初始误差和制导工具误差的线性估计方法  

Linear Estimation of Initial Errors and Guidance Instrumentation Errors

作　　者：李冬 龚磊 LI Dong;GONG Lei(The No.92124th Troop of PLA,Dalian 116023,China)

机构地区：[1]中国人民解放军92124部队,辽宁大连116023

出　　处：《兵器装备工程学报》2018年第7期106-110,共5页Journal of Ordnance Equipment Engineering

基　　金：国家自然基金资助项目(61703408)

摘　　要：对于动基座发射飞行器的精度评定,给出了一种基于线性模型的误差估计方法,分析了平台初始失准角和定向误差的转换关系,采用线性化近似方法建立了同时估计初始误差和制导工具误差的线性模型,分析了该模型关于初始定向误差和加速度计安装误差角的复共线性,表明在没有任何先验信息的条件下无法准确给出这些误差的估计;给出了利用先验信息的Bayes估计方法,用以解决线性模型的复共线性;仿真结果表明:该方法的估计精度相对主成分估计方法有较大提高。For the precision assessment of moving-base launched aircraft, an estimation method based on linear model is given in this paper. The transition between the initial misalignment angles of platform and the initial orientation errors is analyzed. By using linear approximation, a linear model is constructed for estimating the initial errors and the guidance instrumentation errors simuhaneously. In this model, the serious muhicollinearity between the initial orientation errors and the accelerometer installation errors is found. Thus, these errors cannot be determined without any prior information. The Bayes estimation method using prior information is given to overcome the muhicollinearity. Simulation results show that the estimation accuracy is greatly improved over the principal component estimation method.

关 键 词：初始误差 制导工具误差 复共线性 Bayes极大后验估计 

分 类 号：TJ765.1[兵器科学与技术—武器系统与运用工程]