A real-time performance improvement method for composite time scale

doi:10.1088/1674-1056/ad6131

中国物理B ›› 2024, Vol. 33 ›› Issue (9): 90601-090601.doi: 10.1088/1674-1056/ad6131

A real-time performance improvement method for composite time scale

Fangmin Wang(王芳敏)^1,2, Wenlin Li(李汶林)^1,2, Hongfei Dai(戴鸿飞)^1,2, Chunyi Li(李春怡)^1,2, Jianhua Zhou(周建华)³, Shenhui Xue(薛申辉)³, and Bo Wang(王波)^1,2,†

1 State Key Laboratory of Precision Space-time Information Sensing Technology, Department of Precision Instrument, Tsinghua University, Beijing 100084, China;
2 Key Laboratory of Photonic Control Technology (Tsinghua University), Ministry of Education, Beijing 100084, China;
3 Beijing Satellite Navigation Center, Beijing 100094, China

收稿日期:2024-02-12 修回日期:2024-06-25 接受日期:2024-07-10 发布日期:2024-08-27
通讯作者: Bo Wang E-mail:bo.wang@tsinghua.edu.cn
基金资助:
Project supported in part by the National Key Research and Development Program of China (Grant No. 2021YFA1402102), the National Natural Science Foundation of China (Grant No. 62171249), and the Fund by Tsinghua University Initiative Scientific Research Program.

A real-time performance improvement method for composite time scale

Fangmin Wang(王芳敏)^1,2, Wenlin Li(李汶林)^1,2, Hongfei Dai(戴鸿飞)^1,2, Chunyi Li(李春怡)^1,2, Jianhua Zhou(周建华)³, Shenhui Xue(薛申辉)³, and Bo Wang(王波)^1,2,†

1 State Key Laboratory of Precision Space-time Information Sensing Technology, Department of Precision Instrument, Tsinghua University, Beijing 100084, China;
2 Key Laboratory of Photonic Control Technology (Tsinghua University), Ministry of Education, Beijing 100084, China;
3 Beijing Satellite Navigation Center, Beijing 100094, China

Received:2024-02-12 Revised:2024-06-25 Accepted:2024-07-10 Published:2024-08-27
Contact: Bo Wang E-mail:bo.wang@tsinghua.edu.cn
Supported by:
Project supported in part by the National Key Research and Development Program of China (Grant No. 2021YFA1402102), the National Natural Science Foundation of China (Grant No. 62171249), and the Fund by Tsinghua University Initiative Scientific Research Program.

摘要/Abstract

摘要： The composite time scale (CTS) provides a stable, accurate, and reliable time scale for modern society. The improvement 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 $\sim 1700 $ s. The experimental result proves that the CTS's real-time performance is significantly improved.

关键词: composite time scale, real-time performance, calculation interval, adjustment stage

Abstract: The composite time scale (CTS) provides a stable, accurate, and reliable time scale for modern society. The improvement 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 $\sim 1700 $ s. The experimental result proves that the CTS's real-time performance is significantly improved.

Key words: composite time scale, real-time performance, calculation interval, adjustment stage

中图分类号: (Time and frequency)

06.30.Ft

06.20.-f (Metrology)

Fangmin Wang(王芳敏), Wenlin Li(李汶林), Hongfei Dai(戴鸿飞), Chunyi Li(李春怡), Jianhua Zhou(周建华), Shenhui Xue(薛申辉), and Bo Wang(王波). A real-time performance improvement method for composite time scale[J]. 中国物理B, 2024, 33(9): 90601-090601.

参考文献

[1] Han C H, Yang Y X and Cai Z W 2011 Metrologia 48 S213
[2] Tavella P and Petit G 2020 Satell. Navig. 1 10
[3] Lisdat C, et al. 2016 Nat. Commun. 7 12443
[4] McGrew W F, Zhang X, Fasano R J, Schaffer S A, Beloy K, Nicolodi D, Brown R C, Hinkley N, Milani G, Schioppo M, Yoon T H and Ludlow A D 2018 Nature 564 87
[5] Zhang Z H, Gong S P, Dimitrovski A D and Li H S 2013 IEEE Trans. Smart Grid 4 87
[6] Moussa B, Debbabi M and Assi C 2016 IEEE Commun. Surv. Tutor. 18 1952
[7] Levine J 2011 Metrologia 48 S203
[8] Kolkowitz S, Pikovski I, Langellier N, Lukin M D, Walsworth, R L and Ye J 2016 Phys. Rev. D 94 124043
[9] Takamoto M, Ushijima I, Ohmae N, Yahagi T, Kokado K, Shinkai H and Katori H 2020 Nat. Photon. 14 411
[10] Matsakis D 2016 IEEE International Frequency Control Symposium, May 9-12, New Orleans, LA, USA, p. 6
[11] Peil S, Crane S, Hanssen J L, Swanson T B and Ekstrom C R 2013 Phys. Rev. A 87 010102
[12] Galleani L and Tavella P 2010 IEEE Control Syst. Mag. 30 44
[13] Tavella P and Thomas C 1991 Metrologia 28 57
[14] Wang F M, Chen Y F, Zhou J H, Lin Y T, Yang J, Wang B and Wang L J 2024 Chin. Phys. B 33 010702
[15] Liu Y, Xu B, Yin J, Shen D, Ouyang M J, Zheng Z H and Zhu X W 2022 Metrologia 59 035009
[16] Parker T E 2012 Rev. Sci. Instrum. 83 021102
[17] Guo Y C, Wang B, Wang F M, Shi F F, Zhang A M, Zhu X, Yang J, Feng K M, Han C H, Li T C and Wang L J 2019 Metrologia 56 045003
[18] Lee S W 2009 Metrologia 46 693
[19] Azoubib J, Nawrocki J and Lewandowski W 2003 Metrologia 40 S245
[20] Levine J 2008 Metrologia 45 S23
[21] Sherman J A, et al. 2021 NIST Technical Note 2187
[22] Liu Y, Xu B, Yin J, Shen D, Ouyang M J, Zheng Z H and Zhu X W 2022 Metrologia 59 035009
[23] Wang X B, Han C H and Yang Y X 2023 GPS Solut. 27 1
[24] Weiss M and Weissert T 1991 Metrologia 28 65
[25] Weiss M A, Allan D W and Peppler T K 1989 IEEE Trans. Instrum. Meas. 38 631
[26] Levine J 2012 Rev. Sci. Instrum. 83 021101
[27] Tavella P, Azoubib J and Thomas C 1991 Proceedings of the 5th European Frequency and Time Forum, March 12-14, Besançon, France, p. 435
[28] Ma F M 1984 Acta Metrol Sinica 5 28
[29] Wu Y W, Yang B, Xiao S H and Wang M L 2019 Geomatics and Information Science of Wuhan University 44 1226
[30] Tavella P and Premoli A 1994 Metrologia 30 479
[31] Torcaso F, Ekstrom C R, Burt E A and Matsakis D N 2000 IEEE Trans. Ultrason. Ferroelectr. Freq. Control 47 1183
[32] Guo Y C, Wang B, Wang F M, Si H W, Zuo Y N and Wang L J 2019 Joint Conference of the IEEE International Frequency Control Symposium and European Frequency and Time Forum (EFTF/IFCS), April 14-18, Orlando, FL, USA, p. 1
[33] Wang B, Gao C, Chen W L, Miao J, Zhu X, Bai Y, Zhang J W, Feng Y Y, Li T C and Wang L J 2012 Sci. Rep. 2 556

A real-time performance improvement method for composite time scale

A real-time performance improvement method for composite time scale

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