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

被引：4
|
作者：
Ben, Yueyang [1 ]
Zhang, Qiang [1 ]
Zang, Xinle [1 ]
Huang, Lei [1 ]
Li, Qian [2 ]
Wang, Guochen [1 ]
机构：
[1] Harbin Engn Univ, Coll Automat, Harbin, Heilongjiang Pr, Peoples R China
[2] Harbin Inst Technol, Dept Elect Engn & Automat, Harbin, Heilongjiang Pr, Peoples R China
来源：
OPTICAL ENGINEERING | 2017年 / 56卷 / 04期
基金：
中国国家自然科学基金;
关键词：
fiber-optic gyro; strapdown; inertial navigation system; gyrocompass; alignment; SINS;
D O I：
10.1117/1.OE.56.4.044106
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
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. (C) 2017 Society of Photo-Optical Instrumentation Engineers (SPIE)
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页数：13
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