CAJ | 학술논문

针对大部分飞行器导航采用地理坐标系导航，天文导航在地理坐标系下姿态解算依赖导航位置而容易发生精度发散的问题，文章研究了地理坐标系下，天文/惯性姿态组合导航系统滤波算法，以有效提高导航系统的精度。首先，对天文/惯性组合导航系统数学模型进行分析；然后，用Matlab软件根据实际情况设定参数并获得仿真数据，在仿真数据的基础上进行标准的卡尔曼滤波的仿真研究。仿真结果表明，当惯导与天文导航进行姿态组合后，各导航参数精度明显提高，在短期内可认为是收敛的，但仿真时间较长后，各导航参数出现缓慢的发散趋势。
침대대부분비행기도항채용지리좌표계도항，천문도항재지리좌표계하자태해산의뢰도항위치이용역발생정도발산적문제，문장연구료지리좌표계하，천문/관성자태조합도항계통려파산법，이유효제고도항계통적정도。수선，대천문/관성조합도항계통수학모형진행분석；연후，용Matlab연건근거실제정황설정삼수병획득방진수거，재방진수거적기출상진행표준적잡이만려파적방진연구。방진결과표명，당관도여천문도항진행자태조합후，각도항삼수정도명현제고，재단기내가인위시수렴적，단방진시간교장후，각도항삼수출현완만적발산추세。
Lots of aircrafts using the geographic coordinate to navigate and celestial navigation calculate posture relies on the location of carrier, and the accuracy of the parameters is easy to divergence. According to this problem, in this paper the filtering algorithm of CNS/SINS posture integrated navigation system in the geographic coordinate was studied to en-hance the precision of the navigation system. Firstly, the mathematic models of the CNS/SINS integrated navigation system was analyzed, and it was simulated was done using Matlab. Then the parameters were set according to the practical of the flight vehicle and the simulating data was obtaied, and the simulating research was using Kalman filter based on the simu-lating data. The results showed that when using the CNS/SINS posture integrated navigation, the precision of parameters was improved clearly and convergent in the short term. But the parameters trended divergent when simulation time was long.