安排过渡过程在坦克炮控系统中的应用研究

分析论述了坦克炮控系统的基本结构以及数学模型,提出、设计了坦克炮控系统安排过渡过程的控制方法,并进行了数值仿真。结果表明,该控制方法能较好解决快速性和超调量的矛盾问题。并使得被控对象的参数可调范围变大,控制器的鲁棒性增强。     

基于超动态测试系统的压力传感器标定技术研究

针对油气爆炸发展过程中压力测量的需要,提出了一种压力传感器标定的新方法。该方法基于超动态测试系统,操作简单,精度可靠,并采用最小二乘法对各测试点进行了拟合,得到了压力传感器的标定系数和其它基本性能指标,保证了测试过程中压力的准确性和精度。可在其它类似的测试系统中应用。     

突防过程的组网雷达干扰资源优化分配

以组网雷达融合中心检测概率为目标函数,建立针对组网雷达系统的干扰资源优化分配模型.并进一步指出该模型运用于飞行器突防时,其不足之处在于"以点带面",以飞行器突防过程中某一点的融合中心检测概率代替整个突防过程时,该评估方法损失过程中的大量信息.在此基础上充分利用突防过程的信息,提出以"融合中心检测概率加权积分"为目标函数,建立基于突防过程的干扰资源优化分配模型.仿真结果表明具有一定的指导意义.     

基于复杂系统的组网雷达系统分析

分析了常规单基雷达演化成组网雷达的过程,并运用复杂系统的基本属性———差异性、多样性、相关性和整体性,分析了组网雷达演化的机理。然后指出组网雷达整体涌现具体表现为作战能力的提高和“四抗”能力的飞跃。最后分析了组网雷达作为复杂系统,网内雷达站之间的数据融合是其涌现的动力学机制。     

装甲兵武器装备信息化建设质量评估体系研究

对武器装备信息化建设情况进行客观的评估分析,是武器装备信息化建设过程中不可缺少的重要环节。为此,首先明确了武器装备信息化建设质量的评判标准,进而构建了反映装甲兵武器装备信息化建设质量的评估体系,为装甲兵武器装备信息化建设的全过程实施有效的管理和控制提供了依据.     

Parallel Sets的改进及其在全球恐怖袭击数据分析中的应用

随着恐怖主义愈演愈烈,"反恐"成为当今世界各国军事安全部门的中心任务.使用分类型可视化工具Parallel Sets分析国际恐怖主义数据库中多属性分类值间的关系,揭示数据库中的隐性信息,并针对Parallel Sets任意排列分类值产生较多交叉的不足,提出带降势的启发式分类值布局算法,自动优化分类值布局顺序,减轻视图中...     

一种基于粒子群优化算法的异构传感器分配方法

针对复杂的战场环境下目标环境机动性增强、传感器资源相对不足且单一传感器获取空间目标信息不完备问题,结合传感器节点自身的性能特征,考虑传感器的抗干扰性能等因素,提出一种传感器信息感知能力评估指标体系,并构建了传感器感知能力定量评价模型,计算出传感器指数.再利用传感器指数,考虑了覆盖率、电磁环境变化、态势变化等因素作为目标函数,研究基于粒子群算法的传感器分配方法,以实现传感器位置的最优分配及感知能力最大化的需求.仿真结果表明,将粒子群优化算法用于该研究,提高了传感器的总体感知能力和资源有效利用率.     

基于改进二进制蝙蝠算法的装备资源保障规划

针对联合作战环境下的装备资源精确保障协同规划问题,考虑以所有保障任务完成时间最短为目标,以保障任务的执行时序和资源需求、保障编组占用冲突,以及资源平台能力更新机制等复杂条件为约束,构建数学模型,提出了基于动态列表调度(Dynamic List Scheduling,DLS)和自适应进化变异二进制蝙蝠算法(Adaptive Mutation Binary Bat Algorithm,AMBBA)的混合装备资源协同保障规划方法.通过动态列表调度选择当前执行保障的任务,在二进制蝙蝠算法寻优中引入自适应学习因子以平衡全局搜索和局部搜索能力,通过在当前可用资源集中搜索最优解为选定任务分配资源,以复杂地域联合作战为例仿真并验证规划效果,结果显示,所提方法可对大规模装备资源协同分配保障问题进行精确高效求解.     

Fabrication and analysis of TIG welding-brazing butt joints of in-situ TiB2/7050 composite and TA2

Lightweight hybrid structures of Al MMCs and titanium alloy dissimilar materials have great prospect in the defence industry application. So, it is necessary to join Al MMCs with Ti metal to achieve this structural design. In this work, in-situ TiB2/7050 composite and TA2 were firstly attempted to join by TIG welding-brazing technique. The result was that the intact welding-brazing butt joint was successfully fabricated. The joint presents dual characteristics, being a brazing on TA2 side and a welding on TiB2/7050 side. At brazing joint side, ER4043 filler metal effectively wets on TA2 under TIG heating condition, and a continuous interfacial reaction layer with 1—3μm is formed at welded metal/TA2 interface. The whole interfacial reaction layers are composed of Ti(AlSi)3 intermetallic compounds (IMCs), but their morphologies at the different regions present obvious distinguishes. The microhardness of the reaction layers is as much as 141—190 HV. At welding joints side, the fusion zone appears the equixaed crystal structure, and the grain sizes are much smaller than those of welded metal, which is attributed to the effect of TiB2 particulates from the melted TiB2/7050 on acceleration formation and inhibiting growth for the new crystal nucleus. The tensile test results show that average tensile strength of the optimal welding-brazing joint is able to achieve 138 MPa. The failure of the tensile joint occurs by quasi-cleavage pattern, and the cracks initiate from the IMCs layer at the groove surface of TA2 and propagate into the welded metal.     

Formation and characterization of core-shell CL-20/TNT composite prepared by spray-drying technique

The core-shell 2,4,6,8,10,12-Hexanitro-2,4,6,8,10,12-hexaazaisowurtzitane/2,4,6-Trinitrotoluene (CL-20/TNT) composite was prepared by spray-drying method in which sensitive high energy explosive (CL-20) was coated with insensitive explosive (TNT). The structure and properties of different formulations of CL-20/TNT composite and CL-20/TNT mixture were characterized by scanning electron microscopy (SEM), Transmission electron microscopy (TEM), Laser particle size analyzer, X-ray photoelectron spectroscopy (XPS), X-ray diffraction (XRD), differential scanning calorimetry (DSC), impact sensitivity test and detonation performance. The results of SEM, TEM, XPS and XRD show that ϵ-CL-20 particles are coated by TNT. When the ratio of CL-20/TNT is 75/25, core-shell structure is well formed, and thickness of the shell is about 20–30 nm. And the analysis of heat and impact show that with the increase of TNT content, the TNT coating on the core-shell composite material can not only catalyze the thermal decomposition of core material (CL-20), but also greatly reduce the impact sensitivity. Compared with the CL-20/TNT mixture (75/25) at the same ratio, the characteristic drop height of core-shell CL-20/TNT composite (75/25) increased by 47.6% and the TNT coating can accelerate the nuclear decomposition in the CL-20/TNT composites. Therefore, the preparation of the core-shell composites can be regarded as a unique means, by which the composites are characterized by controllable decomposition rate, high energy and excellent mechanical sensitivity and could be applied to propellants and other fields.