惯性系下平台惯导传递对准方法

Transfer alignment of platform inertial navigation in the inertial coordinate

由于导弹的高速旋转导致其内部的子惯导平台难以施矩,不能跟踪地理系,在发射前需要使子惯导平台跟踪惯性系,而主惯导则一直跟踪地理系。针对这一情况的传递对准应用问题给出了相应的解决办法。首先介绍了跟踪惯性系平台惯导的工作原理,然后针对这种情况,提出了2种惯性系下传递对准的方法,分别是平台惯性系以及地心惯性系下的速度匹配。经过对比分析,仿真结果说明平台惯性系下的方位失准角精度不高,而地心惯性系下在3个方向上都达到了误差小于1′的精度,是一种可行的对准方法。

Due to high speed rotation of the missile, the internal slave platform inertial navigation system cannot be torqued to track the geographical coordinate, so it is necessary to make the slave navigation platform track tile inertial coordinate before the missile launch, while the master platform inertial navigation system still tracks the geographical coordinate. To solve the transfer alignment problem of the situation, this paper puts for- ward the corresponding solutions, the principle of the platform inertial navigation system which tracks the iner- tial coordinate is introduced firstly, then the transfer alignment methods in two kinds of inertial coordinate （the platform inertial coordinate and the geocentric inertial coordinate） are proposed. The simulation results show that the precision of the azimuth misalignment angle in the platform inertial coordinate is not preferable,howev- er, the misalignment angle in the geocentric inertial coordinate achieves an accuracy of less than 1＇, which shows that it is a feasible method of alignment.