摘要
大型通信、测量电子系统一般配备2台或2台以上原子钟作为系统的时间、频率基准,互为备份构建主、备时频信号基准,以提高系统时频信号可靠性,保障系统连续运行。主备原子钟间虽然可通过相位比对、数据分析检测到原子钟工作状态异常状况,但是由于缺乏参考,难以通过时频系统本身区分故障来源,存在故障定位难的技术难点。针对这一问题,提出了一种基于中间振荡器的主、备用原子钟频率跳变检测、短期稳定度分析评估方法,为时频系统主、备用原子钟故障定位提供技术手段,提高时频系统故障判断准确性,并缩减系统故障定位、故障恢复时间。使用3台铷原子钟进行了测试验证,实验结果表明,该方法可实现时钟稳定度的评估,并可实现时钟频率跳变的故障定位。
Large-scale communication and measurement systems normally have two or more atomic clocks to form a master-slave time and frequency reference,which increases the system reliability and ensures continuous operation. Although the abnormal state of master and slave clocks can be detected by measuring their phase difference,but it’ s hard to identify the source of fault due to the lack of external reference. In order to solve this problem,the paper proposes a master-slave clock frequency jump detection and stability eval-uation method based on middle oscillator. This method can improve the fault detection accuracy of time frequency system and reduce the fault location and recovery time. Three Rb clocks are used in experiment to verify this method,and the result shows that the method can successfully evaluate the clock stability and identify the fault source.
出处
《无线电工程》
2018年第1期46-49,共4页
Radio Engineering
基金
中国电子科技集团公司航天信息应用技术重点实验室基金资助项目(EX156290055)
关键词
原子钟评估
稳定度评估
频率跳变检测
atomic clock evaluation
stability evaluation
frequency jump detection
