A single-axis rotation modulation strapdown gravity vector measurement method considering scale factor

Caixia Ma; Bainan Yang; Tianyi Xie; Juliang Cao; Guo Yan; Shaokun Cai

doi:10.1117/12.2667266

10 February 2023 A single-axis rotation modulation strapdown gravity vector measurement method considering scale factor

Caixia Ma, Bainan Yang, Tianyi Xie, Juliang Cao, Guo Yan, Shaokun Cai

Author Affiliations +

Proceedings Volume 12552, International Conference on Geographic Information and Remote Sensing Technology (GIRST 2022); 125521P (2023) https://doi.org/10.1117/12.2667266
Event: International Conference on Geographic Information and Remote Sensing Technology (GIRST 2022), 2022, Kunming, China

Abstract

Aiming at the problem that the single-axis rotation modulation technology is currently used in gravity measurement, only considering the inertial device's zero bias will restrict gravity measurement accuracy, a single-axis rotation modulation strapdown gravity vector measurement method considering the scale factor error is proposed. This method analyzes the one-way continuous rotation scheme and finds that the up-direction scale factor error stimulates additional attitude errors. To suppress the error and improve the measurement accuracy of the strapdown gravity vector, a dual-position forward and reverse turn-and-stop scheme is adopted, which designs a reasonable rotation path, stop position, and time. The simulation results show that the dual-position forward and reverse turn-and-stop scheme, considering the scale factor, can effectively improve the accuracy of gravity measurement compared with the one-way continuous rotation scheme. This study has great technical reference significance and engineering practice significance and can meet the needs of high-precision airborne and marine gravity measurement.

Citation Download Citation

Caixia Ma, Bainan Yang, Tianyi Xie, Juliang Cao, Guo Yan, and Shaokun Cai "A single-axis rotation modulation strapdown gravity vector measurement method considering scale factor", Proc. SPIE 12552, International Conference on Geographic Information and Remote Sensing Technology (GIRST 2022), 125521P (10 February 2023); https://doi.org/10.1117/12.2667266

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KEYWORDS

Modulation

Error analysis

Gyroscopes

Accelerometers

Defense technologies

Navigation systems

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