摘要
频率稳定度是铷原子钟计量测试中一项重要的技术指标。在对铷原子钟频率稳定度进行长期测试,并对测试数据进行分析研究的基础上,提出了一种基于抗差最小二乘法+改进Allan方差的频率稳定度计算方法,通过稳定的频率漂移补偿Allan方差中频率漂移造成的误差,用以减小传统频率稳定度计算方法中的测试误差,提高测试结果的准确性。以计量实验室实测的时差数据对该算法进行验证,结果表明该算法有效地降低铷原子钟稳定频率漂移对其频率稳定度的影响,可应用于铷原子钟的频率稳定度测量中。
Frequency stability is the most important parameter in the measurement characteristics of rubidium atomic clock.Based on research of the frequency stability of rubidium atomic clock,a calculation method combining robust least square and improved Allan variance is proposed.The error caused by frequency drift in Allan variance is compensated by stable frequency drift,and it is used to reduce the test error in the traditional frequency stability calculation method and to improve the accuracy of the test results.The algorithm is verified by the measured time deviation data in the metrology laboratory,and the results show that the algorithm can effectively derease the influence of stable frequency drift and can be used for the frequency stability measurement of atomic clock.
作者
史晓洋
张然
柳丹
阎栋梁
SHI Xiao-yang;ZHANG Ran;LIU Dan;YAN Dong-liang(Beijing Institute of Radio Metrology and Measurement,Beijing 100039,China)
出处
《时间频率学报》
CSCD
2022年第3期218-223,共6页
Journal of Time and Frequency
