基于GPS定位的列车完整性检查研究

发布时间：2019-06-07 07:18

【摘要】：随着铁路列控技术的发展，目前普遍认同的是发展CBTC(Communication BasedTrain Control,基于通信的列车控制系统)。CBTC中列车完整性检查是关系到系统安全性的一个关键环节。在没有轨道电路的情况下，，如何利用车载设备进行列车完整性检查将成为一个新的需要解决的问题，所以研究一种新型的列车完整性检查方法具有重要的理论价值和实际意义。随着通信、网络、计算机等技术的发展，一些先进的技术也逐步应用到铁路运输中。而以GPS(Global Positioning System,全球卫星定位系统)为代表的GNSS(Global Naviga-tion Satellite System,全球卫星导航系统)定位技术也越来越多的应用到铁路领域当中。目前将GPS运用于列车完整性检查还没有成熟的理论，它通常和列尾装置结合构成一个冗余的完整性检查系统。在列车行驶过程中，在列车尾部车钩安装的GPS天线容易被车厢遮挡，在少于4颗卫星的情况下(GPS不完备条件下)常规卫星定位方法受到限制，无法实现利用GPS进行列车完整性检查。因此本论文利用车头完全定位且与车尾通信保持畅通的特点，提出了一种新的列车完整性检查方法，该方法是建立在GPS不完备条件下卫星定位算法基础上的。三星算法的核心思想是结合车头定位信息建立一颗虚拟卫星，从而增加一个约束方程，然后与可视卫星构成的方程联立，从而实现车尾定位解算。即使在GPS正常工作期间，本算法仍然可以作为一个相当有价值的补充。最后利用车头和车尾的位置信息实时地测算车长变化，从而实现检查列车完整性的目的。论文对算法进行了详细的数学推导，并设计了GPS列车完整性检查算法模拟软件，通过实验进行了算法验证，其定位精度较高，满足列车完整性检查的要求。
[Abstract]:With the development of railway train control technology, it is generally accepted that the train integrity inspection in CBTC (Communication BasedTrain Control, communication-based train control system). CBTC is a key link related to the safety of the system. In the absence of track circuit, how to use on-board equipment for train integrity inspection will become a new problem to be solved, so it is of great theoretical and practical significance to study a new train integrity inspection method. With the development of communication, network, computer and other technologies, some advanced technologies are gradually applied to railway transportation. GNSS (Global Naviga-tion Satellite System, Global Satellite Navigation system (GNSS (Global Naviga-tion Satellite System,), represented by GPS (Global Positioning System, Global Positioning system (GPS), is more and more used in railway field. At present, there is no mature theory that GPS is applied to train integrity check. It is usually combined with train tail device to form a redundant integrity inspection system. In the course of train running, the GPS antenna installed at the rear hook of the train is easily obscured by the car, and the conventional satellite positioning method is limited under the condition of less than four satellites (GPS is incomplete). It is impossible to use GPS to carry out train integrity inspection. Therefore, based on the characteristics of complete front positioning and smooth communication with the rear, a new train integrity inspection method is proposed in this paper, which is based on the satellite positioning algorithm under the condition of incomplete GPS. The core idea of Samsung algorithm is to establish a virtual satellite combined with the front positioning information, so as to add a constraint equation, and then go hand in hand with the equation composed of visual satellite, so as to realize the solution of rear positioning. Even during the normal operation of GPS, this algorithm can still be used as a valuable supplement. Finally, the position information of the front and rear is used to measure the change of the vehicle length in real time, so as to realize the purpose of checking the integrity of the train. In this paper, the algorithm is deduced in detail, and the simulation software of GPS train integrity inspection algorithm is designed. The algorithm is verified by experiments, and its positioning accuracy is high, which meets the requirements of train integrity inspection.
【学位授予单位】：兰州交通大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：U284.48;P228.4

【参考文献】