Integrity assurance of GNSS-based train integrated positioning system  

作　　者：LIU Jiang TANG Tao GAI BaiGen WANG Jian CHEN DeWang 

机构地区：[1]State Key Laboratory of Rail Traffic Control and Safety, Beijing Jiaotong University, Beijing 100044, China [2]School of Electronic and Information Engineering, Beifing Jiaotong University, Beijing 100044, China

出　　处：《Science China(Technological Sciences)》2011年第7期1779-1792,共14页中国科学（技术科学英文版）

基　　金：supported by the National Natural Science Foundation of China (Grant Nos. 60634010, 60736047, 60870016)

摘　　要：This paper presents a novel Autonomous Integrity Monitoring and Assurance （AIMA） scheme for integrity assurance of the GNSS-based train integrated positioning system. In this scheme, integrity assurance strategies are combined with a three-stage hierarchical architecture, considering the coupling effects among sensor collection, sensor fusion and matching decision level in train integrated positioning. In sensor collecting stage, the AIMA scheme deals with sensor faults and failures with a PCA-based fault detection, diagnosis and isolation approach. In multi-sensor fusion stage, a novel cubature point H0o filter is presented to enhance the fault tolerance capability, and a hybrid approach is applied to indicating and monitoring the protection level of position estimation, concerning both the estimating covariance and measurement slopes. In map matching stage, hypothesis testing with specific test statistic is carried out to determine effectiveness of positioning results. Position calculation will be invalid with an alarm triggered if the specific integrity criterion is not satisfied in any stage. Since independent solutions are applied in AIMA, integrity assurance is closely coupled with information processing in train integrated positioning. Numerical results of the three cases correspond to the hierarchical architecture with field data and simulations are presented to illustrate features and applicability of the proposed AIMA scheme and specific solutions.

关 键 词：train positioning integrated positioning GNSS integrity assurance 

分 类 号：TP212[自动化与计算机技术—检测技术与自动化装置] TN967.1[自动化与计算机技术—控制科学与工程]