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缺陷类目标散射在高隐身飞行器总体散射中占有重要地位。目前常用的缺陷类目标散射评估方法是基于低散射载体,将有无缺陷类目标的载体测试结果进行对比,获得缺陷类目标散射的增幅,以分析目标的散射特性。这种方法存在载体影响大、可测量目标尺寸小、成本高等不足。本文提出一种基于矢量对消的改进试验方法,将载体视为目标背景的一部分,通过矢量对消分离出载体散射,从而提取出完全独立于载体之外的全角域范围的缺陷类目标散射特性,结果更为完整、精确。通过文献对比和验证分析,本文方法可以得到缺陷类目标的全角域散射特性,且测试结果、目标尺寸均不受载体限制,具有精确度高、成本低的优点。
Defect-like object scattering plays an important role in the total scattering of high-stealth aircraft. At present, the commonly used method of defect-based target scattering assessment is based on the low-scattering carrier, comparing the carrier test results with and without defect targets, and obtaining the increase of the target scattering of the defects to analyze the scattering characteristics of the target. This method has the influence of the carrier, the measurable target size is small, the cost is high and the like. In this paper, an improved test method based on vector cancellation is proposed. The carrier is regarded as a part of the target background, and the carrier scattering is separated by vector cancellation to extract the defect-like target scattering characteristics completely independent of the full-range domain of the carrier , The result is more complete and accurate. Through literature comparison and verification analysis, the method of this paper can get the full-range scattering characteristics of target defects, and the test results, the target size are not subject to carrier constraints, with the advantages of high accuracy and low cost.