| 摘要: |
| 针对新型列控系统向着“车载中心化”的方式发展对列车完整性检查系统功能实现安全冗余的需求，在既有列尾设备检测风压提醒司机判定列车完整性功能的基础上，提出增加基于卫星的测速定位配合车载设备实施列车完整性检查，以保障列车完整性检查功能的可靠性和可用性。由于列尾设备安装条件限制，观测环境场景为典型的“半边天”场景，因此对列尾设备进行性能测试。基于浩吉重载铁路35.35 km的实测数据，采用电磁仿真软件进行列尾天线方向性设计，使用卫星导航模拟器构建仿真测试场景和设计测试序列，对列尾设备的定位性能进行了评估。评估结果表明，列尾设备在设计的天线方向图场景下观测参数和定位性能参数均符合典型的“半边天”场景特征；区间动态运行仿真结果，定位精度R95评估结果在BDS模式下为13.48 m，GPS模式下为9.12 m，BDS/GPS模式下为3.82 m，基于BDS/GPS的双模定位模式在车站停车、区间运行等场景下定位精度R95均优于4 m，表明采用双模定位方式能够满足列车完整性检查列尾设备定位精度小于5 m的要求。 |
| 关键词: 性能测试 卫星导航仿真 列尾设备 列车运行控制系统 列车定位 |
| DOI： |
|
| 基金项目:国家自然科学基金（62027809）；北京市自然科学基金（L211004）；国家重点研发计划（2022YFB4300500）；国家自然科学基金委员会-中国国家铁路集团有限公司铁路基础研究联合基金(U2268206)；北京市自然科学基金（4232031） |
|
| End-of-train device performance test method by GNSS-based train integrity monitoring system |
| LU Debiao,SUN Hao,ZHANG Dan,DUAN Guotao,DONG Haoqi |
| (School of Electronic and Information Engineering, Beijing Jiaotong University, Beijing, 100044, China; Frontiers Science Center for Smart High-speed Railway System, Beijing, 100044, China; Beijing Engineering Research Center of EMC and GNSS Technology for Rail Transportation, Beijing Jiaotong University, Beijing 100044, China;School of Electronic and Information Engineering, Beijing Jiaotong University, Beijing, 100044, China; Beijing Engineering Research Center of EMC and GNSS Technology for Rail Transportation, Beijing Jiaotong University, Beijing 100044, China) |
| Abstract: |
| In view of the development of the Next Generation Train Control (NGTC) towards ″on-board centric″ approach, the train integrity monitoring system (TIMS) needs to achieve safety redundancy. Existing End-of-Train (EOT) devices detect wind pressure and remind the driver the integrity of the train. On this basis, adding GNSS-based EOT is proposed to implement reliability and availability of TIMS. Due to the limited installation conditions of EOT, the observation environment scenario is the typical ″half sky″. Performance tests of the end-of-train devices are therefore necessary. Based on the field collected data of 35.35 kilometers along Haoji Heavy-haul Railway, the antenna radiation pattern of the EOT antenna is designed using HFSS. Simulation test scenarios and design test sequences are built using satellite navigation simulators, and EOT localization performance is analyzed. The evaluation results show that the observation and performance parameters of EOT in the designed antenna pattern array are in line with the ″half sky″ characteristics;and the dynamic operation simulation points out that, the positioning accuracy results with R95 evaluation are 13.48 m in BDS mode, 9.12 m in GPS mode, and 3.82 m in BDS/GPS mode. The accuracy with R95 of the BDS/GPS mode is better than 4 m in scenarios such as in station and in block operations, which shows that the BDS/GPS mode positioning meet the requirement of less than 5 m positioning accuracy of EOT for TIMS. |
| Key words: Performance test GNSS simulation End-of-train device Train control system Train localization |
