In required navigation performance（RNP）, total system error（TSE） is estimated to provide a timely warning in the presence of an excessive error. In this paper, by analyzing the underlying formation mechanism, the ...In required navigation performance（RNP）, total system error（TSE） is estimated to provide a timely warning in the presence of an excessive error. In this paper, by analyzing the underlying formation mechanism, the TSE estimation is modeled as the estimation fusion of a fixed bias and a Gaussian random variable. To address the challenge of high computational load induced by the accurate numerical method, two efficient methods are proposed for real-time application, which are called the circle tangent ellipse method（CTEM） and the line tangent ellipse method（LTEM）,respectively. Compared with the accurate numerical method and the traditional scalar quantity summation method（SQSM）, the computational load and accuracy of these four methods are extensively analyzed. The theoretical and experimental results both show that the computing time of the LTEM is approximately equal to that of the SQSM, while it is only about 1/30 and 1/6 of that of the numerical method and the CTEM. Moreover, the estimation result of the LTEM is parallel with that of the numerical method, but is more accurate than those of the SQSM and the CTEM. It is illustrated that the LTEM is quite appropriate for real-time TSE estimation in RNP application.展开更多
为评估新设计民用飞机所需导航性能(required navigation performance,RNP)的导航能力,针对直飞(track to fix,TF)航段和固定转弯半径(radius to fix,RF)航段类型,建立了飞行侧向偏差模型和飞行高度偏差模型,通过地理坐标转换,计算飞机...为评估新设计民用飞机所需导航性能(required navigation performance,RNP)的导航能力,针对直飞(track to fix,TF)航段和固定转弯半径(radius to fix,RF)航段类型,建立了飞行侧向偏差模型和飞行高度偏差模型,通过地理坐标转换,计算飞机实际飞行航迹与定义航径之间的偏差。以某新民用飞机的一次飞行为例,选取某机场进近的飞行数据进行计算,对飞行偏差进行统计,分析该飞机的适航情况及所对应的导航能力。结果表明,该飞机的基于性能导航(performance based navigation,PBN)的导航精度可满足适航标准中RNP 0.1的要求,机型执行RNP程序的质量达标。展开更多
对PBN概念下各类进近程序进行了探讨,研究了RNP APCH和RNP AR APCH两类进近程序的不同特点,提出了在不同地区选择使用不同适合种类进近程序的方法,使PBN程序在提高飞行安全水平,增加机场容量和运行效能方面发挥最大效能,促进PBN程序在...对PBN概念下各类进近程序进行了探讨,研究了RNP APCH和RNP AR APCH两类进近程序的不同特点,提出了在不同地区选择使用不同适合种类进近程序的方法,使PBN程序在提高飞行安全水平,增加机场容量和运行效能方面发挥最大效能,促进PBN程序在我国的应用,满足我国民航交通运输快速发展的需要.展开更多
基金supported by the National Basic Research Program of China (No. 2010CB731805)the Foundation for Innovative Research Groups of the National Natural Science Foundation of China (No. 60921001)the Special Fund for Basic Research on Scientific Instruments of China (No. 2011YQ04008301)
文摘In required navigation performance（RNP）, total system error（TSE） is estimated to provide a timely warning in the presence of an excessive error. In this paper, by analyzing the underlying formation mechanism, the TSE estimation is modeled as the estimation fusion of a fixed bias and a Gaussian random variable. To address the challenge of high computational load induced by the accurate numerical method, two efficient methods are proposed for real-time application, which are called the circle tangent ellipse method（CTEM） and the line tangent ellipse method（LTEM）,respectively. Compared with the accurate numerical method and the traditional scalar quantity summation method（SQSM）, the computational load and accuracy of these four methods are extensively analyzed. The theoretical and experimental results both show that the computing time of the LTEM is approximately equal to that of the SQSM, while it is only about 1/30 and 1/6 of that of the numerical method and the CTEM. Moreover, the estimation result of the LTEM is parallel with that of the numerical method, but is more accurate than those of the SQSM and the CTEM. It is illustrated that the LTEM is quite appropriate for real-time TSE estimation in RNP application.
文摘为评估新设计民用飞机所需导航性能(required navigation performance,RNP)的导航能力,针对直飞(track to fix,TF)航段和固定转弯半径(radius to fix,RF)航段类型,建立了飞行侧向偏差模型和飞行高度偏差模型,通过地理坐标转换,计算飞机实际飞行航迹与定义航径之间的偏差。以某新民用飞机的一次飞行为例,选取某机场进近的飞行数据进行计算,对飞行偏差进行统计,分析该飞机的适航情况及所对应的导航能力。结果表明,该飞机的基于性能导航(performance based navigation,PBN)的导航精度可满足适航标准中RNP 0.1的要求,机型执行RNP程序的质量达标。
