一种原子钟组加权的优化策略  

An Optimized Weighting Method for Atomic Clock Ensemble

作　　者：于航 张磊 宋文霞 王玉琢[2] YU Hang;ZHANG Lei;SONG Wen-xia;WANG Yu-zhuo(Department of Artificial Intelligence and Data Science,Hebei University of Technology,Tianjin 300130,China;National Institute of Metrology,Beijing 100029,China)

机构地区：[1]河北工业大学人工智能与数据科学学院,天津300401 [2]中国计量科学研究院,北京100029

出　　处：《计量学报》2022年第4期536-541,共6页Acta Metrologica Sinica

基　　金：国家重点研究计划(2016YFF0200203);国家自然科学基金(61905231)。

摘　　要：原子钟组集成技术广泛应用于计时系统中,以保持原子时标的准确性、稳定性和连续性。相同环境下的原子钟之间可能存在一定的相关性,这在一定程度上限制了原子时标性能。从原子钟组与其协方差矩阵的相关性出发,考察了相同环境因素对原子钟频率特性的影响,基于正则化理论设计了一种原子钟组加权方法。将该方法应用于中国计量科学研究院铯钟组,实验表明有效降低了原子钟组的输出频率不稳定性。Atomic clock group integration technology is widely used in time keeping systems to maintain the accuracy,stability and continuity of time scale.However,there is always a certain correlation between atomic clocks in the same laboratory,which limits the performance of atomic time scales.Based on the correlation between the atomic clock ensemble and its covariance matrix,this paper investigates the influence of same environmental factors on the frequency characteristics of atomic clock.A new weighting method for atomic clock ensemble is designed with optimization theory.It was applied to the cesium clock ensemble at NIM.The results showed the new method could reduce greatly the frequency instability of the clock ensemble.

关 键 词：计量学 原子钟组 原子时标 协调世界时 优化加权 

分 类 号：TB939[一般工业技术—计量学]