一、概述在导弹试验再入落区,由于弹头弹体的分离,及弹体和剩余燃料的爆炸,将形成群目标,其中有真目标(弹头),也有为数众多的碎片。由于大气对重阻比不同的物体有不同的阻力,真目标的空气动力学性能好,受阻力小,飞行速度快;弹体碎片的重阻比大,受空气阻力后,速度变慢,这样,真目标和假目标又将逐渐分开,最后使真目标从假目标群体中分离出来,这一复杂的变化过程,对红外跟踪测量系统的要求是:当真假目标形成群体时,要求红外系统自动跟踪目标群体,当真目标和假目标群 I. Overview At the missile reentry zone, the separation of the projectile body and the explosion of the projectile and the remaining fuel will form a group target with true targets (warheads) and a large number of debris. Since the atmosphere has different resistances to heavy objects than different objects, the aerodynamic performance of the true target is good, the resistance is small, and the flying speed is fast. The weight resistance ratio of the projectile fragments is large, and the speed is slowed down by air resistance , The true target and the fake target will be gradually separated again, and finally the true target will be separated from the fake target group. The complicated change process requires the infrared tracking and measurement system to be: when the real and fake target form a group, the infrared system Automatically track the target group, the real target and the fake target group