Sensor and Platform Technologies

Spinning projectile’s attitude measurement using background magnetic field compensation

[+] Author Affiliations
Jing Yu, Xiongzhu Bu, Xinzheng Wang

Nanjing University of Science and Technology, School of Mechanical Engineering, 200 Xiaolingwei, Nanjing 210094, China

Chao Xiang

Shanghai Electro-Mechanical Engineering Institute, 6 Dasheng Road, Shanghai 200000, China

J. Appl. Remote Sens. 10(1), 014001 (Feb 01, 2016). doi:10.1117/1.JRS.10.014001
History: Received September 16, 2015; Accepted January 5, 2016
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Abstract.  Microinertial sensors currently cannot provide long-term stability attitude information for a spinning projectile because of drift error. An attitude measuring method of a spinning projectile based on the background magnetic field (BMF) compensation is presented. The effect of the BMF is discussed, with particular attention to its implications for magnetometer-based attitude measuring. First, a compensation model of the BMF is established. Then, the error in measuring attitude caused by the BMF is analyzed using a theoretical model and numerical simulation. An attitude measuring algorithm for the spinning projectile based on the intersection ratio of magnetic sensors is proposed. Finally, semiphysical experiments are carried out to prove the effectiveness of this attitude measurement method. The experiment results indicate that the error of attitude angles is within ±1  deg and the attitude angle error of the combined magnetic sensors is not cumulated. Compared with the traditional geomagnetic attitude measurement method, the accuracy of our method is improved, which can be used for the trajectory correction of simple guided ammunition.

© 2016 Society of Photo-Optical Instrumentation Engineers

Citation

Jing Yu ; Xiongzhu Bu ; Chao Xiang and Xinzheng Wang
"Spinning projectile’s attitude measurement using background magnetic field compensation", J. Appl. Remote Sens. 10(1), 014001 (Feb 01, 2016). ; http://dx.doi.org/10.1117/1.JRS.10.014001


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