基于模糊层次分析法的导弹阵地防护效能评估

运用层次分析（AHP）与模糊数学相结合的方法进行效能评估，建立了导弹阵地的评价指标体系以及三级模糊评判模型，确定了各评价指标的权重，提出了导弹阵地防护效能的量化评判方法。     

Rolling Control Characteristic Experimental Investigation of a Canard Missile with Free-Spinning Tail

A canard configuration is one of basic aerody-namic configurations for guided missile.From anaerodynamic viewpoint,canard effectivenessincreas-es with increasing angle-of-attack(AoA);canardhinge moment is typically smaller thanthe hinge mo-ment for anequivalent tail fin;andcanards reducethetransonic stability rise.From a system design viewpoint,canards can be located near the inertial mea-surement unit(I MU)and flight computer;therebyeli minating the need to route cables to the rear of theai…     

虚拟战场环境的导弹可视化仿真设计

主要对多模复合制导仿真平台中的导弹视景仿真模块的实现方法进行了研究,介绍了仿真模块的组成,研究了三维物体建模的方法并讨论如何实现动态演示。对基于VC＋＋以OpenGL编程建模仿真和采用Creator、Vega实现作战导弹飞行可视化这样两种方法,概括阐述了其实现过程,并进行了分析比较,得到了适用于导弹飞行仿真控制的设计方法,对于其它场景下三维物体仿真具有一定的借鉴作用。     

Sintering behavior and morphology control of porous Al2O3-SiO2 ceramics for radome applications

Ceramics from porous Si₃N₄ and its derivatives SiAlON and Si₂N₂O were once considered the most promising high-temperature wave-transmitting materials. However, their large-scale application in the field of radomes is greatly restricted due to their poor oxidation resistance, high preparation costs, and expensive raw materials. Therefore, the development of low-cost porous oxide ceramics remains of significant interest to the field of high-temperature wave transmission. Surprisingly, mullite ceramics, which are representative of the Al₂O₃-SiO₂-system of ceramics, are ultra-low-cost materials with the potential to replace ceramics from Si₃N₄ and its derivatives. In this paper, integrated porous Al₂O₃-SiO₂-system ceramics were successfully prepared for load-bearing/wave-transmitting applications, using inexpensive calcined kaolin and alumina powder as the main raw materials. Calcined kaolin can provide seeds for the growth and development of mullite crystals in the ceramic system. High-strength and high-porosity ceramics were obtained with the mullite morphology controlled through the molar ratio of Al₂O₃ to SiO₂ and the resulting content of mullite seeds. With increasing of mullite seed content, the length and radial width of mullite whiskers with “interlocking structure” gradually change from rod-shaped “long and thick” to needle-like “short and thin.” The prepared porous Al₂O₃-SiO₂ ceramics have high flexural strength, fracture toughness, and good dielectric properties.     

某型导弹自驾仪的故障诊断研究

模拟电路的故障诊断存在着信号非线性、样本初期获取困难等问题,支持向量机技术具有小样本、非线性、全局最优和建立的模型能更好泛化等诸多优点,为解决这些问题提供了一条有效途径。以某型导弹自驾仪中电路为典型例子,在C-SVM基础上构建模糊支持向量机,并采用粒子群算法与遗传算法进行向量机的参数优化。首先采用小波包分解提取故障信息的特征向量并归一化,然后将训练集送入改进后的向量机中完成训练,最后将测试集送入训练好的向量机中完成不同故障模式的识别,故障检测率达到93.3333%。结果表明在样本量较少的情况下,改进后的支持向量机可以很好地完成故障诊断任务。     

三维中空复合材料在天线罩上的应用研究

介绍了天线罩使用环境,天线罩材料应满足的要求(介电性能、力学性能、三防寿命、工艺性能、重量等),透波材料的选取和三维中空复合材料。对比了各种增强纤维的性能、常用树脂的介电性能、夹芯材料性能以及中空夹芯结构与实心玻璃钢结构天线罩性能,充分体现了三维中空结构的天然结构优势。     

亚音速飞行器往复式滑翔增程弹道设计

为增加亚音速巡航导弹的有效航程,提出一种往复式滑翔增程弹道方案。基于已有的气动参数建立水平直飞巡航弹道与往复式滑翔巡航弹道模型,对比分析2种弹道方案的有效航程及其特性,从能量守恒角度出发研究往复式滑翔的增程原理。进一步研究初始飞行马赫数、初始弹道倾角以及初始飞行高度对往复式滑翔弹道增程特性的影响。研究结果表明:往复式滑翔弹道能够有效增加导弹航程,相比于常规水平直飞弹道的最大飞行距离,往复式滑翔弹道的增程效率达到100.42%; 在往复式滑翔弹道能够成功的前提下,初始飞行马赫数越大,初始弹道倾角越小,初始飞行高度越低,往复式滑翔弹道的增程效率越明显。     

球型毫米波金属桁架天线罩研究

从球形毫米波天线罩的空间分块设计、金属桁架和连接节点设计、透波窗口设计以及安装架设方式等方面进行了详细论述,并通过一直径7 m、工作在20 GHz的金属空间桁架天线罩的设计实例和实验研究,证明文中所用方法行之有效,可推广应用于各种大型天线罩的电性能分析和选形设计。     

两点源诱偏ARM的效能评估模型研究

两点源诱偏是对抗反辐射导弹(ARM)的一种有效的手段。首先采用数学方法研究了两点源诱偏反辐射导弹的原理,讨论了两点源诱偏作用下被动雷达导引头的瞄准方向,给出了两点源诱骗反辐射导弹的脱靶距离模型和案例分析,为研究靶场诱偏系统的试验方法和使用原则奠定了基础。     

雷达罩对机载脉冲多普勒雷达的性能影响分析

雷达罩会降低机载脉冲多普勒(PD)雷达的性能。评估雷达罩对其性能影响是机载PD雷达设计过程中必不可少的环节。首先分析雷达罩对雷达天线方向图的影响,包括增益下降、波束变宽、波束偏转、副瓣抬高、产生镜像瓣和零深电平抬高等,然后分析天线性能下降对机载PD雷达的性能影响。通过仿真进一步分析了天线副瓣、镜像瓣对雷达中、低重频模式的性能影响。最后给出结论,天线罩会降低机载PD雷达的测距、测角性能。