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Sensors 2018, 18(9), 2921; https://doi.org/10.3390/s18092921

Analysis and Self-Calibration Method for Asynchrony between Sensors in Rotation INS

1
School of Instrumentation Science and Opto-electronics Engineering, Beihang University, Beijing 100191, China
2
National Key Laboratory of Science and Technology on Aircraft Control, Xi’an 710065, China
*
Author to whom correspondence should be addressed.
Received: 19 June 2018 / Revised: 7 August 2018 / Accepted: 21 August 2018 / Published: 3 September 2018
(This article belongs to the Section Physical Sensors)
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Abstract

The gyroscope, accelerometer and angular encoder are the most important components in a dual-axis rotation inertial navigation system (RINS). However, there are asynchronies among the sensors, which will thus lead to navigation errors. The impact of asynchrony between the gyroscope and angular encoder on the azimuth error and the impact of asynchrony between the gyroscope and accelerometer on the velocity error are analyzed in this paper. A self-calibration method based on navigation errors is proposed based on the analysis above. Experiments show that azimuth and velocity accuracy can be improved by compensating the asynchronies. View Full-Text
Keywords: accelerometer; angular encoder; asynchrony; fiber optic gyroscope (FOG); rotation inertial navigation system (RINS); self-calibration accelerometer; angular encoder; asynchrony; fiber optic gyroscope (FOG); rotation inertial navigation system (RINS); self-calibration
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).
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Sui, J.; Wang, L.; Huang, T.; Zhou, Q. Analysis and Self-Calibration Method for Asynchrony between Sensors in Rotation INS. Sensors 2018, 18, 2921.

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