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Precision of the attitude algorithm of the strap-down inertial navigation system
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Paper Abstract

Based on the principle of the strap-down inertial navigation system and the attitude algorithm, a novel evaluation method is proposed. It could be used to effectively diagnostic the precision of the attitude algorithm. The experimental data including Algorithm 1 (N=2, P=0, optimal two-sample), Algorithm 2 (N=2, P=1) and Algorithm 3 (N=2, P=2) is recorded. The precision of the three algorithms is evaluated by calculating the relative error. In addition, the influence of the sampling frequency on the precision is investigated. The test results show that the precision of Algorithm 2 and Algorithm 3 is approximate; as the sampling frequency is improved from 1Hz to 20Hz, the precision of the attitude algorithm can research 0.08°. When choosing the attitude algorithm of the strap-down inertial navigation system, increasing the number of the sample not always depresses the coning error, improving the sampling frequency and using the former attitude to renew the number of the sample of the period could improve the precision of the attitude algorithm, further.

Paper Details

Date Published: 18 January 2019
PDF: 7 pages
Proc. SPIE 10839, 9th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Optical Test, Measurement Technology, and Equipment, 1083907 (18 January 2019); doi: 10.1117/12.2504808
Show Author Affiliations
Wei Zhang, Xi'an Institute of Optics and Precision Mechanics (China)
Kui Shi, Xi'an Institute of Optics and Precision Mechanics (China)
Yun Ai, Xi'an Institute of Optics and Precision Mechanics (China)
Juan Guo, Xi'an Institute of Optics and Precision Mechanics (China)


Published in SPIE Proceedings Vol. 10839:
9th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Optical Test, Measurement Technology, and Equipment
Fan Wu; Yudong Zhang; Xiaoliang Ma; Xiong Li; Bin Fan, Editor(s)

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