An In-Flight Alignment Method for Global Positioning System-Assisted Low Cost Strapdown Inertial Navigation System in Flight Body with Short-Endurance and High-Speed Rotation
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Published:2023-01-25
Issue:3
Volume:15
Page:711
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ISSN:2072-4292
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Container-title:Remote Sensing
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language:en
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Short-container-title:Remote Sensing
Author:
Wei Xiaokai1, Li Jie23, Han Ding1, Wang Junlin1ORCID, Zhan Ying1, Wang Xin1ORCID, Feng Kaiqiang2
Affiliation:
1. School of Electronic Information Engineering, Inner Mongolia University, Hohhot 010021, China 2. National Key Laboratory for Electronic Measurement Technology, North University of China, Taiyuan 030051, China 3. Key Laboratory of Instrumentation Science & Dynamic Measurement, North University of China, Taiyuan 030051, China
Abstract
Alignment technology plays an important role in navigation, and is used extensively throughout military and civilian applications. However, the existing in-flight alignment methods cannot be applied to the low-cost based strap-down inertial navigation system/global positioning system integrated navigation system, used in short-endurance and high-speed rotation flight bodies, since they cannot quickly obtain alignment results to meet the accuracy requirements of a flight body with special movement characteristics of short-endurance and high-speed rotation. In this paper, in order to solve this challenging problem of alignment for flight body with short-endurance and high-speed rotation, a fast in-flight alignment method based on the Lie group is proposed. First, an in-flight alignment model based on vector observations was established by using the Lie group. Second, addressing the problem that the alignment accuracy is greatly affected by the low-cost inertial sensor bias, an improved unscented Kalman filter was constructed in the Lie group on the basis of fully considering the characteristics of the system equations to estimate and feedback the correlated errors. Finally, a trajectory simulation of high-speed flight body and field semi-physical test was carried out to evaluate the proposed method. Evaluation of the system performance in comparison with existing state-of-the-art methods indicated that the proposed in-flight alignment method has better alignment accuracy and faster alignment velocity for a low-cost strap-down inertial navigation system/global positioning system integrated navigation system.
Funder
National Natural Science Foundation of China high level talent research startup project of Inner Mongolia University
Subject
General Earth and Planetary Sciences
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