仪表着陆系统的航道调整仿真系统研究

Research on channel adjustment simulation system of instrument landing system

仪表着陆系统(ILS)为飞机安全着陆提供重要的保障。针对现如今日益递增的航班数量,如何确保ILS高效、安全的运行已成为民航部门面临的重要问题。通过对调制深度差(DDM)的理论分析、研究,得出了影响DDM的主要因素是调制度因子m90,在此基础上,采用控制变量法和最小二乘法分别建立了航道和调制度因子和载波负值的数学模型。基于NM7000设备搭建了可动态模拟航道调整过程的仿真系统。最后将所建立系统与实际情况进行对比分析,验证所建立模型的准确性,数据表明,仿真相对误差小于1%,说明所提模型精度较高,可以为空中管制人员的参考依据提供理论支持。

The instrument landing system provides an important guarantee for the safe landing of aircraft.In view of the increasing number of flights,how to ensure the efficient and safe operation of ILS has become an important issue for the civil aviation department.Through theoretical analysis and research on modulation depth difference(DDM),it is concluded that the main factor affecting DDM is modulation factor m90.On this basis,the mathematical models of channel and modulation factor and carrier negative value are established by using control variable method and least square method respectively.Based on NM7000 equipment,a simulation system was built to dynamically simulate the channel adjustment process.Finally,the accuracy of the model was verified by comparing the established system with the actual situation.The data showed that the relative error of simulation was less than 1%,indicating that the proposed model was of high accuracy and could provide theoretical support for the reference of air traffic controllers.