Design of target support columns using EPS foam
Design of target support columns using EPS foam
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DOI：
10.1109/map.2003.1189667
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发表时间：
2003-03
影响因子：
3.5
通讯作者：
J. Berrie;G. L. Wilson
中科院分区：
文献类型：
--
作者：
J. Berrie;G. L. Wilson
当在地面反弹范围内进行RCS测量时，EPS泡沫柱经常被用作测试体和飞行器的目标支撑。由于在大尺度RCS测量中很少使用背景扣除来抑制泡沫柱散射，因此柱必须结构合理，同时在所关注的方位角和雷达频带上保持最小化的RCS特征。目标是设计一个在测量数据中不明显的列，但足够强大以支持指定的重量。影响EPS泡沫柱散射的主要因素是成型，找到特定测试的最佳形状并非易事。本文第一部分介绍了EPS泡沫塑料柱的设计和施工方法。主题包括EPS材料特性的确定，柱几何形状的数学规范，柱力学和散射的准确和有效的计算，以及柱参数的有效优化。本文的第2部分显示了在NRTF进行的柱RCS预测值与柱测量值的比较。这些比较给出了泡沫柱建模和地面反弹距离散射模拟的概念的可信度，并给出了泡沫柱设计过程中靶场工程师的信心。
When making RCS measurements on a ground-bounce range, EPS foam columns are frequently used as target supports for test bodies and air vehicles. Since background subtraction is rarely used to suppress foam-column scattering in large-scale RCS measurements, the columns must be structurally sound while maintaining a minimized RCS signature over the aspect angles, and radar frequency band, of interest. The goal is to devise a column that is unnoticeable in the measured data, yet strong enough to support a specified weight. The major factor that contributes to EPS foam-column scattering is shaping, and finding the optimal shape for a particular test is not trivial. Part 1 of this paper describes methods in the design and construction of EPS foam columns. Subjects include determination of EPS material properties, mathematical specification of column geometries, accurate and efficient computation of column mechanics and scattering, and effective optimization of column parameters. Part 2 of this paper shows comparisons of predicted column RCS to column measurements performed at NRTF. These comparisons give credibility to the concept of foam-column modeling and ground-bounce range scattering simulations, and give range engineers confidence in the foam-column design process.