无人机信息链路电磁干扰效应规律研究

Effects of Electromagnetic Interference (EMI) on Information Link of UAV

通过对无人机电磁干扰耦合路径分析,建立了信息链路电磁干扰理想模型,讨论了电磁干扰对数据链系统工作信号的压制作用.以某型无人机装备数据链系统为研究对象,提出了一种基于无人机动态飞行的信息链路实验室模拟方法,搭建了数据链电磁干扰注入效应试验系统,分析并确定了电磁敏感度判据.通过无人机上行数据链系统连续波电磁干扰注入效应试验,找到了敏感频点和电磁敏感阈值,分析了信息链路电磁干扰作用机理,探索了失锁效应与AGC电压、误码率之间的内在规律,为靶场实验和无人机电磁干扰预测提供了经验.

Highly integrating with electronic system and depending on information link,unmanned aerial vehicle(UAV)is vulnerable to external electromagnetic interference(EMI).Due to the large-scale application of UAV in modern electronic warfare,its electromagnetic safety poses a serious challenge.In this paper,analyzing the coupling path to electromagnetic interference,an ideal model of UAV information link to EMI was established to studying the suppression of EMI on work signal of the data link system.Firstly,taking a kind of UAV data link system as the research object,a ground simulating test method was proposed for UAV information link in dynamic flight.Then an experimental system was established to study the EMI injection effect of data link system,and to get the electromagnetic sensitivity criterion.Finally,a series of continuous wave EMI injection experiments were carried out for UAV uplink system.Based on the experiment results,the sensitive frequencies and their electromagnetic sensitivities were found,the mechanism of electromagnetic interference for information link was analyzed,and the relationship among the effect of lost-link,automatic gain control(AGC)voltage and bit error rate(BER)was achieved.The research results can provide an experiential reference for range experiment and electromagnetic interference prediction of UAV.