星载原子钟自主完好性监测方法研究  

A Study on Onboard Satellite Atomic Clock Autonomous Integrity Monitoring

作　　者：唐升[1,2,3,4] 刘娅[1,2] 李孝辉[1,2] 

机构地区：[1]中国科学院国家授时中心,西安710600 [2]中国科学院时间频率基准重点实验室,西安710600 [3]西北大学信息科学与技术学院,西安710127 [4]中国科学院研究生院,北京100190

出　　处：《宇航学报》2013年第1期39-45,共7页Journal of Astronautics

基　　金：国家自然科学基金重点项目(11033004);国家自然科学基金青年基金项目(61001076)

摘　　要：针对地基辅助系统监测星载原子钟的完好性时呈现出的对地面依赖程度高、故障告警及时性差的缺点,分析了星载原子钟常见异常现象及其对系统性能的影响,提出了一种基于差拍数字化测频和最小二乘法钟差预测比较的星载原子钟自主完好性监测解决方案。实验验证了该方案的可行性,针对星载原子钟故障能够在1秒内做出准确判断并发出告警信息。The problem of the onboard satellite atomic clock integrity monitoring is considered in this paper.The conventional method of ground-based augmentation system has the drawbacks of high dependence on the ground and poor timeliness of failure alarm.According to the analysis of common failure modes of the onboard satellite atomic clock and the consequent influences on the system performance,an onboard satellite atomic clock autonomous integrity monitor scheme based on digital sin-beat frequency measurement and least square clock difference prediction is proposed.The experiment results verify the improvement of the proposed scheme and show that the onboard satellite atomic clock signal anomaly detecting and alerting can be completed in one second.

关 键 词：导航卫星 星载原子钟 自主完好性监测 及时告警 

分 类 号：TM935.1[电气工程—电力电子与电力传动]