大型运输机在风切变环境中的告警规避分析

Warning and avoidance analysis of large transport aircraft in windshear

大型飞机遭遇微下冲流时,最安全的方法就是规避。在规避过程中,考虑了飞行员的乘坐舒适性(侧向过载限制)和飞机最低安全高度限制两个约束条件。首先,建立了受约条件下的规避数学模型;然后,结合模型分析了飞机在不同高度、速度及告警距离等条件下,横航向规避飞行参数和相应的规避轨迹;最后,通过分析和仿真得到了飞机遭遇微下冲流时的安全规避半径、规避角速度和规避时间,同时给出了不同告警距离下飞机规避时的最小安全高度曲线。

The most safety method is to avoid it when the large aircraft encounters the microburst.Two constraint conditions including the pilot＇s comfortability（side load limitation） and the minmum safe altitude are considered in process of avoidance.Firstly,the avoidance mathematical models subject to sideload and minmum safe altitude is established.Combined with models,the lateral and directional flight parameters and avoidance path are analyzed at different height,speed and warning distance.The safe avoidance radius,angular velocity and time are obtained by analysis and simulation when the aircraft flyies through microburst;and the curve of minimum safety height at different warning distance is provided.