高重频激光对激光导引头干扰过程的建模研究

Modeling the interference process of laser seeker with high-repetition laser

为有效评估高重频干扰对激光导引头的干扰效能,建立了锁定跟踪阶段的波门诱偏的干扰模型。研究了波门宽度、干扰频率、编码方式、脉冲锁定方式等因素对干扰效能的影响。首先,分析导引头抗干扰技术——时间波门技术、脉冲锁定技术和脉冲编码技术。接着,建立锁定跟踪阶段高重频激光对激光导引头的干扰模型。最后,基于成功诱偏波门数分析不同干扰因素对激光导引头干扰过程的影响。仿真结果表明:波门宽度、干扰频率对干扰效果有较大影响,波门宽度越宽,干扰频率越高,干扰效果越好;单位波门内干扰脉冲的数量越多,干扰效能越好;当单位波门内干扰脉冲数量大于3时,高重频干扰时间小于270 ms。最优时序脉冲的抗干扰性能优于其他脉冲锁定方式。本文的研究结果对高重频干扰装备的研制和使用具有理论参考价值。

In order to evaluate the jamming efficiency of laser seeker effectively,a jamming model of wave gate decoys in the locking and tracking phase is established.The effects of gate width,interference frequency,coding mode and pulse locking mode on the jamming effect were studied.Firstly,the technologies of seeker′s anti-jamming-time gate technology,pulse locking technology and pulse coding technology are analyzed.Then,the jamming model of high-repetition laser on laser seeker is established.Finally,the influence of different interference factors on the interference process of laser seeker is analyzed based on the time gate number of successful gate decoy.The simulation results show that the gatewidth and interference frequency have great influence on the jamming effect.And the higher the frequency and the wider the wave gate are,the better the jamming effect is.The greater the number of interference pulses in the unit gate,the better the interference efficiency.When the number of interference pulses in the unit gate is greater than 3,the interference time of high frequency repetition is less than 270 ms.The anti-interference performance of the optimal timing pulse is better than that of other pulse locking methods.The research results of this paper have theoretical reference value for the development and use of high frequency interference equipment.