弹载卫星导航设备电磁干扰治理技术  

Electromagnetic Interference Control Technology for Satellite Navigation Equipment on Missile

作　　者：石现 梁旗 蔡克荣 杨昌达 葛宇航 张泽凯 于峰 季飚 SHI Xian;LIANG Qi;CAI Kerong;YANG Changda;GE Yuhang;ZHANG Zekai;YU Feng;JI Biao(Shanghai Institute of Mechaniccal and Electrical Engineering,China Aerospace Science and Technology Corporation,Shanghai 201109,China)

机构地区：[1]上海机电工程研究所,上海201109

出　　处：《计算机测量与控制》2024年第12期216-222,共7页Computer Measurement &Control

摘　　要：随着弹载电子设备集成化发展趋势,弹上计算机、卫星导航等设备在狭小空间内功能紧密耦合,多源多频段信号传输发生干扰造成导航设备无法准确定位的现象时常发生,针对这一问题,系统研究了卫星导航设备电磁干扰治理方法;研究了微机模块中开关电源与隔离器件的电磁辐射以及谐波干扰特性;基于电磁波金属介质传播原理,通过仿真软件建立了设备电磁屏蔽有限元模型,深度剖析了屏蔽体电导率、厚度、开孔等关键因素对屏蔽效能的影响规律,提出关键元器件设计、终端天线屏蔽等综合治理方法;以弹载卫星导航产品进行试验,干扰信号强度得到了抑制,设备定位测速成功率提高了85%。With the development of integration of the electronic equipment on missile,due to the functions of microcomputer and satellite navigation module couples close in a small space,multi-source multi-frequency band signals interference with each other,which sometimes caused that the navigation equipment cannot be accurately positioned.To solve the problem,the electromagnetic interference(EMI)control methods for the integrated electronic equipment on missiles arestudied systematically.The electromagnetic radiation and harmonic interference characteristics of switching power supply and isolation devices in the circuit is studied.Based on the electromagnetic wave propagation principle in metal media,electromagnetic shielding finite element model is established by software,the influence of shield s conductivity,thickness,openings and other key factors on the shielding effectiveness are analyzed.Comprehensive approaches to EMI management such as key component design and terminal antenna shielding are proposed.A set of integrated electronic equipment is test and the results show that the interference signal intensity is reduced,the equipment positioning speed success rate is increased by 85%.

关 键 词：开关电源 卫星导航设备 有限元分析 屏蔽效能 定位成功率 

分 类 号：TP271[自动化与计算机技术—检测技术与自动化装置]