Comparison of geomagnetic aided navigation algorithms for hypersonic vehicles
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Journal of Zhejiang University-SCIENCE A (Applied Physics & Engineering) ISSN 1673-565X (Print); ISSN 1862-1775 (Online) www.jzus.zju.edu.cn; www.springerlink.com E-mail: [email protected]
Comparison of geomagnetic aided navigation algorithms for hypersonic vehicles* Kai CHEN†, Wen-chao LIANG, Ming-xin LIU, Han-yan SUN School of Astronautics, Northwestern Polytechnical University, Xi’an 710072, China †
E-mail: [email protected]
Received Dec. 27, 2019; Revision accepted Mar. 16, 2020; Crosschecked July 21, 2020
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. Key words: Geomagnetic navigation; Contour; Geomagnetic elements; Integrated navigation; Kalman filter https://doi.org/10.1631/jzus.A1900648 CLC number: V44
1 Introduction Near space refers to the airspace within an altitude of 20–100 km. Compared with traditional aeronautical space, near space can provide more abundant information, faster communication, and more accurate resolution (Chen, 2017; Wang et al., 2018; Wen et al., 2019). In virtue of their high velocity, large scope of activities, fast responses, cross space operation capability, and good invisibility and elusiveness, near space hypersonic vehicles can present extraordinary advantages in military applications and have become a hot topic of study (Li et al., 2017; Lv et al., 2017; Liao et al., 2018; Wang YY et al., 2019). *
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) ORCID: Kai CHEN, https://orcid.org/0000-0002-2586-7546 © Zhejiang University and Springer-Verlag GmbH Germany, part of Springer Nature 2020
Currently, the navigation of hypersonic vehicles relies on the strapdown inertial navigation system (SINS) and global navigation satellite system (GNSS), which are limited by poor concealment because the reception of electromagnetic signals by the satellite positioning system requires a receiver (Monte
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