A Rapid Initial Alignment Alogrithm Based on Strapdown Gyrocompass

Si Hai Li; Gong Min Yan; Peng Xiang Yang; Yong Yuan Qin

doi:10.4028/www.scientific.net/AMR.532-533.1563

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HomeAdvanced Materials ResearchAdvanced Materials Research Vols. 532-533A Rapid Initial Alignment Alogrithm Based on...

A Rapid Initial Alignment Alogrithm Based on Strapdown Gyrocompass

Abstract:

The basic principles for stabilized gyrocompass initial alignment are analyzed in platform inertial navigation system (PINS), then similar principles and initial alignment algorithms suitable for programming are proposed for strapdown inertial navigation system (SINS). The scheme of SINS gyrocompass initial alignment can be divided into four steps, including leveling alignment with header uncertainty, coarse header alignment, leveling realignment and gyrocompass alignment for header. By simplifying SINS nonlinear error model under header uncertainty, the formula of coarse header alignment is deduced. On the assumption of navigation computer having large memory and powerful computing ability, and basing on the ‘multiformity’ of SINS mathematical platform and the ability to attitude reverse control, a specific progress for SINS rapid gyrocompass alignment is introduced and designed in detail. Finally, some tests prove that the proposed alignment algorithm in this paper is effective.

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Periodical:

Advanced Materials Research (Volumes 532-533)

Pages:

1563-1567

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.532-533.1563

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Online since:

June 2012

Authors:

Si Hai Li, Gong Min Yan, Peng Xiang Yang, Yong Yuan Qin

Keywords:

Fast Initial Alignment, Gyrocompass, Strapdown Inertial Navigation System (SINS)

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