基于宽带扫频的导弹RCS测量与分析

Measurement and Analysis of RCS of Missile Based on Broadband Swept Frequency

摘要:

针对导弹的典型几何外形结构,基于高频散射机理对其散射特性进行了初步分析,包括散射源分布及其散射类型、各散射源散射特性随导弹姿态的变化趋势等;接着,利用宽带扫频RCS测量系统对导弹L、X波段RCS和X波段一维距离像进行了测量,得到了导弹在不同技术条件下的RCS曲线和一维距离像;最后,对测量结果进行了初步分析;测量结果表明:导弹头锥仓与进气道腔体存在较大散射,尤其是进气道壁与弹体之间连接缝隙的散射较为突出；导弹在X波段下的RCS较L波段小,且受姿态变化的影响更为敏感；另外,导弹RCS峰值点并未出现在迎头向,而是偏离迎头向一定角度,尤以X波段下最为明显,偏离角度达20°左右;测量结果为导弹在试验中的应用,包括试验设计、试验结果分析与评估、等效推论等提供了重要的技术依据。

Abstract:

Based on the theory of high frequency scattering, the scattering characteristics of the typical structural missile are analyzed, such as distributing of the scatterers, scattering type, variation tendency of the scattering intensity with missile attitude, and etc. Next, the L-band and X-band RCS of the missile are obtained using the broadband swept frequency RCS measurement system. Finally, the paper studies on the measurement results. The result indicates that the RCS of the warhead and the inlet are obvious, especially the gap between the inlet surface and the missile surface. The RCS in X-Band is small and more sensitive with the variation of missile attitude than that in L-Band. Furthermore, the maximum RCS occurs not at the head-on but the other direction, especially in X-Band, and which is nearby twenty degree. The result can provide technical bases for the application in the test of the missile, such as test design, analysis and evaluation of test results, equivalent calculation, and etc.