增强型近地警告系统前视预警算法设计与仿真

Design and Simulation of Terrain Awareness Alerting Arithmetic in Enhanced Ground Proximity Warning System

增强型近地警告系统(EGPWS)是重要的航空机载安全系统。针对EGPWS中的重要组成部分——前视预警模块的组成框架、地形库设计、报警算法进行了研究。完成了基于正方形网格建模方法的地形数据库的设计,建立了前视预警的数学模型,重点推演了直接判断法的预警算法及其基于二次数据缓存技术的改进算法。以高逼真度飞行仿真软件FLSIM为工具,设计并实现了EGPWS仿真系统.仿真试验结果表明,所研究的前视预警算法快速、可靠,能满足增强型近地警告系统的设计需求。

EGPWS （Enhanced Ground Proximity Warning System） is a vital airborne system for flight safety. Important parts including the structure of awareness alerting module in EGPWS, the terrain database design and alerting algorithm were researched. Terrain database based on Grid model was achieved and the mathematical model of awareness alerting was built. Direct judging algorithm-one of Awareness alerting algorithms was proposed and improved by the secondary data cache technology. Simulation system of EGPWS was designed and fulfilled based on the software package with high fidelity flight tool-FLSIM. It is proved by simulation test that proposed awareness alerting algorithms is fast and credibility. It can meet the design requirement of EGPWS.