调幅式红外导引头干扰机理  

Jamming of the amplitude modulation infrared seekers

作　　者：钱方[1,2] 郭劲[1] 邵俊峰[1,2] 王挺峰[1] 

机构地区：[1]中国科学院长春光学精密机械与物理研究所激光与物质相互作用国家重点实验室,吉林长春130033 [2]中国科学院大学,北京100049

出　　处：《红外与激光工程》2013年第6期1432-1436,共5页Infrared and Laser Engineering

基　　金：国家重点实验室自主基础研究课题(SKLLIM1004);院地合作长吉图专项基金(2011JT0006);吉林省科技发展计划项目(20126015)

摘　　要：基于调制盘的红外制导导弹严重威胁战机的生存,需要开展机载红外对抗技术研究以保护战机的自身安全。以旭日升型调幅式调制盘为例,介绍了调制盘的工作原理,分析了中波红外激光干扰调制盘的机理,使用MATLAB模拟了不同幅度、频率、相位的调制脉冲信号对调制盘系统的干扰情况。结果表明:干扰光强度与目标辐射强度之比从1提高到10时,方位角误差由3.6°变为14.4°,失调角误差由2.4°变为10.8°。当干扰信号角频率与调制盘载波频率接近时,方位角误差变为151.2°,失调角误差变为28.4°。单纯增加干扰光的强度对实现干扰贡献不大,会增加调制盘系统接收信号的强度,易暴露目标。幅值缓变的干扰信号虽然能使调制盘导引头的接收信号出现偏差,但不会让目标完全摆脱导弹跟踪,而角频率接近载波频率的干扰信号会使导引头接收不到准确信号,最终实现干扰。The threat of the IR guidance missile is a direct consequence of extensive proliferation of the airborne IR countermeasure. According to the operation of the amplitude modulation reticle system, the principle of the laser disturbance on modulation reticle was analyzed and the numerical simulation used MATLAB based on a rising-sun reticle was done. When the ratio of jamming energy to target radiation increased from 1 to 10, the azimuth error changed from3.6° to 14.4° and the misalignment angle error changed from 2.4° to 10.8°. When the jamming angular frequency was equal to the cartier frequency, the azimuth error was 151.2° and the misalignment angle error was 28.4°. The results show that simply increasing the intensity of the jamming light achieves little. It will increase the received signal strength of the amplitude modulation reticle system and the target will be more easily exposed. A slow variation of the amplitude will warp the azimuth information received by the seeker, but the target can＇t be completely out of the missile tracking. If the jamming signal＇s angular frequency is close to the carder frequency of the reticle system, the seeker will can＇t receive an accurate signal and the jamming can be achieved.

关 键 词：机载红外对抗 光电制导 调幅调制盘 干扰机理 

分 类 号：TN248.1[电子电信—物理电子学]