脉冲激光引信的云雾回波波形特征仿真研究

Study on Cloud Echo Waveform Characteristics of Pulsed Laser Fuze

文章基于Mie散射理论和Monte Carlo方法,建立脉冲激光引信在云雾中的探测模型,仿真获取云雾中无目标和云雾中有目标两种场景下脉冲激光引信的云雾回波,分析云雾中无目标时云雾回波的波形特征、云雾中有目标时回波双峰现象的出现规律,结果表明:云雾中无目标时,云雾回波波形相较于发射激光波形出现了畸变与展宽,回波波形呈现出上升沿陡、下降沿缓的非对称特征,且发射激光脉宽越窄,回波波形的展宽程度越大、非对称性越明显;云雾中有目标时,窄脉冲激光比宽脉冲激光有更大的几率分离出目标回波和云雾回波。本文研究成果为探索提高脉冲激光引信在云雾环境中探测性能的方法提供了理论依据。

This paper established a detection model of pulsed laser fuze in cloud based on Mie scattering theory and Monte Carlo method,and simulated the echoes when there is no target in cloud and mixed echoes when there is a target in cloudy and analyzed the characteristics of echo waveform.The results show that:when there is on target in cloud,cloud echo is distorted and broadened compared with the emission laser,and show a steep rise and a gentle fall.The larger the laser pulse width,the larger the echo width increase is,the more obvious the echo waveform asymmetry is.When there is a target in cloud,narrow pulsed laser has a higher probability of separating target echo and cloud echo than wide pulsed laser.The above results provide a theoretical basis for exploring methods to improve the detection performance of pulsed laser fuze in cloud.