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前置激光引信发射系统的脉冲红外激光先到达目标,而后回波的激光脉冲信号又到达光敏管激光探测接收器表面,在超音速条件下要依次穿过附面层-剪切层-激波-大气层-激波-剪切层-附面层,最后聚焦在光敏面上。由于激波对前置激光引信在激光光路中的影响,从而使在静态下采用的一些距离判定方法与实际飞行过程中的应用有较大的偏差。提出了超音速条件下激波对前置式激光引信光程影响的模型,并以某弹型进行光程差分析,使用Matlab计算出不同的弹速下光程的差值,为超音速下激光引信或激光武器的探测提供了一种可行的误差分析方法。
The pulse infrared laser of the front laser fuze transmitting system reaches the target first, and then the laser pulse signal of the echo reaches the surface of the photosensitive tube laser detecting receiver, and then passes through the surface layer-shear layer-shock wave - Atmosphere - shock wave - shear layer - surface layer, and finally focused on the photosensitive surface. Due to the influence of the shock wave on the laser light path of the pre-laser fuze, some methods of determining the distance used in the static state are greatly deviated from the actual flight application. A model of the influence of shock wave on the optical distance of the front-type laser fuze under supersonic condition is proposed. The optical path difference analysis is performed with a spring type, and the difference of the optical path length under different projectile velocities is calculated by using Matlab. The detection of laser fuzes or laser weapons provides a viable method of error analysis.