气囊辅助RTM制备复合材料承力筒内腔尺寸控制技术

根据气囊充压压力与复合材料承力筒内径之间的变化关系,给出了成型复合材料承力筒内表面的气囊尺寸计算方程。分析了气囊充压压力增大对承力筒的壁厚、纤维含量和弯曲性能的影响。采用气囊辅助RTM工艺整体制备出复合材料承力筒。试验结果表明,气囊充压压力使复合材料承力筒的壁厚减薄,纤维体积含量增加,弯曲性能提高;选择适当的气囊充压压力可以制备出满足设计要求的复合材料承力筒。     

导弹结构热防护一体化设计与优化

针对导弹面临的严酷气动热力环境,基于传统波纹夹芯结构,为导弹设计了一种兼具承载和热防护功能的一体化结构。建立热-结构耦合计算模型,对一体化结构进行结构承载与热防护性能分析,结果表明:一体化结构在高温下具有较好的承载能力;增加一体化结构隔热层与内壁厚度有助于提高导弹的热防护效率。以一体化结构热防护效率最高和质量最小为目标,采用第二代非支配排序遗传算法实现了多目标优化,并认识到:一体化结构热防护效率与质量相互影响,设计时需要需综合考虑。     

Damage of multi-layer spaced metallic target plates impacted by radial layered PELE

Three different kinds of PELE (the penetrator with lateral efficiency) were launched by ballistic artillery to impact the multi-layer spaced metal target plates. The impact velocities of the projectiles were measured by the velocity measuring system. The damage degree and process of each layer of target plate impacted by the three kinds of projectiles were analyzed. The experimental results show that all the three kinds of projectiles have the effect of expanding holes on the multi-layer spaced metal target plates. For the normal structure PELE(without layered) with tungsten alloy jacket and the radial layered PELE with tungsten alloy jacket, the diameters of holes on the second layer of plates are 3.36 times and 3.76 times of the diameter of the projectile, respectively. For radial layered PELE with W/Zr-based amorphous composite jacket, due to the large number of tungsten wires dispersed after the impact, the diameter of the holes on the four-layer spaced plates can reach 2.4 times, 3.04 times, 5.36 times and 2.68 times of the diameter of the projectile. Besides, the normal structure PELE with tungsten alloy jacket and the radial layered PELE whit tungsten alloy jacket formed a large number of fragments impact marks on the third target plate. Although the number of fragments penetrating the third target plate is not as large as that of the normal structure PELE, the area of dispersion of fragments impact craters on the third target plate is larger by the radial layered PELE. The radial layered PELE with W/Zr-based amorphous composite jacket released a lot of heat energy due to the impact of the matrix material, and formed a large area of ablation marks on the last three target plates.     

基于SWOT分析的我国海上方向空中安全形势及对策措施

海上方向是强敌对我实施战略围堵和遏制的主要方向。随着美国国防战略重回大国竞争,其遏制中国的手段推陈出新,尤其是在海空方向对我施压强度频度与日俱增。文章运用SWOT方法对我国海上方向空中安全形势进行了全面分析,认为优势体现在联合作战指挥体制、国防动员能力、列装新型防空武器等方面,劣势体现在战场建设滞后、预警探测拦截打击能力不足等方面,机遇体现在中美共识与相对稳定的周边环境,威胁体现在强敌对我的侦察威慑、空天打击、海空封锁。通过构建我国海上方向空中安全的SWOT分析矩阵,提出要进一步深化改革,加强军队与地方、平时与战时、作战力量和作战环节的“三个统筹”,发展新型防空、预警装备,以及加强沿海防空战场建设等。     

A split target detection and tracking algorithm for ballistic missile tracking during the re-entry phase

In the re-entry phase of a ballistic missile, decoys can be deployed as a mean to overburden enemy defenses. This results in a single track being split into multiple track-lets. Tracking of these track-lets is a critical task as any miss in the tracking procedure can become a cause of a major threat. The tracking process becomes more complicated in the presence of clutter. The low detection rate is one of the factors that may contribute to increasing the difficulty level in terms of tracking in the cluttered environment. This work introduces a new algorithm for the split event detection and target tracking under the framework of the joint integrated probabilistic data association (JIPDA) algorithm. The proposed algorithm is termed as split event-JIPDA (SE-JIPDA). This work establishes the mathematical foundation for the split target detection and tracking mechanism. The performance analysis is made under different simulation conditions to provide a clear insight into the merits of the proposed algorithm. The performance parameters in these simulations are the root mean square error (RMSE), confirmed true track rate (CTTR) and confirmed split true track rate (CSTTR).     

