基于高频渐近方法的导弹目标群动态RCS 仿真

针对导弹目标群的动态RCS 仿真问题，该文提出一种基于高频渐近理论的高效预估方法。该方法基于最小能量弹道仿真得到弹头、诱饵和助推级等群目标的弹道，在测量雷达坐标系下解算得到各时刻目标的位置和姿态，建立分离过程的目标群动态场景，并利用物理光学法(PO)、等效边缘流法(EEC)和射线弹跳法(SBR)计算目标群的镜面反射、边缘绕射和多次反射贡献获得动态RCS 数据。与采用静态全极化数据的常规插值方法获取的RCS数据对比分析表明，在场景中各目标距离较远且无相互遮挡时，两者吻合；当目标群密集分布存在相互遮挡时，插值方法实现难度大大增加，而该文方法仍能快速得到有效的结果。 

Dynamic RCS Simulation of a Missile Target Group Based on the High-frequency Asymptotic Method

To simulate dynamic Radar Cross Section (RCS) of missile target group, an efficient RCS prediction approach is proposed based on the high-frequency asymptotic theory. The minimal energy trajectory and coordinate transformation is used to get trajectories of the missile, decoys and roll booster, and establish the dynamic scene for the separate procedure of the target group, and the dynamic RCS including specular reflection, edge diffraction and multi-reflection from the target group are obtained by Physical Optics (PO), Equivalent Edge Currents (EEC) and Shooting-and-Bouncing Ray (SBR) methods. Compared with the dynamic RCS result with the common interpolation method, the proposed method is consistent with the common method when the targets in the scene are far away from each other and each target is not sheltered by others in the incident direction. When the target group is densely distributed and the shelter effect can not be neglected, the interpolation method is extremely difficult to realize, whereas the proposed method is successful.