首页|A real-time performance improvement method for composite time scale

A real-time performance improvement method for composite time scale

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The composite time scale(CTS)provides a stable,accurate,and reliable time scale for modern society.The im-provement of CTS's real-time performance will improve its stability,which strengths related applications'performance.Aiming at this goal,a method achieved by determining the optimal calculation interval and accelerating adjustment stage is proposed in this paper.The determinants of the CTS's calculation interval(characteristics of the clock ensemble,the measurement noise,the time and frequency synchronization system's noise and the auxiliary output generator noise floor)are studied and the optimal calculation interval is obtained.We also investigate the effect of ensemble algorithm's initial parameters on the CTS's adjustment stage.A strategy to get the reasonable initial parameters of ensemble algorithm is designed.The results show that the adjustment stage can be finished rapidly or even can be shorten to zero with reasonable initial parameters.On this basis,we experimentally generate a distributed CTS with a calculation interval of 500 s and its stability outperforms those of the member clocks when the averaging time is longer than～1700 s.The experimental result proves that the CTS's real-time performance is significantly improved.

composite time scalereal-time performancecalculation intervaladjustment stage

王芳敏、李汶林、戴鸿飞、李春怡、周建华、薛申辉、王波

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State Key Laboratory of Precision Space-time Information Sensing Technology,Department of Precision Instrument,Tsinghua University,Beijing 100084,China

Key Laboratory of Photonic Control Technology(Tsinghua University),Ministry of Education,Beijing 100084,China

Beijing Satellite Navigation Center,Beijing 100094,China

National Key Research and Development Program of ChinaNational Natural Science Foundation of ChinaFund by Tsinghua University Initiative Scientific Research Program

2021YFA140210262171249

2024

10.1088/1674-1056/ad6131

中国物理B(英文版)
中国物理学会和中国科学院物理研究所

中国物理B(英文版)

CSTPCDEI
影响因子：0.995
ISSN：1674-1056
年,卷(期)：2024.33(9)