相关性和显著性结合的制导工具误差系数分离方法  

A method for separating error coefficients of inertial guidance tools by combining correlation and saliency

作　　者：魏宗康[1] 高荣荣 赵友[1] WEI Zongkang;GAO Rongrong;ZHAO You(Beijing Institute of Aerospace Control Devices,Beijing 100854,China)

机构地区：[1]北京航天控制仪器研究所,北京100854

出　　处：《中国惯性技术学报》2022年第6期799-806,共8页Journal of Chinese Inertial Technology

基　　金：科技创新特区重点研究项目(18-163-15-LZ-001-002-10)。

摘　　要：针对惯性制导工具误差分离准确度较低的问题,提出了一种相关性和显著性结合的惯性制导工具误差系数分离方法。首先,完整、准确的惯性测量系统误差模型是实现弹道导弹制导工具误差准确分离的基础,依次建立了陀螺仪和加速度计的高阶误差模型,可分离的误差系数达到63项,以此模型为基础,建立遥外测速度误差矩阵方程。其次,对于环境函数矩阵的复共线问题,给出了结构矩阵相关时的遥外测速度误差重构模型和系数计算方法,在经过相关性检验后的模型基础上,结合显著性检验方法,突出因子和输出之间的显著性关系,简化了模型,分离出了更精确、显著的制导工具误差系数。最后,将使用相关性和显著性结合得到的误差系数代入遥外测速度误差模型中进行补偿,得到补偿后的速度残差基本在±0.2 m/s之内,补偿效果较好。Aiming at the problem of low error separation accuracy of inertial guidance tools, a method of error coefficient separation of inertial guidance tools is proposed combining correlation and significance.Firstly, the complete and accurate error model of inertial measurement system is the basis for accurate error separation of ballistic missile guidance tool. The high-order error model of gyroscope and accelerometer is established successively, and the error coefficient can reach 63 items. Based on the proposed model, the error matrix equation of remote velocity measurement is established. Secondly, for the complex collinear problem of the environment function matrix, the reconstruction model of remote velocity measurement error and the calculation method of coefficient when the structure matrix is correlated are given. On the basis of the model after correlation test, combined with the significance test method, the significance relationship between the salient factor and the output is highlighted, the model is simplified, and the more accurate and significant error coefficient of guidance tool is separated. Finally, the error coefficient obtained by combining correlation and significance is substituted into the velocity error model of remote measurement for compensation. The velocity residual after compensation is basically within 0.2 m/s of soil. The compensation effect is good.

关 键 词：显著性 相关性 惯性制导工具误差 制导工具误差分离 

分 类 号：V448.1[航空宇航科学与技术—飞行器设计]