ILS机载设备功能验证模型构建与仿真

Construction and Simulation for Functional Verification Model of ILS Airborne Equipment

在航电任务系统地面功能验证过程中,围绕仪表着陆系统(Instrument Landing System, ILS)的逻辑建模、几何建模与程序仿真,深入分析了ILS的工作原理,建立其在三维空间运行的几何模型,通过程序化仿真其与飞机位置的相对运行过程,计算得出水平航向引导和垂直下滑引导的动态数据。该模型计算数据既能够作为激励数据源,支持航电系统中ILS和显控等机载设备的交联验证,也可作为仿真设备代替机载ILS设备独立工作。经过分析,该方法同样适用于微波着陆系统(Microwave Landing System, MLS)的功能验证工作,并能够根据需要开展CATⅠ/Ⅱ/Ⅲ类多个等级条件下的盲降测试,对提高实际检验效率具有极大的应用价值和推广前景。

In the process of ground function verification of the avionics mission system,the working principle of instrument landing system(ILS)is deeply analyzed around the logic modeling,geometric modeling and program simulation of the ILS to establish ILS geometrical model running in 3D space.The dynamic data of the horizontal course guidance and vertical glide guidance are calculated through the program simulation of the relative running process of the ILS versus the airborne position.The model calculation data can be used as incentive data source to support the interactive verification of the airborne equipment,such as the ILS and the special display unit(SDU)in the avionics system,and can also be used as the simulation equipment to replace the airborne ILS equipment for independent operation.The method can also be applied to the function validation of the microwave landing system(MLS),and can carry out blind landing test under multiple levels of CATⅠ/Ⅱ/Ⅲconditions as need,which has great application value and extension prospect for improving the actual validation efficiency.