一种小型化仪表着陆系统信号模拟器研制

针对传统的仪表着陆系统(ILS)信号模拟器智能化程度低、可靠性不高、携带不方便的缺点,设计了一种体积小、功耗低、精度高的仪表着陆信号模拟器.采用数字信号处理技术由FPGA完成多种音频调制信号的合成,利用具有幅度调谐功能的DDS合成载波信号,使用组合衰减技术实现输出电平在大范围内连续可调,满足了仪表着陆系统信号格式及输出需求.信号模拟器实现了航向、下滑与指点信标的信号模拟.整机性能经测试符合技术指标要求,现已经小批量推广应用,市场前景很好.

Development of a Miniaturized Instrument Landing System Signal Simulator

In order to overcome the shortcomings of traditional instrument landing system (ILS) signal simulator,such as low intelligence,low reliability and inconvenient to carry,an instrument landing signal simulator with small size,low power consumption and high precision is designed.The synthesis of a variety of audio modulation signal is implemented on FPGA by digital signal processing technology,the carrier signal is synthesized by using DDS with amplitude tuning function,the output level which is continuously tunable in a large dynamic range is achieved by combination of attenuation technology,all of them meet the requirements of signal format and output level of instrument landing system.Signal simulator implements the localizer,glide slope and marker beacon signal simulation.The machine performance tests in accordance with the technical requirements,now the signal simulator has been small batch promoted,the market prospect is very good.