天体测量方法解算惯导漂移的原理及其模拟∗

摘要

The precision of Inertial Navigation System (INS) on the air vehicle is strongly affected by the accumulation errors of the rotation drift around its three axes. A new method is proposed in detail for estimating the drift via astrometric techniques. A simulation software is developed according to the algorithm used for this method. It can produce the observational data, estimate unknowns of the drifts of three axes, and also evaluate the result of the proposed method. The feasibility of proposed method is shown with the experiments done with the simulation software.%惯性导航系统绕其坐标轴的角度漂移极大地制约着飞行器基于惯导(惯性导航)进行导航的效果。提出了基于天体测量原理纠正惯性导航角度漂移的方法，详述了其实现过程。利用设计的方案及编制的软件进行了模拟实验，模拟数据结果表明：提出的方法能有效地求解并纠正惯性导航系统的角度漂移。