基于体目标相对稳定散射中心的脱靶量估计方法

主要针对无尾翼导弹弹头类体目标，研究其体目标效应对多普勒雷达脱靶量测量所引入的误差问题，提出了一种适用于该类目标典型散射特性的脱靶量精确测量方法，可用于脱靶量测量的评估。通过对无尾翼导弹弹头目标的体散射特性研究，分析了该类目标散射中心成因及随姿态角变化的影响，找出体目标上相对稳定散射中心，并利用该独立散射中心的多普勒频率曲线估计标量脱靶量，从而有效避免了由体散射效应而造成的多普勒频率估计野值的影响，可获得更为精确的测量结果。最后对所提方法的测量结果进行了仿真验证，证实了该方法的有效性。

Miss distance measurement based on stable scattering centers of extended targets

Miss distance measurement of missile warheads without empennages is introduced.The estimation error in miss distance measurement induced by the body scattering effect of this type of targets is studied in detail and a method for miss distance measuring based on stable scattering centers of extended targets is presented. Based on the investigation in physical mechanism of scattering centers and their changes with incident directions, stable scattering centers are found out and used to estimate the miss distance through the Doppler frequency variation, which can effectively avoid the wild value of Doppler frequency and lead to more accurate result than common methods. The simulation based on a full-wave numerical method is implemented and the simulation results verify the effectiveness of this method.