高原机场着陆性能计算与分析

针对高原机场着陆过程,将其分为空中直线下滑、拉平、地面滑跑3个阶段进行建模研究,选取着陆滑跑距离为研究对象,提出利用飞参数据反推确定刹车摩擦系数的方法并应用于着陆计算模型中,将计算结果与手册数据对比,说明改进后计算模型的准确性与可行性。结果表明:相同计算条件下,采用传统方法计算的滑跑距离与飞行实测数据数据的最大绝对误差为65 m,最大相对误差为6.7%;采用改进后的方法最大绝对误差缩小到20 m,最大相对误差缩小到2%。研究着陆滑跑距离与海拔高度、飞行质量、温度、着陆迎角、风速和最大刹车压力之间的关系并给出相关曲线,对曲线的变化进行分析。研究结果表明,该模型准确性高,适用范围较为广泛,具有一定的实用价值。

Calculation and analysis of landing performance of Plateau Airport

Aiming at the landing process in plateau airport, it is divided into three stages: straight line glide in the air, leveling and ground slide. The landing slide distance is selected as the research object. A method for determining the brake friction coefficient by using flight parameter data back-stepping is proposed and applied to the calculation model. The calculation results are compared with the manual data, which shows the accuracy and feasibility of the improved calculation model. The results show that under the same calculation conditions, the maximum absolute error between the traditional method and the flight data is 65 m and the maximum relative error is 6.7%. The maximum absolute error of the improved method is reduced to 20 m and the maximum relative error is reduced to 2%. The relationship between landing slide distance and altitude, flight quality, temperature, landing AOA, wind speed and maximum braking pressure is studied, and the relevant curves are given, and the changes of the curves are analyzed. The results show that the model has high accuracy and wide application range and has practical value.