无翼平底弹头的属性散射中心模型改进与参数估计

Modification and Parameter Estimation of Attributed Scattering Center Model for Flat-Based Warhead Without Wings

针对传统属性散射中心模型在描述散射中心幅度随方位的变化存在不足,本文依据目标的逼真散射数据对属性散射模型中的方位依赖关系进行了修正,并通过图像匹配结合遗传算法对散射中心的各个参数进行了估计.为了验证模型的有效性,文中给出了修正模型的仿真结果与传统模型仿真结果以及全波法计算结果的比较.结果表明,相对于传统的属性散射中心模型,改进后的模型能更准确地描述真实散射中心的幅度随方位的变化关系.

There are deficiencies in attributed scattering model to describe the orientation dependence on the amplitude of scattering centers.A modification was proposed for this scattering model based on the characteristics of scattering field in this paper.To validate the modified model,an approach was presented based on genetic algorithm and image matching method for estimating the parameters of the scattering center,and then the simulated signal by using this model and estimated parameters were compared with the one by using previous model and data computed by full-wave numerical method.The results show that the modified model is superior to the previous model in more precisely describing the orientation dependence of scattering centers.