机载组合导航系统实际导航性能计算方法  

Actual Navigation Performance Calculation of Onboard Integrated Navigation System

作　　者：孙淑光[1] 戴博[1] 张鹏[2] 

机构地区：[1]中国民航大学智能信号与图像处理天津市重点实验室,天津300300 [2]中国民航大学工程技术训练中心,天津300300

出　　处：《控制工程》2011年第2期262-266,共5页Control Engineering of China

基　　金：国家863高技术研究计划(2006AA12Z313);国家自然基金资助项目(60472124)

摘　　要：机载组合导航系统的实际导航性能计算是民航实施基于性能的导航(PBN)的关键技术,PBN要求机载组合导航系统能够利用相关数据实现其自身实际导航性能的实时评估计算,从而达到高可靠性要求下的缩小航路间隔,提高空域利用的目的。提出了机载组合导航系统实际导航性能实时计算评估的方法。通过分割卡尔曼滤波器的协方差矩阵获取位置误差矩阵,求解实际导航性能的标准差椭圆,利用二维高斯分布概率特性,将误差椭圆转换为概率为95%的误差圆,从而得到机载组合导航系统实际导航性能。利用Matlab以及GPS/IRS和DME/DME/IRS组合导航数据对该方法进行了仿真验证,结果证明,该方法切实可行,能准确评估计算导航系统性能,且计算简单。The key technology of real-time assessment of actual navigation performance（ANP） required in performance based navigation （PBN） is dealt with PBN implementation, can help to reduce separation between the routes and thus increase airspace usages with high reliability. ANP calculation of onboard hybridized navigation systems is presented. The standard error of position is extracted by partitioning the covariance matrix of Kalman filter. The error ellipse is changed into 95 % confidence error circle using the standard error uncertainty ellipse and the character of two dimensional Gaussian distribution, then the ANP of onboard hybridized navigation system is obtained. The simulation results on GPS/IRS and DME/DME/IRS navigation performance assessment using Matlab, show this method is feasible, and can assess the navigation performance accurately and the calculation is simple.

关 键 词：实际导航性能 位置不确定度 高斯分布 卡尔曼滤波 

分 类 号：TP273[自动化与计算机技术—检测技术与自动化装置]