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为解决现行净空评定模型在机场应急启用时不适用的问题,对机场端净空障碍物限制面进行重新确定。通过对飞机初始爬升和准备着陆过程的分析,建立了飞机爬升和下滑性能计算模型。应用Visual C++语言编写了计算程序进行仿真计算,得到了爬升梯度与气压高度的关系式。经航迹测试:Ⅰ型飞机的实测航迹与程序计算航迹的结果绝对误差不超过48m,最大相对误差不超过2.7%;Ⅱ型飞机的实测航迹与程序计算航迹的最大绝对误差不超过100 m,最大相对误差不超过4.2%,验证了模型的有效性,其适用范围广,结果精确。最后通过典型机型爬升和下滑分析,确定了机场应急启用端净空限制面。
In order to solve the problem that the current headroom assessment model does not apply when the airport emergency response is activated, the limitation of the airport-side clearance obstacle should be re-determined. Through the analysis of the initial climb and preparation of the landing process, a model for calculating the climb and slip performance of the aircraft is established. Using Visual C + + language to write a calculation program to simulate the calculation, got the climbing gradient and pressure altitude relationship. The track test: the actual flight track of Program Ⅰ and the program track calculation result is less than 48m, and the maximum relative error is less than 2.7%. The maximum absolute error of flight track and program track of Type Ⅱ aircraft is not More than 100 m, the maximum relative error does not exceed 4.2%, validated the validity of the model, its wide range of applications, the results are accurate. Finally, through the typical model climb and decline analysis, the airport emergency opening clearance limit was determined.