A Correction Algorithm for Course Errors from the Gyrocompass Along the Northeast Channel of the Arctic

WU Jianhua; DU Wei; WANG Chen; FU Peng; NIE Genzheng; JIANG Xinbo

doi:10.3963/j.jssn.1674-4861.2021.06.009

Volume 39 Issue 6

Dec. 2021

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Article Navigation > Journal of Transport Information and Safety > 2021 > 39(6): 73-81

WU Jianhua, DU Wei, WANG Chen, FU Peng, NIE Genzheng, JIANG Xinbo. A Correction Algorithm for Course Errors from the Gyrocompass Along the Northeast Channel of the Arctic[J]. Journal of Transport Information and Safety, 2021, 39(6): 73-81. doi: 10.3963/j.jssn.1674-4861.2021.06.009

Citation:

WU Jianhua, DU Wei, WANG Chen, FU Peng, NIE Genzheng, JIANG Xinbo. A Correction Algorithm for Course Errors from the Gyrocompass Along the Northeast Channel of the Arctic[J]. Journal of Transport Information and Safety, 2021, 39(6): 73-81. doi: 10.3963/j.jssn.1674-4861.2021.06.009

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A Correction Algorithm for Course Errors from the Gyrocompass Along the Northeast Channel of the Arctic

doi: 10.3963/j.jssn.1674-4861.2021.06.009

WU Jianhua^{1, 2
,
,},
DU Wei^{1, 2},
WANG Chen³,
FU Peng^{1, 2},
NIE Genzheng^{1, 2},
JIANG Xinbo^{1, 2}

1.
School of Navigation, Wuhan University of Technology, Wuhan 430063, China
2.
Hubei Key Laboratory of Inland Shipping Technology, Wuhan University of Technology, Wuhan 430063, China
3.
Transport Planning and Research Institute, Ministry of Transport, Beijing 100028, China

Received Date: 2021-08-06
Available Online: 2022-01-12

Abstract

Abstract

This work focuses on the problem of the decreased pointing accuracy caused by the reduced pointing torque in high latitudes when the gyrocompass commonly used on merchant ship is navigated in the Northeast Passage of the Arctic. Based on the historical data of the Northeast Passage of the Arctic, the influences of latitude and heading on heading error are considered. The least-square method is used to fit the heading error of GPS satellite compass and gyrocompass by the polynomial. Three fitting models are established to select the gyrocompass heading correction model with the smallest mean square error. When the GPS signal is abnormal, the model is used to correct the heading error of the gyrocompass. After correction, the accuracy of the gyrocompass heading remains within ±2.0°, and the correction rate within ±1° reaches 88.4%. When the GPS signal is normal, the Kalman filter is used for the second correction based on the first correction. The correction rate of the corrected gyrocompass heading accuracy within ±1.0° is 98.9%, and that within ±0.5° is 88.9%.
- Northeast Passage of the Arctic,
- gyrocompass,
- heading error,
- data fitting,
- the least-square method,
- Kalman filter,

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References(20)

References

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