5 May 2017 A calibration method of non-orthogonal redundant ring laser gyro inertial navigation system
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As a highly reliable positioning and orientation equipment, the redundant inertial navigation system (INS) is widely used in aerospace and other fields. For INS, high-precision calibration is the basis of high-precision navigation. Different from the calibration error modeling method of traditional orthogonal system, the nonorthogonal redundant ring laser gyro INS is installed with multi-device obliquely, and with the complexity of the configuration, the difficulty of separating the calibration parameters is also increased. Therefore, it is very significant to find a high precision calibration scheme for the non-orthogonal redundant INS. In this paper, the high precision calibration of non-orthogonal redundant INS in laboratory is studied, and a new calibration model of redundant system is summarized. A regular tetrahedral configuration prototype consisting of four Ring Laser Gyro and four Quartz Accelerometer is designed, and the calibration error modeling method and calibration accuracy are verified.
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Chunfeng Gao, Chunfeng Gao, Qi Wang, Qi Wang, Guo Wei, Guo Wei, Zhihui Ying, Zhihui Ying, Xingwu Long, Xingwu Long, "A calibration method of non-orthogonal redundant ring laser gyro inertial navigation system", Proc. SPIE 10184, Sensors, and Command, Control, Communications, and Intelligence (C3I) Technologies for Homeland Security, Defense, and Law Enforcement Applications XVI, 1018413 (5 May 2017); doi: 10.1117/12.2266138; https://doi.org/10.1117/12.2266138

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