惯性系统飞行试验精度检验方法

A Method for Testing Accuracy of Inertial System in Flight Test

目的针对传统工具误差分离方法得到的分离结果不够准确可信的问题,提出了一种利用等效误差实现对惯性系统精度判定的方法。方法首先基于主成分分析,定义等效误差,等效误差具有独立、无偏的性质。然后提出基于等效误差的假设检验判断惯性系统精度是否合格的方法。结果算例表明采用该方法可以实现惯性系统精度的可信判断。结论该方法解决了以往方法误差大,分析结论可信度不高的问题。

Objective Aiming at the problem that results obtained by the traditional instrument error separation method are not accurate enough, a method for determining the accuracy of the inertial system by using equivalent error is pro-posed. Methods Firstly, the equivalent error which was independent and unbiased was defined based on the principal component analysis. Then, a method based on the hypothesis test of the equivalent error was put forward to determine the precision of the inertial system. Results The example showed that the method can be used to determine the inertial system accuracy credibly. Conclusion With this method, the problem that the error is large and the credibility is low in the pre-vious approach is solved.