基于ExtendSim小件空投地面准备的仿真研究

小件空投是空降兵空投保障的重要组成部分,现已基本形成了包装——运输——装机三阶段的小件空投地面准备保障模式。简要介绍了空投小件包装、运输和装机环节,利用Extend Sim仿真软件,对影响小件空投地面准备的主要因素进行仿真。通过对仿真结果的分析,有利于在空投小件装机数量不间断的情况下,提高小件包装人员和运输车辆的利用率,辅助空投技术人员对影响空投实施的主要因素进行科学决策和统筹管理。     

地/海杂波背景下机载火控雷达效能评估

战斗机在对地/海攻击时,地/海杂波对机载火控雷达的工作效能会产生较大影响。分别针对无干扰和压制干扰条件下两类典型体制的机载火控雷达,给出地/海杂波功率的确定方法,建立了地/海杂波背景下机载火控雷达效能评估模型。通过仿真,分析了无干扰与压制干扰条件下地/海杂波对机载火控雷达工作效能的影响,为机载火控雷达技术的研究提供了一定参考。     

地面无人作战平台性能评价指标体系

论述了地面无人作战平台性能评价研究现状,基于地面无人作战平台的内涵,提出机动性、自主性和任务载荷性能是评价其综合性能的基础,分析了机动性与自主性的支撑性能指标,建立了一种层次化的性能评价指标体系,并对各指标的内涵与度量进行了探讨。     

基于正交实验设计的UAV编队配系优化方法

针对多无人机执行对地攻击作战任务的背景,建立了编队对地攻击模型,提出了基于正交实验设计的编队配系优化方法。在考虑多机协同作战因素下,构建了编队目标分配的基本模型;以探测、识别和杀伤为基本过程,构建了攻击过程模型;以空袭方付出代价、防空方毁伤程度和作战效率为依据,构建了目标函数模型,分析了模型中中间变量与目标函数之间的关系;利用正交实验设计原理,研究了编队配系优劣的评价方法。实例分析表明,该方法能够在已有的资源约束条件下,给出编队的最优配系方案。     

故障传播有向图在地面电源故障诊断的应用

基于图论的故障诊断方法能够有效地缩小故障源的搜索范围,在最短的时间内找到真正产生故障的部件。采用故障传播有向图的方法对某飞行器地面电源故障诊断算法进行了研究,针对该飞行器地面电源的物理结构及相关的电气特性得到其故障传播有向图,并经过一些运算后将有向图进行了分层重构,最后利用故障定位算法模拟了故障定位的过程,得到了很好的效果。     

求同存异:基于标准化视域的高等教育质量标准体系——内在逻辑与建设路径

基于标准化视域的高等教育质量标准体系是参教议教、规范监督、服务社会、利益表达,是为社会发声,是高等教育质量标准体系在表达社会要求。基于标准化视域的高等教育质量标准体系本质是求同存异,即对高等教育质量有基本的标准,也要允许不同类型的高等教育差异化发展。基于标准化视域的高等教育质量标准体系通过建构时间维、逻辑维、条件维、级别维、性质维、对象维的六维一体的建设路径,打造条件维、对象维的规范机制和自我、制度、政府、社会四位一体的保障机制,来推动高等教育质量标准体系的有效运作。     

The mechanism of liquid dispersing from a cylinder driven by central dynamic shock loading

A systematic investigation on the mechanism of dynamic liquid dispersing process via theoretical and experimental approach is presented. The experiments include weak and strong constrained scenarios using the high-speed camera technique and the flash X-ray radiography technique. Based on dynamic analysis, one-dimensional characteristics analysis and some numerical simulations on the propagating processes of blast waves before the container shell rupturing, further and detailed analyses of the experimental results are presented. The effects of the liquid viscosity on the dynamic dispersing flow are also analyzed, and the spall fracture mechanism is explored. Thus, the dominating forces determining the dispersing liquid flow are revealed, that is, the stretching and shearing action due to the interaction of two reflecting rarefaction waves in opposite propagating directions. The influence of container shell strength on the dispersing liquid flow is also investigated, and the characters of cavitation layered in liquid before shell rupturing are uncovered. Results revealed that different shell material results in different cavitating layers. Then the different cavitating layers drive the different dynamic liquid dispersing process coming into being. The metastable liquid states caused by pressure drop and cavi-tation generation are discussed.     

基于车载GPS定位的固定目标坐标测量误差分析

通过分析地面移动侦察系统对固定目标进行一次坐标测量时的测量过程,建立了固定目标坐标测量模型。通过对测量过程中误差传递规律的分析,导出了目标坐标测量误差的分布规律。根据坐标测量误差中各组成成分的大小,将测量误差分布规律近似成正态分布,并给出了分布参数的简化计算方法。仿真结果证实了误差分布规律近似及参数计算简化的可行性。     

雷电浪涌对直流电源冲击效应的实验研究

直流电源是雷电进入电子系统的主要途径。为了研究雷电浪涌对直流电源的冲击效应 ,进行了雷电浪涌对直流电源的注入实验 ,发现雷电浪涌对直流电源有很大的干扰和破坏作用 ,并在实验基础上 ,提出了有效的防护措施     

Efficient budget allocation strategies for elementary effects method in stochastic simulation

This paper focuses on extending the Morris' elementary effects method (MM) for sensitivity analysis/factor screening originated in the context of deterministic computer experiments to the stochastic simulation setting. Given a fixed simulation budget to expend, the main objective is to provide efficient and accurate estimates of main and interaction (or nonlinear) effects coined by the standard MM for characterizing the importance of each factor, despite the impact of simulation errors. Taking into account both the factor/input sampling uncertainty rooted in MM and the random errors inherent in a stochastic simulation, we develop efficient budget allocation strategies for implementing MM in this new context. Under each strategy proposed, we derive its corresponding optimal budget partition and optimal budget allocation rules. Numerical results corroborate the practical effectiveness of the proposed budget allocation strategies.