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针对捷联惯组稳定性评估研究中,缺少客观的评估模型,不能深入的刻画出捷联惯组在使用过程中稳定性变化规律和不能很好确定稳定性较差的误差系数。提出利用时序主成分分析法,建立一个综合评价模型,结合惯组的履历信息和历次测试数据,对惯组稳定性进行评估。实例分析表明,综合模型能够较好描述惯组稳定性变化,特别是反映惯组稳定性有异常变化的情况;并从主成分综合影响度的角度,确定惯组稳定性较差的误差系数。
In the research of the stability evaluation of SINS, the lack of objective evaluation model can not depict the stability change rule of SINS during the course of use and can not well determine the error coefficient of poor stability. This paper proposes to use time series principal component analysis to establish a comprehensive evaluation model and to evaluate the stability of the habitual group based on the historical information of the habitual group and the previous test data. The case study shows that the comprehensive model can better describe the change of the stability of the inertial mass, especially the abnormal change of the stability of the inertial mass. The error coefficient of the inferior stability of the inertial mass is determined from the perspective of the comprehensive influence of the principal component.