基于未确知数的PBN导航下的空中立交桥模型优化

Optimization of aerial overpass model based on PBN navigation of unascertained number

通过建立新型空中立交桥对航路交叉点进行优化,达到航路扩容的目的,使得交叉点的容量尽可能地与航路容量接轨,以解决交叉点对航路容量的限制问题。基于航空器在飞行中有很多无法确定的参数这一特征,将未确知数理论引入交叉点容量计算,并建立了空中立交桥的未确知数模型,得到了航空器在新型立交桥附近的各种可能区间以及其可信度水平,弥补了传统确定性模型的不足。通过在交叉点附近实行RNAV1导航规范,提高交叉点附近的导航精度。计算结果表明,在3种不同系数下,优化后的空中立交桥比优化前的容量分别增加了75.61%,74.39%和75.95%。

By establishing a new type of aerial overpass to optimize the intersection of the route,realize the purpose of extending the route,so that the capacity of the intersection is as close as possible to the capacity of the route,and the limitation of the route capacity at the intersection is solved.Based on the fact that the aircraft has many undetermined parameters in flight,the unascertained number theory is introduced into the intersection capacity calculation,and the unascertained number model of the aerial overpass is established.Various possibilities of the aircraft near the new overpass are obtained.The interval and its level of credibility compensate for the shortcomings of the traditional deterministic model.By implementing the RNAV1 navigation specification near the intersection,the navigation accuracy near the intersection is improved.Calculation results show that the optimized aerial overpass increases by 75.61%,74.39%and 75.95%respectively with the use of the three different coefficients.