Alignment Method for FOG Single-Axis Rotation-Modulation SINS

Fang Liu; Wei Wang; Kui Li; Lei Wang

doi:10.4028/www.scientific.net/AMM.229-231.1127

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HomeApplied Mechanics and MaterialsApplied Mechanics and Materials Vols. 229-231Alignment Method for FOG Single-Axis...

Alignment Method for FOG Single-Axis Rotation-Modulation SINS

Abstract:

Aircrafts with common attitude maneuverability (e.g. helicopter) are in more and more urgent need of low cost and high precision inertial navigation system (INS). To meet this demand, a scheme of fiber-optic gyroscope (FOG) strapdown inertial navigation system (SINS) with single-axis to and fro rotation-modulation method is adopted. A short-time alignment method bases on open-loop mathematic platform misalignment model is studied. The test results from the actual system show that this method has characteristic of high accuracy and simple, reliable operation. The estimate accuracy of azimuth error and is less than 2’. And the estimate error of north drift achieves 0.001º/h. Simultaneously, the input-axis accelerometer bias and gyroscope drift are estimated exactly.

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Periodical:

Applied Mechanics and Materials (Volumes 229-231)

Pages:

1127-1131

DOI:

https://doi.org/10.4028/www.scientific.net/AMM.229-231.1127

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Online since:

November 2012

Authors:

Fang Liu, Wei Wang, Kui Li, Lei Wang

Keywords:

Alignment, Fiber-Optic Gyroscope (FOG), Rotation-Modulation, Strapdown Inertial Navigation System (SINS)

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