基于多普勒盲区的低空突防航线规划

预警机雷达为了完成在地物杂波背景下的目标探测,通常采用脉冲多普勒(pulse Doppler, PD)体制,而多普勒盲区是PD体制雷达的固有问题。在分析地物杂波特性和多普勒盲区形成机理的基础上,提出了一种基于多普勒盲区的低空突防航线规划方法,并给出了固定时间步长的搜索方法对该规划进行求解。沿此航线的战机利用多普勒盲区可实现相对于预警机雷达的“隐身”,而低空飞行又可有效规避地面雷达的探测,因此该航线可以大大提高战机突防的成功率。仿真实验结果验证了本文提出的基于多普勒盲区的低空突防航线规划方法的正确性及有效性。

Flight planning of low-altitude penetration based on Doppler blind zone

To complete target detection under the background of surface clutter, airborne early warning (AEW) radar commonly adopts the pulse Doppler (PD) system. However, the problem about the Doppler blind zone cannot be ignored. Based on the analysis of the character of surface clutter and the formation mechanism of the Doppler blind zone, a model for flight planning of low-altitude penetration is established. A fixed-time-step searching method is adopted to solve the model. On the route the fighter is invisible relative to the AEW radar using the Doppler blind zone. Moreover, low-altitude flight can avoid the detection of the radar above ground. Therefore, the route greatly increases the success rate of the fighter’s penetration. The simulation results demonstrate the correctness and effectiveness of the developed method for flight planning of low-altitude penetration based on the Doppler blind zone.