机动状态下国产铯原子钟稳定性分析  

Analysis of frequency stability of home-made cesium clocks in maneuver state

作　　者：崔海波 王伟[3] 武建锋 李帅辰[1,4] 李冲 王康 CUI Hai-bo;WANG Wei;WU Jian-feng;LI Shuai-chen;LI Chong;WANG Kang(National Time Service Center,Chinese Academy of Sciences,Xi’an 710600,China;Chinese People’s Liberation Army 91034 Unit,Xuancheng 242056,China;College of Electrical and Electronic Engineering,University of Chinese Academy of Sciences,Beijing 101408,China;College of Integrated Circuits,University of Chinese Academy of Sciences,Beijing 101408,China;Beijing Satellite Navigation Center,Beijing 100094,China)

机构地区：[1]中国科学院国家授时中心,西安710600 [2]中国人民解放军91034部队,宣城242056 [3]中国科学院大学电子电气与通信工程学院,北京101408 [4]中国科学院大学集成电路学院,北京101408 [5]北京卫星导航中心,北京100094

出　　处：《时间频率学报》2024年第1期26-33,共8页Journal of Time and Frequency

基　　金：中国科学院青年创新促进会优秀会员项目。

摘　　要：车载机动状态下的守时系统可以满足一些特殊应用场合的实际需求,其核心部分便是原子钟。主要利用守时车辆在三级道路上移动前后的数据,分析了国产小型铯原子钟在无溯源车载机动状态下的动态Allan标准偏差(ADEV)以及噪声的幂律谱,为未来国产小型铯原子钟的移动应用提供支撑。结果表明,铯原子钟车载机动状态对铯原子钟的频率稳定度有一定的影响,ADEV的采样时间τ为1~1000 s频率稳定度最大恶化了1.15×10^(-11),恶化约一个数量级;采样时间τ≥1000 s稳定度恶化相对较小,最大恶化了8.74×10^(-13),恶化一倍左右。在噪声方面,铯原子钟机动状态主要受到白色调相噪声的影响。The timekeeping system in the maneuvering can meet the actual needs of some special applications,and the core part of the mobile timekeeping system is the atomic clock.This article mainly used the data before and after in-vehicle mobile timekeeping moves on the third-class road,analysis of the dynamic Allan deviation(ADEV)and power-law spectrum of the noise of the home-made small cesium atomic clock in the vehicle-mounted maneuver state without traceability and provide support for mobile applications of home-made small cesium atomic clocks in the future.The results show that the maneuvering state of the cesium atomic clock has a certain influence on the frequency stability of the cesium atomic clock,the sampling timeτof Allan deviation is 1~1000 s,and the maximum frequency stability deteriorates by 1.15×10^(-11),which is about an order of magnitude worse;the deterioration of the stability of the sampling timeτ≥1000 s is relatively small,and the maximum is 8.74×10^(-13),which is about twice deteriorated.The maneuver state of the cesium atomic clock is mainly affected by the phase modulation white noise.

关 键 词：车载可搬移守时 铯原子钟 动态Allan标准偏差 幂律谱 

分 类 号：TH714.14[机械工程—测试计量技术及仪器]