Research on the error model of airborne celestial/inertial integrated navigation system

Xiaoqiang Zheng; Xiaoguo Deng; Xiaoxu Yang; Qiang Dong

doi:10.1117/12.2075874

19 February 2015 Research on the error model of airborne celestial/inertial integrated navigation system

Xiaoqiang Zheng, Xiaoguo Deng, Xiaoxu Yang, Qiang Dong

Proceedings Volume 9449, The International Conference on Photonics and Optical Engineering (icPOE 2014); 944928 (2015) https://doi.org/10.1117/12.2075874
Event: The International Conference on Photonics and Optical Engineering and the Annual West China Photonics Conference (icPOE 2014), 2014, Xi'an, China

Abstract

Celestial navigation subsystem of airborne celestial/inertial integrated navigation system periodically correct the positioning error and heading drift of the inertial navigation system, by which the inertial navigation system can greatly improve the accuracy of long-endurance navigation. Thus the navigation accuracy of airborne celestial navigation subsystem directly decides the accuracy of the integrated navigation system if it works for long time. By building the mathematical model of the airborne celestial navigation system based on the inertial navigation system, using the method of linear coordinate transformation, we establish the error transfer equation for the positioning algorithm of airborne celestial system. Based on these we built the positioning error model of the celestial navigation. And then, based on the positioning error model we analyze and simulate the positioning error which are caused by the error of the star tracking platform with the MATLAB software. Finally, the positioning error model is verified by the information of the star obtained from the optical measurement device in range and the device whose location are known. The analysis and simulation results show that the level accuracy and north accuracy of tracking platform are important factors that limit airborne celestial navigation systems to improve the positioning accuracy, and the positioning error have an approximate linear relationship with the level error and north error of tracking platform. The error of the verification results are in 1000m, which shows that the model is correct.

Citation Download Citation

Xiaoqiang Zheng, Xiaoguo Deng, Xiaoxu Yang, and Qiang Dong "Research on the error model of airborne celestial/inertial integrated navigation system", Proc. SPIE 9449, The International Conference on Photonics and Optical Engineering (icPOE 2014), 944928 (19 February 2015); https://doi.org/10.1117/12.2075874

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