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为提高反直升机雷弹的毁伤概率，必须研究雷弹飞行弹道与直升机飞行轨迹的交会问题，根据直升机的飞行航线、高度和速度以及雷弹的初速，确定雷弹发射的方位角、俯仰角以及时间提前量．该文详细讨论了反直升机智能雷弹的飞行弹道及其工作原理，对地面声传感器的接收信号进行了频谱分析与相关分析，采用了自适应时延估计技术对直升机目标进行定位．分析表明，地面声传感器的接收信号是高度相关的，在待估计的时延范围内，互相关函数具有单一最大值，利用均方误差最小准则和最速下降梯度技术的递归算法能够精确地估计时延，计算结果也表明，该自适应系统能够快速有效地跟踪时延随时间的变化．
In order to improve the damage probability of the anti-helicopter levitation missile, it is necessary to study the rendezvous problem between the flight trajectory of the helicopter and the flight path of the helicopter. According to the flight path, height and speed of the helicopter and the muzzle velocity of the helicopter, the azimuth, Time advance. This paper discusses in detail the flight trajectory of the anti-helicopter intelligent lightning projectile and its working principle. The spectrum analysis and correlation analysis of the received signal of the ground acoustic sensor are carried out. The adaptive time-delay estimation technique is used to locate the helicopter target. The analysis shows that the received signals of ground acoustic sensors are highly correlated, and the cross-correlation function has a single maximum within the delay range to be estimated, and the recursive algorithm using the minimum mean square error criterion and the steepest descent gradient technique can accurately estimate Delay, the results also show that the adaptive system can quickly and effectively track the changes with time delay.