Z -axis gyro drift and scale factor error using azimuth measurement in fiber optic gyroscope single-axis rotation inertial navigation system" />
3 February 2017 Identifying Z -axis gyro drift and scale factor error using azimuth measurement in fiber optic gyroscope single-axis rotation inertial navigation system
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Abstract
In the fiber optic gyroscope (FOG) single-axis rotation inertial navigation system (SRINS), the Z -axis gyro drift ( ϵ z ) dramatically limits its navigation precision and the Z -axis gyro scale factor error ( δ K G z ) can cause greater navigation error because of the rotation process compared with the strap-down inertial navigation system. Hence, identification and compensation for the ϵ z and δ K G z are important in SRINS. An approach based on the azimuth error model of open-loop algorithm is proposed. This approach considers azimuth angle as a measurement and uses a least recursive square algorithm for identifying the ϵ z and δ K G z . Compared with the traditional method, which takes velocity and position errors as measurements, the time required for identifying ϵ z with the proposed method is only approximately 10 min, while the traditional method requires 6 h to 12 h. Experimental results from an SRINS with FOGs demonstrate that the accuracy of identifying the ϵ z reaches 0.002°/h and that of the δ K G z
© 2017 Society of Photo-Optical Instrumentation Engineers (SPIE)
Lingcao Wang, Kui Li, Lei Wang, Jiaxin Gao, "Identifying Z -axis gyro drift and scale factor error using azimuth measurement in fiber optic gyroscope single-axis rotation inertial navigation system," Optical Engineering 56(2), 024102 (3 February 2017). https://doi.org/10.1117/1.OE.56.2.024102 . Submission: Received: 11 October 2016; Accepted: 12 January 2017
Received: 11 October 2016; Accepted: 12 January 2017; Published: 3 February 2017
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