Research on An Optimized Frequency Steering Algorithm

Shuhong ZHAO; Shaowu DONG; Shanshan BAI; Zhe GAO

doi:10.11999/JEIT190980

Volume 43 Issue 5

May 2021

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Shuhong ZHAO, Shaowu DONG, Shanshan BAI, Zhe GAO. Research on An Optimized Frequency Steering Algorithm[J]. Journal of Electronics & Information Technology, 2021, 43(5): 1457-1464. doi: 10.11999/JEIT190980

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Shuhong ZHAO, Shaowu DONG, Shanshan BAI, Zhe GAO. Research on An Optimized Frequency Steering Algorithm[J]. Journal of Electronics & Information Technology, 2021, 43(5): 1457-1464. doi: 10.11999/JEIT190980

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Research on An Optimized Frequency Steering Algorithm

doi: 10.11999/JEIT190980

Shuhong ZHAO^{1, 2},
Shaowu DONG^{1, 2, 3, 4
,
,},
Shanshan BAI^{1, 2},
Zhe GAO^{1, 2}

1.
National Time Service Center, CAS, Xi’an 710600, China
2.
Key Laboratory of Time and Frequency Primary Standards, National Time Service Center, CAS, Xi’an 710600, China
3.
University of Chinese Academy of Sciences, Beijing 100049, China
4.
School of Astronomy and Space Science, UCAS, Beijing 100049, China

Funds: The National Natural Science Foundation of China (11773030), The Youth Innovation Promotion Association Foundation of the Chinese Academy of Sciences(2020402)

Received Date: 2019-11-20
Rev Recd Date: 2020-11-17

Available Online: 2020-12-03

Publish Date: 2021-05-18

Abstract

Abstract

In order to meet the increasing demands for the performance of time in various application fields, an optimized frequency steering algorithm is designed and implemented in this paper, which is mainly divided into two parts: paper time scale calculation and physical signal implementation. ALGOS algorithm is adopted for the paper time scale calculation, and then an accurate and reliable time scale is calculated by using real-time atomic clock data and Circular T data, which ensures the accuracy and real-time steering reference scale. Real-time physical signals are implemented using an optimal Linear Quadratic Gaussian (LQG) control algorithmand and Kalman algorithm. By adjusting parameters in real time, the optimal frequency steering value is generated, this value is sent to the frequency adjustment device, and finally the output of the high-precision time signal is realized. The entire steering system is closed-loop. Based on time keeping system and atomic clock assemble, a test platform is built, and the algorithm is used to perform a 140 days frequency steering on a hydrogen maser clock, and finally the performance evaluation of the output physical signal is performed. Experimental results show that this algorithm improves effectively the accuracy and stability of the output physical signal. Compared with Universal Time Co-ordinated (UTC), the output time signal maintains a time deviation within ± 3 ns, and its stability is better than 5×10^–16 at 30 days.
- High precision time,
- Time scale,
- Time keeping,
- Frequency steering,
- Kalman algorithm,
- Linear quadratic Gaussian control algorithm

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References(21)

References

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