HomePage
 




 


 

ISSN 2083-6473
ISSN 2083-6481 (electronic version)
 

 

 

Editor-in-Chief

Associate Editor
Tomasz Neumann
 

Published by
TransNav, Faculty of Navigation
Gdynia Maritime University
3, John Paul II Avenue
81-345 Gdynia, POLAND
www http://www.transnav.eu
e-mail transnav@am.gdynia.pl
A Study on the Errors in the Free-Gyro Positioning and Directional System
1 Korea Maritime University, Busan, Korea
ABSTRACT: This paper is to develop the position error equations including the attitude errors, the errors of nadir and ship's heading, and the errors of ship's position in the free-gyro positioning and directional system. In doing so, the determination of ship's position by two free gyro vectors was discussed and the algorithmic design of the free-gyro positioning and directional system was introduced briefly. Next, the errors of transformation matrices of the gyro and body frames, i.e., attitude errors, were examined and the attitude equations were also derived. The perturbations of the errors of the nadir angle including ship's heading were investigated in each stage from the sensor of rate of motion of the spin axis to the nadir angle obtained. Finally, the perturbation error equations of ship's position used the nadir angles were derived in the form of a linear error model and the concept of FDOP was also suggested by using covariance of position error.
REFERENCES
Hofmann-Wellenhof B, Lichtenegger H and Collins J(2001), “GPS, Theory and Practice”, 5th edition, SpringerWienNewYork, p. 272.
Jekeli, C.(2001), Inertial Navigation Systems with Geodetic Applications, Walter de Gruyter, p.147-157.
Jeong, T.G.(2005), “A Study on the Errors in the Free-Gyro Positioning System (Ⅰ)”, International Journal of Navigation and Port Research, Vol. 29, No. 7, pp. 611-614.
Jeong, T.G. and Park, S.C.(2006), “A Theoretical Study on Free Gyroscopic Compass”, International Journal of Navigation and Port Research, Vol. 30, No. 9, pp. 729-734.
Kaplan, E. D. et al(2006), Understanding GPS Principles and Application, 2nd edition, ARTECH House, p.331.
Park, S.C. and Jeong, T.G.(2004), “A Basic Study on Position Fixing by Free Gyros”, Journal of Korean Navigation and Port Research, Vol.28, No.8, pp. 653-657.
Rogers, R.M(2007), Applied Mathematics in Integrated Navigation Systems, 3rd ed., AIAA, pp.106-111.
Titterton, D.H. and Weston, J.L.(2004), Strapdown Inertial Navigation Technology, 2nd ed., AIAA, p. 287.
Citation note:
Jeong T.G.: A Study on the Errors in the Free-Gyro Positioning and Directional System. TransNav, the International Journal on Marine Navigation and Safety of Sea Transportation, Vol. 8, No. 2, doi:10.12716/1001.08.02.01, pp. 175-181, 2014

Other publications of authors:


File downloaded 758 times








Important: TransNav.eu cookie usage
The TransNav.eu website uses certain cookies. A cookie is a text-only string of information that the TransNav.EU website transfers to the cookie file of the browser on your computer. Cookies allow the TransNav.eu website to perform properly and remember your browsing history. Cookies also help a website to arrange content to match your preferred interests more quickly. Cookies alone cannot be used to identify you.
Akceptuję pliki cookies z tej strony