基于地平仪的惯性-天文组合导航

Inertial and celestial integrated navigation with horizon sensor

针对惯性导航由于加速度计存在漂移不能长时间使用,以及传统滤波算法复杂不适合工程应用等问题,提出一种基于星敏感器与地平仪确定的地心指向偏差修正惯导输出的惯性天文组合导航算法,阐述了算法原理及实现过程,并分析了工程应用方式。最后通过仿真实验证明该方法可以抑制惯性导航累积误差,且算法简单、易于工程实现。

Aiming at the problem that the inertial navigation could not be used for a long time because of the accelerometer drift,and traditional filtering methods are complex and not suitable for engineering application,the paper proposed a method of the inertial and celestial integrated navigation based on the geocentric point error determined by star sensor and horizon sensor,which corrected the accumulative error of the inertial navigation system.The methods of the inertial and celestial integrated navigation and the algorithm process were discussed,and the engineering application mode was analyzed.Finally,the simulation results showed that the proposed algorithm could restrain the accumulative error of inertial navigation system with simple calculation and easy implementation.