Effect of the outer lever arm on in-motion gyrocompass alignment for fiber-optic gyro strapdown inertial navigation system

Yueyang Ben; Qiang Zhang; Xinle Zang; Lei Huang; Qian Li; Guochen Wang

doi:10.1117/1.OE.56.4.044106

25 April 2017 Effect of the outer lever arm on in-motion gyrocompass alignment for fiber-optic gyro strapdown inertial navigation system

Yueyang Ben, Qiang Zhang, Xinle Zang, Lei Huang, Qian Li, Guochen Wang

Author Affiliations +

Optical Engineering, Vol. 56, Issue 4, 044106 (April 2017). https://doi.org/10.1117/1.OE.56.4.044106

Abstract

Fiber-optic gyro strapdown inertial navigation system is typically physically separated from the log giving an aiding velocity. This results in a velocity difference under angular motions, otherwise known as the outer lever arm effect. The mathematical relationship between the velocity difference and the outer lever arm is derived, and the effect of the outer lever arm on angular velocity compensation and harmful acceleration compensation is analyzed using the structure of in-motion gyrocompass alignment. Based on this analysis, a method for outer lever arm correction is given to counteract the outer lever arm effect on the performance of the alignment. Simulation and trial tests are then used to verify the analysis results.

Citation Download Citation

Yueyang Ben, Qiang Zhang, Xinle Zang, Lei Huang, Qian Li, and Guochen Wang "Effect of the outer lever arm on in-motion gyrocompass alignment for fiber-optic gyro strapdown inertial navigation system," Optical Engineering 56(4), 044106 (25 April 2017). https://doi.org/10.1117/1.OE.56.4.044106

Received: 31 January 2017; Accepted: 29 March 2017; Published: 25 April 2017

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