摘要
传统T-RAIM算法对微小缓变等故障检测能力弱,对可见星数量也有一定要求,其可用性有所降低,导致北斗定时接收机应用受限。结合快照法和滤波法在故障检测上各自的优势,提出一种改进的T-RAIM算法。通过不同卫星故障场景的仿真验证表明该算法可检测最小故障偏差在37ns左右,可见星少场景下也可识别故障卫星,能够提供更好的定时完好性服务。
Traditional receiver autonomous integrity monitoring algorithm （T-RAIM） is weak in detecting weak and slowly changing faults, and the number of visible satellites is also certainly required. It leads to limited application of BeiDou timing receiver. Combined the advantages of the snapshot method and the filtering method in fault detection, an improved T-RAIM algorithm is proposed. According to simulation verification of different satellite failure scenarios, this algorithm can detect the minimum fault deviation about 37 ns,and identify fault satellites in the case of less visible satellites. It can provide better timing integrity services.
作者
徐荣
周同同
赵陆文
戴卫恒
田世伟
XU Rong;ZHOU Tong-tong;ZHAO Lu-wen;DAI Wei-heng;TIAN Shi-wei(Institute of Communication Engineering,Army Engineering University of PLA,Nanjing 210007,China;Jiangsu Compass Navigation and Communication Technology Corporation Limited,Nanjing 210007,China)
出处
《时间频率学报》
CSCD
2018年第3期228-233,共6页
Journal of Time and Frequency
关键词
定时接收机
自主完好性
故障识别
告警时间
timing receiver
receiver autonomous integrity monitoring （RAIM）
fault identification
alarm time
