beijing 100044, China; 2, Department of Electronic Engineering, Tsinghua University, Beijing 100084, China |
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| Abstract: | The data communication subsystem(DCS) in control system is important to ensure the high efficiency and safety of train control.Based Markov process,the dependability model of DCS,which captures the channel degrade,handover and AP failure,is proposed.The influence of different configuration and train velocity on the dependability of DCS is analysis.Performance evaluation shows that the redundancy configuration of DCS gains significant improvement in reliability than that of the no-redundancy one.The availability of redundancy configuration is as much as 99.99%,which is about 100 times higher than that of the no-redundancy configuration.The redundancy configuration can efficiently eliminate the impact of handover on the dependability of DCS. |
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| Keywords: | communication based train control system(CBTC) dependability analysis Markov process redundancy configuration availability |
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