北斗卫星导航系统在青藏铁路列车定位中的应用研究

发布时间：2018-10-17 18:33

【摘要】：青藏铁路格拉段地处青藏高原,全线84%的路段海拔在4000m以上,气候条件非常恶劣,常年缺氧、低温、暴雪等,因此,研究开发能够减少设备维护量、降低人员工作强度、提高运输效率的列控系统是青藏铁路的迫切需求。增强型列车控制系统(ITCS)是基于GSM-R无线通信和卫星定位技术、集车站联锁、区间虚拟闭塞和列车运行控制功能于一体的列控系统,通过卫星定位技术实现列车定位。增强型列车控制系统(ITCS)运行至今,虽然经过多次升级改造,但系统的列车定位精确度仍然不高。从青藏铁路自身技术发展、降低运维成本等方面考虑,采用定位性能良好的北斗卫星导航系统替代GPS实现列车的精确定位,具有很高的可行性。本文首先对青藏线的特殊情况以及国内外采用卫星导航技术实现列车定位的研究情况进行了介绍,明确了卫星导航系统融合多种传感器的组合定位方式是目前的研究方向。第二章对青藏线增强型列车控制系统(ITCS)的系统结构进行了介绍。第三章对北斗卫星导航系统的构成、建设情况及应用情况进行了介绍。重点阐述了铁路北斗地基增强系统的构成、工作流程以及建成北斗地基增强系统的特殊意义。第四章根据青藏线增强型列车控制系统(ITCS)的使用情况以及现有对基于GNSS的列车定位系统研究情况,设计了基于北斗的列车定位系统方案。并从定位精度、节约成本等方面对比了多种信息传感器的优缺点,最终选择了北斗卫星导航系统融合车速传感器的方选进行列车定位。第五章通过在青藏线搭建的实验平台对北斗卫星导航系统的定位性能进行了测试检验。仅就单北斗模式、多模融合和普通差分纠错模式下的北斗定位精度进行了测试,通过MATLAB软件打点显示,在采用普通差分纠错的模式下北斗卫星导航系统已经具备了与GPS相当的定位水平。最后,对本文的研究内容进行了总结分析。
[Abstract]:The Gela section of the Qinghai-Tibet Railway is located on the Qinghai-Tibet Plateau, with 84% of the section above the altitude of 4,000 m. The climatic conditions are very harsh, hypoxia, low temperature, heavy snow and so on. Therefore, research and development can reduce the amount of equipment maintenance and the working intensity of personnel. Train control system to improve transportation efficiency is an urgent need of Qinghai-Tibet Railway. The enhanced Train Control system (ITCS) is a train control system based on GSM-R wireless communication and satellite positioning technology, which integrates station interlocking, interval virtual block and train operation control functions. Up to now, the enhanced train control system (ITCS) has been upgraded many times, but the accuracy of the system is still not high. Considering the technical development of Qinghai-Tibet Railway and reducing the cost of operation and maintenance, it is feasible to use Beidou satellite navigation system with good positioning performance instead of GPS to realize the accurate positioning of trains. In this paper, the special situation of Qinghai-Xizang Line and the research of using satellite navigation technology to realize train positioning at home and abroad are introduced, and it is clear that the integrated positioning mode of satellite navigation system fusion with many sensors is the research direction at present. The second chapter introduces the system structure of the enhanced train control system (ITCS) on the Qinghai-Tibet Railway. The third chapter introduces the structure, construction and application of Beidou satellite navigation system. The construction, work flow and special significance of the Beidou foundation strengthening system are expounded. In the fourth chapter, according to the use of the enhanced train control system (ITCS) of the Qinghai-Tibet Railway and the existing research on the train positioning system based on GNSS, the scheme of the train positioning system based on Beidou is designed. The advantages and disadvantages of many kinds of information sensors are compared in terms of positioning accuracy and cost saving. Finally, the selection of speed sensor fusion speed sensor in Beidou satellite navigation system is selected for train positioning. In chapter 5, the positioning performance of Beidou satellite navigation system is tested by the experimental platform built on Qinghai-Tibet line. The positioning accuracy of Beidou in single Beidou mode, multi-mode fusion and ordinary differential error correction mode is tested, which is shown by MATLAB software. The Beidou satellite navigation system has the same positioning level as GPS in the common differential error correction mode. Finally, the research content of this paper is summarized and analyzed.
【学位授予单位】：中国铁道科学研究院
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TN967.1;U284.48

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