Maximizing deviation method for multiple attribute decision making under q-rung orthopair fuzzy environment

Because of the uncertainty and subjectivity of decision makers in the complex decision-making environment, the evaluation information of alternatives given by decision makers is often fuzzy and uncertain. As a generalization of intuitionistic fuzzy set (IFSs) and Pythagoras fuzzy set (PFSs), q-rung orthopair fuzzy set (q-ROFS) is more suitable for expressing fuzzy and uncertain information. But, in actual multiple attribute decision making (MADM) problems, the weights of DMs and attributes are always completely unknown or partly known, to date, the maximizing deviation method is a good tool to deal with such issues. Thus, combine the q-ROFS and conventional maximizing deviation method, we will study the maximizing deviation method under q-ROFSs and q-RIVOFSs in this paper. Firstly, we briefly introduce the basic concept of q-rung orthopair fuzzy sets (q-ROFSs) and q-rung interval-valued orthopair fuzzy sets (q-RIVOFSs). Then, combine the maximizing deviation method with q-rung orthopair fuzzy information, we establish two new decision making models. On this basis, the proposed models are applied to MADM problems with q-rung orthopair fuzzy information. Compared with existing methods, the effectiveness and superiority of the new model are analyzed. This method can effectively solve the MADM problem whose decision information is represented by q-rung orthopair fuzzy numbers (q-ROFNs) and whose attributes are incomplete.     

远距离反坦克导弹最新发展述评

系统地论述了当前世界范围内各式远距离反坦克导弹的研究、发展、应用、升级改造思路和更新换代情况,以及一些知名公司的研制和发展特色;指出远射程、高精度、大威力,以及良好的适配能力和多用途化将成为其发展的重点。     

UCAV编队对地攻击智能决策系统总体结构

UCAV编队对地攻击是未来战争制信息权和制空权的关键所在,结合无人作战飞机(UCAV)与有人驾驶飞机各自的特点和优势,提出了UCAV编队对地攻击系统的基本组成和对地攻击流程.根据UCAV编队对地攻击的战术决策类型和决策方式,构造了UCAV编队对地攻击智能决策系统的总体结构并且提出了决策系统应该解决的关键技术,详细分析了所建立的UCAV编队对地攻击决策系统的决策方式和决策流程,并且对该系统所涉及的关键技术进行了详细的研究.     

应用马尔科夫链的空中战役过程数学概念模型

空中战役过程的数学概念模型是对实际作战过程的抽象,是仿真建模的基础.在对空中战役过程物理特性分析基础上,根据典型化、模块化等手段对空中战役的典型作战过程进行处理,使其符合马尔科夫链的判别条件,将整个作战过程看作多个作战阶段组成的状态转移体系,建立用马尔科夫链描述的空中战役典型作战过程数学概念模型,探讨了作战阶段持续时间、状态转移概率的确定和其他影响因素,并对适合作战阶段数学模型的建模方法进行介绍.所得研究结果可以为仿真建模人员的仿真建模工作提供有益的指导.     

一种新型SEU/SET加固鉴频鉴相器设计

分析验证了传统D触发器型PFD结构的SEE敏感性,提出了一种新型的SEU/SET加固鉴频鉴相器,SPICE模拟结果表明该结构功能正确,对于1GHz的时钟信号,鉴频鉴相的精度可达0.8rad.锁相环的整体模拟结果表明,抗辐照的PFD与传统的PFD相比,锁相环的电学性能没有改变,锁定时间保持一致.对传统D触发器型PFD和设计加固的PFD进行了遍历轰击模拟,结果显示,提出的抗辐照PFD加固效果非常明显,敏感节点的数目可以降低80%左右.