Identifying Z-axis gyro drift and scale factor error using azimuth measurement in fiber optic gyroscope single-axis rotation inertial navigation system

Lingcao Wang; Kui Li; Lei Wang; Jiaxin Gao

doi:10.1117/1.OE.56.2.024102

3 February 2017 Identifying Ζ-axis gyro drift and scale factor error using azimuth measurement in fiber optic gyroscope single-axis rotation inertial navigation system

Lingcao Wang, Kui Li, Lei Wang, Jiaxin Gao

Author Affiliations +

Optical Engineering, Vol. 56, Issue 2, 024102 (February 2017). https://doi.org/10.1117/1.OE.56.2.024102

Abstract

In the fiber optic gyroscope (FOG) single-axis rotation inertial navigation system (SRINS), the <inline-formula< <mml:math display="inline" xmlns:mml="http://www.w3.org/1998/Math/MathML"< <mml:mrow< <mml:mi<Z</mml:mi< </mml:mrow< </mml:math< </inline-formula<-axis gyro drift (<inline-formula< <mml:math display="inline" xmlns:mml="http://www.w3.org/1998/Math/MathML"< <mml:mrow< <mml:msub< <mml:mi<ϵ</mml:mi< <mml:mi<z</mml:mi< </mml:msub< </mml:mrow< </mml:math< </inline-formula<) dramatically limits its navigation precision and the <inline-formula< <mml:math display="inline" xmlns:mml="http://www.w3.org/1998/Math/MathML"< <mml:mrow< <mml:mi<Z</mml:mi< </mml:mrow< </mml:math< </inline-formula<-axis gyro scale factor error (<inline-formula< <mml:math display="inline" xmlns:mml="http://www.w3.org/1998/Math/MathML"< <mml:mrow< <mml:mi<δ</mml:mi< <mml:msub< <mml:mi<K</mml:mi< <mml:mrow< <mml:mi<G</mml:mi< <mml:mi<z</mml:mi< </mml:mrow< </mml:msub< </mml:mrow< </mml:math< </inline-formula<) can cause greater navigation error because of the rotation process compared with the strap-down inertial navigation system. Hence, identification and compensation for the <inline-formula< <mml:math display="inline" xmlns:mml="http://www.w3.org/1998/Math/MathML"< <mml:mrow< <mml:msub< <mml:mi<ϵ</mml:mi< <mml:mi<z</mml:mi< </mml:msub< </mml:mrow< </mml:math< </inline-formula< and <inline-formula< <mml:math display="inline" xmlns:mml="http://www.w3.org/1998/Math/MathML"< <mml:mrow< <mml:mi<δ</mml:mi< <mml:msub< <mml:mi<K</mml:mi< <mml:mrow< <mml:mi<G</mml:mi< <mml:mi<z</mml:mi< </mml:mrow< </mml:msub< </mml:mrow< </mml:math< </inline-formula< 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 <inline-formula< <mml:math display="inline" xmlns:mml="http://www.w3.org/1998/Math/MathML"< <mml:mrow< <mml:msub< <mml:mi<ϵ</mml:mi< <mml:mi<z</mml:mi< </mml:msub< </mml:mrow< </mml:math< </inline-formula< and <inline-formula< <mml:math display="inline" xmlns:mml="http://www.w3.org/1998/Math/MathML"< <mml:mrow< <mml:mi<δ</mml:mi< <mml:msub< <mml:mi<K</mml:mi< <mml:mrow< <mml:mi<G</mml:mi< <mml:mi<z</mml:mi< </mml:mrow< </mml:msub< </mml:mrow< </mml:math< </inline-formula<. Compared with the traditional method, which takes velocity and position errors as measurements, the time required for identifying <inline-formula< <mml:math display="inline" xmlns:mml="http://www.w3.org/1998/Math/MathML"< <mml:mrow< <mml:msub< <mml:mi<ϵ</mml:mi< <mml:mi<z</mml:mi< </mml:msub< </mml:mrow< </mml:math< </inline-formula< 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 <inline-formula< <mml:math display="inline" xmlns:mml="http://www.w3.org/1998/Math/MathML"< <mml:mrow< <mml:msub< <mml:mi<ϵ</mml:mi< <mml:mi<z</mml:mi< </mml:msub< </mml:mrow< </mml:math< </inline-formula< reaches 0.002°/h and that of the <inline-formula< <mml:math display="inline" xmlns:mml="http://www.w3.org/1998/Math/MathML"< <mml:mrow< <mml:mi<δ</mml:mi< <mml:msub< <mml:mi<K</mml:mi< <mml:mrow< <mml:mi<G</mml:mi< <mml:mi<z</mml:mi< </mml:mrow< </mml:msub< </mml:mrow<

Citation Download Citation

Lingcao Wang, Kui Li, Lei Wang, and Jiaxin Gao "Identifying Ζ-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

Received: 11 October 2016; Accepted: 12 January 2017; Published: 3 February 2017

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available