论文部分内容阅读
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 actual navigation performance calculation of airborne integrated navigation system is the key technology of civil aviation based on performance-based navigation (PBN). PBN requires that the integrated navigation system of airborne can use the related data to realize the real-time evaluation and calculation of its own actual navigation performance so as to achieve high reliability Reduce the route interval under the requirement of sex and improve the purpose of airspace utilization. A method of real-time calculation and evaluation of actual navigation performance of airborne integrated navigation system is proposed. The position error matrix is obtained by splitting the covariance matrix of Kalman filter and the standard deviation ellipse of the actual navigation performance is solved. The error ellipse is transformed into the error circle with the probability of 95% by using the probability characteristic of two-dimensional Gaussian distribution, Navigation system actual navigation performance. The method is verified by Matlab and GPS / IRS and DME / DME / IRS combined navigation data. The results show that this method is feasible and accurate, and can calculate and evaluate the performance of navigation system accurately.