Proceedings of the Korean Institute of Navigation and Port Research Conference (한국항해항만학회:학술대회논문집)
- Volume 1
- /
- Pages.9-14
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- 2006
A Theoretical Study on Free Gyrocompass
- Park, Sok-Chu (Division of Marine Systems Engineering, Korea Maritime University) ;
- Jeong, Tae-Gweon (Division of Navigation System Engineering, Korea Maritime University)
- Published : 2006.12.07
Abstract
The authors aim to establish the theory necessary for developing the free gyrocompass. The following considerations are taken. One is to suggest north-finding principle by the angular velocity of the earth's rotation, and the other is to suggest that the motion rate of the spin axis in the free gyro frame is transformed into the platform fame and this transformed rate is again transformed into the NED navigation frame. After transformation ship's heading is obtained using the fore-aft and athwartship components of the motion rate of the spin axis in the NED frame In addition it was suggested how to solve the transformation matrix necessary for transforming each frame.
Keywords
- free gyro;
- angular velocity of the earth's rotation;
- motion rate of spin axis;
- gyro frame;
- platform frame;
- NED navigaion frame