摘要
高重频激光对激光半主动制导导引头的干扰效果与导引头的信息处理能力和干扰信号的样式密切相关。设计了一套激光半主动制导对抗半实物仿真实验系统，从信号级研究了导引头的工作原理并设计了多种抗干扰算法进行信号处理，提供了信号级干扰效果评估方案，为从原理上深入探讨对激光导引头的干扰效果提供了完整的实验平台。在导引头搜索阶段重点研究了高重频激光对导引头编码识别过程的影响。在导引头跟踪阶段，通过受干扰前后四象限探测器输出目标位置的变化，研究了干扰频率、能量、位置、干扰时机，以及导引头的脉冲峰值检测、首脉冲处理、码型和时间波门等不同抗干扰条件对干扰效果的影响。实验结果表明，干扰脉冲的能量越大、干扰源与目标的夹角越大干扰效果越明显，提高干扰激光脉冲的频率会增大干扰成功的概率，缩小导引头时间波门的宽度会提高导引头的抗干扰能力。
The jamming effect of semi-active laser seeker induced by high-repetition-rate laser is influenced by the seeker＇s signal processing ability and the jamming laser＇s characteristics. For the first time, a HWIL experimental platform on signals of the quadrant detector is designed to make a deep and detailed investigation to the essence of the jamming mechanism, which aimed at the influences of the high-repetition-rate laser on the seeker＇ s signal processing. The evaluation method for electro-optic countermeasure effect is put forward. The jamming success rate is evaluated by the statistical method that is out of 3~r means jamming success. In the searching stage, much attention is paid to the jamming in the seeker＇s decoding. In the track- ing stage, different factors concerned with jamming effect are studied via the changes of target＇ s position given by the quadrant detector. The jamming test is concerned of two kinds of fac- tors. One is the jamming laser＇s parameters, such as jamming laser＇s frequency, energy, po- sition, and the occasion to perform countermeasures. The other is the seeker＇ s conditions, such as the seeker＇ s pulse peak detecting, the first pulse identifying, laser pulse decoding, time gate, and so on. The test results show that with larger jamming energy, bigger angle be- tween jamming laser and seeker, and higher frequency, there will be a more distinct jamming effect. Moreover, the seeker with short-time-gate will have strong anti-jamming capability.
出处
《电子对抗》
2014年第1期37-41,48,共6页
Electronic Warfare
关键词
高重频激光
激光导引头
干扰机理
干扰效果
high-repetition-rate laser
laser seeker
jamming mechanism
jamming effect
