INS’s error compensation on the base of the celestial theodolite

Hai-bo Zhao; Li-hong Guo

doi:10.1117/12.666960

9 December 2005 INS's error compensation on the base of the celestial theodolite

Hai-bo Zhao, Li-hong Guo

Proceedings Volume 6024, ICO20: Optical Devices and Instruments; 60242E (2005) https://doi.org/10.1117/12.666960
Event: ICO20:Optical Devices and Instruments, 2005, Changchun, China

Abstract

In recent years there has been a major upsurge of interest in the integrated inertial navigation system (INS)/celestial navigation system (CNS) as a cost-effective way of providing accurate and reliable navigation aid for civil and military vehicles (ships, aircrafts, land vehicles and so on). One of the disadvantages of INS is its errors will grow unbounded. The CNS can be used to improve position estimation resulting from INS measurement. This paper describes the design of this. An error model developed earlier is used for CNS/INS filter (Kalman filter) mechanization. In CNS, celestial theodolite acquires an image of the sky, recognize the most brilliant stars in the image, creates with them a "constellation", and searches for this pattern in an on board star catalogue of the observed region to get the precise position and attitude information of vehicles. The Kalman filter method is used to fuse measurement from the system. We can use this information to compensate INS's error. The tests carry out with this system show that system will get accurate navigation information.

Citation Download Citation

Hai-bo Zhao and Li-hong Guo "INS's error compensation on the base of the celestial theodolite", Proc. SPIE 6024, ICO20: Optical Devices and Instruments, 60242E (9 December 2005); https://doi.org/10.1117/12.666960

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