【摘 要】
：
Celestial navigation subsystem of airborne celestial/inertial integrated navigation system periodically correct the positioning error and heading drift of t
【机 构】
：
Xi'anInstituteofOpticsandPrecisionMechanics,China
【出 处】
：
2014年光子与光学工程国际会议暨西部光子学学术会议
论文部分内容阅读
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 is caused by the error of the star tracking platform with the MATLAB software.Finally,a set of known stars and device location information obtained from the optical measurement device in range are used to verify the positioning error model.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 is in less than 1000m,which shows that the model is correct.
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