复杂目标可视化角闪烁偏差计算

Visual computation of glint error for complex targets

角闪烁偏差是雷达跟踪扩展目标时误差产生的重要来源之一,在实际跟踪和制导中,常由于目标回波信号的角闪烁偏差而致使脱靶率大大增加,因此对角闪烁偏差的研究将有助于提高跟踪目标的准确率.在基于可视化电磁计算系统(GRECO)上,用屏幕上的每个像素代表目标的一个散射中心,将目标的散射中心的数量提高到像素级上,再利用相位梯度方法完成目标的角闪烁计算,进而提高了计算精度.选用了两球标准体进行角闪烁校模,计算结果与测量结果一致,证明了此方法的准确性.在此基础上进行复杂目标的角闪烁计算,实现了复杂目标可视化角闪烁计算系统,并分析了导弹靶标由于目标角闪烁影响而导致的脱靶概率.

The glint error is one of the important error sources in radar tracking on extended target. In practise, the lose-possibility has been risen greatly in teams of the glint error of the scattering wave in radar tracing and guiding system. So the research of glint error can improve the accuracy of tracing target. The visual method was developed to compute the glint error of complex targets by the phase gradient method in GRECO（graphical electromagnetic computing） system in high frequency region. This method made each pixel of screen as one scatter center of target and the number of scatter centers was greatly increased to the pixel level, then the result accuracy was improved and the visual computation course was implemented. The glint result of the two-ball target model was compared with the measured result and proved its validity. Meanwhile, the complex target glint was also proposed in this visual platform. And, the lose-possibility of an traced missile was also given.