Analysis and compensation of disturbing gravity effect on long-endurance strap-down inertial navigation system

Abstract

Abstract: The effect of disturbing gravity vector on Strap-down Inertial Navigation System（SINS） errors is analyzed from the navigation calculation aspects. Then disturbing gravity model is established using the non-uniform B-spline least squares technology which can compensate for SINS. Simulation results show that the gravity modeling method has good precision, and the compensation for long-endurance SINS based on gravity model can reduce the SINS errors effectively.

Key words: strap-down inertial navigation system, disturbing gravity, compensation

摘要： 从捷联惯导系统导航解算出发，分析了重力扰动矢量对捷联惯导误差的影响，并根据非均匀B样条最小二乘法，对局部区域内的重力扰动进行二维逼近，建立重力扰动模型，进而对捷联惯导系统进行补偿。仿真结果表明，非均匀B样条建模方法具有很好的精度，利用建立的重力扰动模型对长航时捷联惯导进行补偿可以有效地减小惯导误差。

关键词: 捷联惯导系统, 重力扰动, 补偿

CONG Lin, ZHAO Zhong, YANG Xiaobu. Analysis and compensation of disturbing gravity effect on long-endurance strap-down inertial navigation system[J]. Computer Engineering and Applications, 2014, 50(11): 251-255.

丛琳，赵忠，杨小步. 长航时捷联惯导重力扰动影响及补偿[J]. 计算机工程与应用, 2014, 50(11): 251-255.

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Analysis and compensation of disturbing gravity effect on long-endurance strap-down inertial navigation system

长航时捷联惯导重力扰动影响及补偿

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