某型飞机进入自动着陆后瞬间退出问题的分析与解决

摘要

论文针对某型飞机在返场飞行着陆过程中，通信导航识别分系统（以下简称通导系统）由 FAF-TACAN （塔康）导航方式转到 LAND-MLS（微波着陆）方式，自动飞行控制系统（以下简称飞控系统）出现进入“自动着陆”瞬间后又退出现象。通过视频回放、数据分析及地面试验验证，发现通导系统中的中央控制设备（以下简称 CCU ）在向飞控系统传输MLS 方位偏差和下滑偏差数据时，出现“有效—无效—有效”的变化过程，即对应飞控系统进入“自动着陆”状态后又瞬间退出的过程。经多次试验分析，查明了故障原因，制定了解决措施，为飞行安全及飞机顺利转场提供了有力的保障。%Aiming at automatic flight control system enters “automatic landing” instant exit phenomenon ,the communi-cation navigation system switches to LAND-MLS pattern from FAF-TACAN navigation pattern when the aircraft is landing . Through video playback ,data analysis and ground test verification ,the change process of “effective-invalid- effective” corre-sponding to the process of the flight control system enters “automatic landing” instant exit when the central control equip-ment of the communication navigation system transfers MLS azimuth deviation and decline deviation data to flight control sys -tem .The causes of failure are identified and solutions are formulated through many test analysis ,it guarantees the flight safety and the aircraft transition .