The study of north-finder based on rate biased RLG

Author

Yan, Zhang ; Wenqi, Wu ; Juliang, Cao

Author_Institution

Coll. of Mechatron. & Autom., Nat. Univ. of Defense Technol., Changsha, China

fYear

2010

fDate

8-10 June 2010

Firstpage

780

Lastpage

783

Abstract

Rated biased RLG is used in the north-finder based on a continuous rotation platform. Along with the rotating platform, the input axis of RLG relative to the earth rotation rate vector periodically changes. In this way, the measurement error of RLG is modulated in every direction. The cross-correlation analysis method is used for getting the azimuth angle. Considering the periodicity of gyro outputs, a digital filter is designed to decrease the influence of quantization error of RLG and some other wideband error sources. Experiment results show that the “cross-correlation analysis + filter” method can markedly increase the precision of the north-finder.

Keywords

digital filters; gyroscopes; measurement errors; quantisation (signal); ring lasers; azimuth angle; cross-correlation analysis method; digital filter; measurement error; north-finder; quantization error; rate biased RLG; Azimuth; Earth; Finite impulse response filter; Noise measurement; Quantization; Signal to noise ratio;

fLanguage

English

Publisher

ieee

Conference_Titel

Systems and Control in Aeronautics and Astronautics (ISSCAA), 2010 3rd International Symposium on

Conference_Location

Harbin

Print_ISBN

978-1-4244-6043-4

Electronic_ISBN

978-1-4244-7505-6

Type

conf

DOI

10.1109/ISSCAA.2010.5633349

Filename

5633349