【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。更多还原

【Abstract】 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.更多还原