Abstract
In this paper, we simulate, verify, and compare the performance of three classical geomagnetic matching aided navigation algorithms to assess their applicability to hypersonic vehicle navigation. Firstly, we introduce the various sources of the geomagnetic field. Secondly, we describe the principles and processes of the geomagnetic contour matching (MAGCOM) algorithm, iterative closest contour point (ICCP) algorithm, and Sandia inertial magnetic aided navigation (SIMAN) algorithm. Thirdly, we discuss the principles of inertial/geomagnetic integrated navigation, and propose the state and observation equations of integrated navigation. Finally, we perform a simulation of inertial/geomagnetic integrated navigation on the hypersonic boost-glide vehicle trajectory. The simulation results indicate that the real-time performance of the SIMAN algorithm can be optimized such that the matching accuracy is higher than that of the other two algorithms. At the same time, the SIMAN algorithm can achieve better stability, and though the amount of measurement noise can be larger, it can still achieve good positioning accuracy.
概要
目的
验证三种经典的地磁匹配辅助导航算法在临近空 间高超声速飞行器导航中的适用性. 探讨和比较 地磁轮廓匹配(MAGCOM)、沿等值线最近点迭 代(ICCP)和桑迪亚地磁辅助导航(SIMAN)算 法在助推-滑翔高超声速飞行器导航中的实时性、 稳定性和定位精度.
创新点
比较分析助推-滑翔高超声速飞行器上的三种地磁 匹配算法, 并讨论其适用性.
方法
1. 分析地球磁场组成部分的时变特性, 并选取地 球主磁场作为地磁匹配辅助导航的地磁基准图. 2. 根据三种地磁匹配算法的原理, 分别总结出三 种算法的流程和步骤; 根据惯性/地磁组合导航的 原理, 给出组合导航的状态方程和观测方程. 3. 根据世界地磁场模型(WMM)得出地磁基准 图, 并在简化的助推-滑翔飞行器弹道上对三种算 法在不同的磁误差条件下进行仿真验证和比较.
结论
1. 在磁误差很小的情况下, SIMAN 算法和 MAGCOM 算法的定位精度都很高; 在磁误差较 大的情况下, SIMAN 算法的精度最高. 2. SIMAN 算法的稳定性最好, 而MAGCOM 算 法的稳定性最差. 3. SIMAN 算法的实时性最好, 而ICCP 算法的实时性最差.
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Kai CHEN designed the research. Wen-chao LIANG processed the corresponding data and wrote the first draft of the manuscript. Ming-xin LIU helped to organize the manuscript. Han-yan SUN revised and edited the final version.
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Kai CHEN, Wen-chao LIANG, Ming-xin LIU, and Han-yan SUN declare that they have no conflict of interest.
Project supported by the Space Science and Technology Innovation Fund of China (No. 2016KC020028) and the Fund of China Space Science and Technology (No. 2017-HT-XG)
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Chen, K., Liang, Wc., Liu, Mx. et al. Comparison of geomagnetic aided navigation algorithms for hypersonic vehicles. J. Zhejiang Univ. Sci. A 21, 673–683 (2020). https://doi.org/10.1631/jzus.A1900648
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DOI: https://doi.org/10.1631/jzus.A1900648