飞行模拟机增强型近地告警系统仿真研究与设计

增强型近地告警系统(EGPWS)是现代商用飞机必备系统,飞行模拟机进行EGPWS科目训练,可以有效避免由于飞行机组操作失误导致的可控飞行撞地(CFIT)风险。重点对EGPWS系统增强功能——前视地形显示预警和地形净空层告警功能进行了研究,实现相应的仿真设计。前视地形仿真利用DEM高程数据作为地形数据库,根据设置的显示精度划分地形栅格,判断扫描点落在栅格内的最高地形,地形扫描结果以机载显示系统约定的地形数据传输协议进行数据组包和传输。为展现直观的仿真结果,使用VPS XT软件绘制地形显示和告警显示界面,以模拟机仿真传感器参数作为系统输入,验证了包括地形告警和显示在内的EGPWS系统功能的正确性。

EGPWS Simulation for Flight Simulator

Enhanced ground proximity warning system (EGPWS) is a necessary system for modern commercial aircraft.EGPWS subject training in flight simulators can effectively avoid controlled flight impact (CFIT) risks which are caused by flight crew operation error.The enhanced functions of EGPWS system,such as terrain awareness and display (TAD) and terrain clearance floor (TCF) warning function are studied,and the corresponding simulation design is realized.Digital elevation model (DEM) data is used as the terrain database in the forward terrain simulation,the terrain grid is divided according to the display accuracy set,and the highest terrain within the grid is judged.The terrain scanning results are collected and transmitted to the display system,with the terrain data transmission protocol.In order to show the intuitive simulation results,the terrain display and alarm display interface are drawn by using VPS XT software,and the simulation sensor parameters of the simulator are taken as the system input to verify the correctness of EGPWS system functions including terrain alarm and display.