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Fast Compass Alignment for Strapdown Inertial Navigation System

Jin Sun1, Dengyin Zhang1, *, Xiaoye Shi1, Fei Ding1, 2

1 School of Internet of Things, Nanjing University of Posts and Telecommunication, Nanjing, 21003, China.
2 Department of Electronic and Electrical Engineering, University College London, London, WC1E 6BT, UK.

* Corresponding Author: Dengyin Zhang. Email: email.

Computers, Materials & Continua 2020, 65(2), 1349-1360.


Initial alignment is the precondition for strapdown inertial navigation system (SINS) to navigate. Its two important indexes are accuracy and rapidity, the accuracy of the initial alignment is directly related to the working accuracy of SINS, but in selfalignment, the two indexes are often contradictory. In view of the limitations of conventional data processing algorithms, a novel method of compass alignment based on stored data and repeated navigation calculation for SINS is proposed. By means of data storage, the same data is used in different stages of the initial alignment, which is beneficial to shorten the initial alignment time and improve the alignment accuracy. In order to verify the correctness of the compass algorithm based on stored data and repeated navigation calculation, the simulation experiment was done. In summary, when the computer performance is sufficiently high, the compass alignment method based on the stored data and the forward and reverse navigation calculation can effectively improve the alignment speed and improve the alignment accuracy.


Cite This Article

J. Sun, D. Zhang, X. Shi and F. Ding, "Fast compass alignment for strapdown inertial navigation system," Computers, Materials & Continua, vol. 65, no.2, pp. 1349–1360, 2020.

cc This work is licensed under a Creative Commons Attribution 4.0 International License , which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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