[1] Lu Yuan, Cheng Xianghong,. Reference information time delay estimationand compensation in transfer alignment [J]. Journal of Southeast University (English Edition), 2011, 27 (1): 52-55. [doi:10.3969/j.issn.1003-7985.2011.01.011]

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Reference information time delay estimationand compensation in transfer alignment()

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Journal of Southeast University (English Edition)[ISSN:1003-7985/CN:32-1325/N]

Volumn:

27

Issue:

2011 1

Page:

52-55

Research Field:

Other Disciplines

Publishing date:

2011-03-30

Info

Title:

Reference information time delay estimationand compensation in transfer alignment

Author(s):

Lu Yuan;  Cheng Xianghong

School of Instrument Science and Engineering, Southeast University, Nanjing 210096, China
Key Laboratory of Micro-Inertial Instrument and Advanced Navigation Technology of Ministry of Education, Southeast University, Nanjing 210096, China

Keywords:

transfer alignment;  delay;  estimation;  compensation;  synchronization;  least squares;  curve fitting

PACS:

V241.62+2

DOI:

10.3969/j.issn.1003-7985.2011.01.011

Abstract:

To reduce the error in transfer alignment caused by reference information delay, a time delay estimation method is developed based on least-squares curve fitting of the angular rate integration. First, the gyro sensor measurements of the main strapdown inertial navigation system(M-SINS)and the slave strapdown inertial navigation system(S-SINS)are recorded for a few seconds and the integration of the data is calculated. Then, the possible maximum range of the delay value is defined and the points of the curve at different intervals are moved. The square of the differences between the corresponding points are calculated. Finally, the delay estimation can be acquired by the least-squares curve fitting of the M-SINS and the S-SINS. A delay compensation method by local data shifting is also presented. The simulation results demonstrate the effectiveness of delay estimation and indicate that the estimation accuracy is independent of the delay value. And the local data shifting compensation method can effectively reduce the errors of the transfer alignment caused by the reference information delay.

References:

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[2] Sun Hongwei, Li Zhigang, Li Huanxin, et al. Error estimation in two-way satellite time transfer[J]. Journal of Astronautic Metrology and Measurement, 2001, 21(2):55-58.(in Chinese)
[3] Ma Yunfeng, Zhou Bailing, Wan Zhengang, et al. Data synchronization and fusion method in MIMU/GPS integrated navigation system[J]. Journal of Chinese Inertial Technology, 2004, 23(3):28-31.(in Chinese)
[4] Talole S E, Ghosh A, Phadke S B. Proportional navigation guidance using predictive and time delay control[J]. Control Engineering Practice, 2006, 14(12): 1445-1453.
[5] Zhang Kaidong, Wu Meiping. A high accuracy time synchronization precept in SINS/GPS integrated navigation[J]. Control Technology of Tactical Missile, 2006, 6(4): 66-68.(in Chinese)
[6] Sun Changyue, Deng Zhenglong. Transfer alignment for harmonization of airborne sensors[C]//Proceedings of the 7th World Congress on Intelligent Control and Automation. Chongqing, China, 2008: 5004-5008.
[7] Wu Mei, Hou Yanze. A simple compensation method for adaptive time delay[J]. Flight Dynamics, 2008, 26(1):68-74.(in Chinese)
[8] Gu Dongjing, Qin Yongyuan. Airborne tactical weapon transfer alignment and accuracy evaluation technology[D]. Xi’an: Northwestern Polytechnical University, 2004.(in Chinese)

Memo

Memo:

Biographies: Lu Yuan(1981—), male, graduate; Cheng Xianghong(corresponding author), female, doctor, professor, xhcheng@seu.edu.cn.
Foundation items: The National Basic Research Program of China(973 Program)(No.613121030201), the Fundamental Research of Commission of Science, Technology and Industry for National Defense(No.C1420080224).
Citation: Lu Yuan, Cheng Xianghong. Reference information time delay estimation and compensation in transfer alignment[J].Journal of Southeast University(English Edition), 2011, 27(1):52-55.[doi:10.3969/j.issn.1003-7985.2011.01.011]

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