民机近地告警系统的阈值非关键参数特性

Non-Critical Characteristic Parameters in Threshold of Airliner's Ground Proximity Warning System

针对民机近地告警系统中报警曲线阈值的非关键参数特性问题,建立民用飞机飞行运动学模型。利用飞机的运动学特性将飞机作为质点,根据离散的马尔科夫链计算地形高度分布建立二维地形模型,在这2个模型的基础上,利用模拟试验统计法,分析飞行员操作延时、地形陡峭程度、飞机法向过载以及飞机航迹倾斜角在内的4个参数对报警曲线阈值的影响,并在Matlab环境下对基于模拟试验统计法的告警系统进行仿真。仿真结果分析表明:在不改变告警曲线阈值走向的情况下,这4个参数会对告警曲线的斜率和范围存在一定影响。

This paper concentrates on discussing the influences of the non-critical characteristic parameters on alarm curve threshold in the ground proximity warning system for airliner.The civil aircraft flight kinematics model is established based on its kinematic characteristics.Besides,according to the calculation of markov chain of discrete topographic height distribution,the two-dimensional terrain model is established.In addition,using simulation test statistics,this paper analyses the influence of pilot operation delay,terrain steep degree,plane normal overload and aircraft flight path angle,four parameters on alarm curve threshold based on the model.Finally,simulation of this warning system is performed in Matlab.The result shows the four parameters has effects on the slope and ranges of the alarm curve by not changing the alarm curve threshold.