Vehicle gravity anomaly measurement methods based on SINS/OD/altimeter

被引：3
作者：
Li, Xinyu [1 ,2 ]
Zhang, Zhili [1 ,2 ]
Zhou, Zhaofa [1 ,2 ]
Chang, Zhenjun [1 ,2 ]
Zhao, Zhiqian [1 ,2 ]
机构：
[1] School of Missile Engineering, Rocket Force University of Engineering, Xi’an
[2] State Key Discipline Laboratory of Armament Launch Theory and Technology, Rocket Force University of Engineering, Xi’an
来源：
Beijing Hangkong Hangtian Daxue Xuebao/Journal of Beijing University of Aeronautics and Astronautics | 2024年 / 50卷 / 10期
关键词：
barometric altimeter; direct difference method; gravity anomaly; odometer; vehicle gravimetry;
D O I：
10.13700/j.bh.1001-5965.2022.0766
中图分类号：
学科分类号：
摘要：
Vehicle gravimetry is carried out along the surface of the earth. Its slow speed and flexible maneuverability can provide favorable conditions for high-precision ground gravimetry. Due to its heavy dependence on the global positioning system (GPS), traditional gravimetry on a moving pedestal cannot achieve complete autonomy. A new autonomous passive method based on strapdown inertial navigation system (SINS)/odometer (OD)/altimeter integrated navigation was proposed to measure vehicle gravity anomaly. The integrated navigation system provided high-precision specific force, attitude, and carrier acceleration. The barometric altimeter was used to suppress the divergence of the altitude channel, and the gravity information could be obtained by the direct difference method. Then, the measurement accuracy of the four methods, namely, position (SINS/DR), velocity (SINS/OD), position velocity (SINS/DR/OD), and traditional SINS/GPS, was compared, and the influence of measurement selection on the measurement effect of the method proposed was analyzed. The results of repeated measurement line simulation and single measurement line vehicle experiment show that the method proposed can achieve fully autonomous vehicle gravity anomaly measurement, and it has general accuracy advantages over the traditional SINS/GPS method. In addition, the SINS/OD and SINS/DR/OD measurement accuracy is not much different and is better than the SINS/DR measurement method. © 2024 Beijing University of Aeronautics and Astronautics (BUAA). All rights reserved.
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页码：3162 / 3171
页数：9
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