据统计,飞机的大多数重大事故发生在进场阶段。进场和着陆制导系统对保证飞机安全、使其不受恶劣气象条件的影响是很重要的。因此,国内外军事和民用航空部门对研制全天候着陆系统都很重视。目前国际上自动着陆系统发展很快,先进的微波着陆系统逐渐取代仪表着陆系统,这种非自主式的着陆系统,需要地面上安装一套发射装置,机上安装一套接收设备,这就带来了不便。同时,在各种飞行阶段中,进场着陆时,飞机的操纵是困难的,尤其在能见度不良的情况下(阴天、夜间),操纵就更加困难了。为此, According to statistics, most major aircraft accidents occurred during the stage of entry. The approach and landing guidance systems are important to ensure the safety of the aircraft from the adverse weather conditions. Therefore, the military and civil aviation departments both at home and abroad attach great importance to the development of an all-weather landing system. At present, the automatic landing system in the world is developing rapidly. The advanced microwave landing system gradually replaces the instrument landing system. This non-autonomous landing system requires that a transmitting device be installed on the ground and a receiving device be installed on the aircraft, Inconvenience At the same time, the handling of aircraft is difficult at various stages of flight, when entering a landing, and maneuvering is even more difficult, especially in the case of poor visibility (overcast, nighttime). to this end,