基于反坦克导弹模拟训练的虚拟战场环境设计与实现

虚拟战场环境是军事仿真应用的可视化平台。结合反坦克导弹模拟训练需要,对虚拟战场环境的建立进行了论述,给出了具体的设计方案,实现了一个逼真的射击训练模拟环境。所涉及到的虚拟战场环境已成功应用于反坦克导弹模拟训练当中。     

虚拟战场中坦克的快速碰撞检测算法

为了使虚拟战场中的坦克仿真运动有较高的真实性,必须处理坦克与场景中的物体及地形的碰撞问题。提出了碰撞检测的简化包围盒算法及地形匹配算法,分别解决这两种碰撞问题。在地形匹配算法中,依据地形平均曲率划定地形范围,地形平缓的地带采用两点匹配法,变化较为剧烈的地带采用三点匹配法。这两种简化的处理方法降低了系统的计算要求,满足了系统仿真的真实性需求。     

基于图像的虚拟战场环境

简要总结了IBR技术的发展和现状,比较了各种模型的特点,分析了虚拟战场环境生成应包含的内容,提出了实现该环境需解决的关键技术.采用多同心圆可以构建大范围场景视点模型,分析了一种基于基础矩阵的相机参数标定方法,实现了一种基于面积和特征线的图像整合算法,对战场图像采集存储提出了初步方法.最后提出了系统实现的基本框架,为进一步研究打下了良好的基础.     

导弹阵地静电电磁环境效应初探

从静电的定义及产生方式、危害及形成条件2个方面,简述了静电;结合导弹阵地的实际电磁环境,从提高导弹武器系统的可靠性等3个方面,具体论述了开展导弹阵地静电电磁环境效应研究的意义;研究了导弹阵地静电源的形成机理和作用机理;结合导弹阵地的静电研究结论,从抑制静电累积、采取EMC措施等4个方面对导弹阵地的静电防护作了讨论。     

Static and free vibration analyses of functionally graded porous variable-thickness plates using an edge-based smoothed finite element method

The main purpose of this paper is to present numerical results of static bending and free vibration of functionally graded porous (FGP) variable-thickness plates by using an edge-based smoothed finite element method (ES-FEM) associate with the mixed interpolation of tensorial components technique for the three-node triangular element (MITC3), so-called ES-MITC3. This ES-MITC3 element is performed to eliminate the shear locking problem and to enhance the accuracy of the existing MITC3 element. In the ES-MITC3 element, the stiffness matrices are obtained by using the strain smoothing technique over the smoothing domains formed by two adjacent MITC3 triangular elements sharing an edge. Materials of the plate are FGP with a power-law index (k) and maximum porosity distributions (Ω) in the forms of cosine functions. The influences of some geometric parameters, material properties on static bending, and natural frequency of the FGP variable-thickness plates are examined in detail.     

Influence of porosity distribution on nonlinear free vibration and transient responses of porous functionally graded skew plates

This article deals with the investigation of the effects of porosity distributions on nonlinear free vibration and transient analysis of porous functionally graded skew (PFGS) plates. The effective material properties of the PFGS plates are obtained from the modified power-law equations in which gradation varies through the thickness of the PFGS plate. A nonlinear finite element (FE) formulation for the overall PFGS plate is derived by adopting first-order shear deformation theory (FSDT) in conjunction with von Karman’s nonlinear strain displacement relations. The governing equations of the PFGS plate are derived using the principle of virtual work. The direct iterative method and Newmark’s integration technique are espoused to solve nonlinear mathematical relations. The influences of the porosity distributions and porosity parameter indices on the nonlinear frequency responses of the PFGS plate for different skew angles are studied in various parameters. The effects of volume fraction grading index and skew angle on the plate’s nonlinear dynamic responses for various porosity distributions are illustrated in detail.     

决策支持系统可视化快速集成环境

决策支持系统的快速集成环境的研究一直是决策支持系统研究的核心内容。本文研究了决策支持系统可视化快速集成技术及其实现 ,并重点介绍了作者开发的决策支持系统可视化快速集成环境研究Vi sualDSSBuilder及其在开发过程中所解决的技术难题。     

战场电磁环境可视化研究

对电磁空间的信息争夺是敌我双方争夺"信息优势"的主要战场。战场电磁环境的透明化及其作战研究是一个急需解决的问题。从作战指挥需要出发,提出了战场电磁环境可视化系统的设计原则及应满足的具体要求,列举了实现电磁环境可视化的几个基本要素,最后,对电磁环境可视化的技术实现做了详细介绍。     

面向战术环境的语音指挥技术研究

与数据指挥相比,语音指挥在战术环境中优势明显。但因战术条件下地理环境复杂、电磁环境恶劣、通信信道速率低等原因影响了其指挥效能的发挥。通过对语音指挥现状分析,提出面向战术环境特别是窄信道条件下语音指挥的总体设想,并给出提升战术环境下语音指挥能力的关键技术及解决措施。最后通过试验验证了技术可行性。     

复杂对抗环境下对地攻击武器选择

随着战争形势的发展,武器的选择决策问题需要更加智能化、自动化。基于影响图理论在不确定推理方面的优势,将影响图理论引入武器选择问题,分析了复杂战场环境下,天气、干扰、敌方威胁等因素对攻击机选择对地攻击武器的影响。构建了对地攻击武器选择决策影响图模型,利用该模型,提供了一种武器选择辅助决策方法。通过仿真计算验证了该模型能够使武器选择更加合理、高效。