法国"海响尾蛇"导弹对付机动目标的能力估计

讨论“海响尾蛇”导弹在临近遭遇点时采用相对比例导航制导律对付机动目标的能力问题     

外槽轮机构分度精度分析与设计

分析了外槽轮机构主要零部件的设计精度对槽轮分度精度的影响 ,结果表明主动件长度和滚子与轮槽之间的间隙对分度精度影响最大。用概率与数理统计的方法导出了精度设计公式并给出一个计算实例     

变倍凸轮的计算机优化设计

以连续变倍瞄准镜为例 ,推导了变倍凸轮转角与变倍曲线升角的关系式 ,建立了变倍凸轮曲线优化设计的数学模型 ,并叙述了有关的设计方法。     

分布式作战仿真接口概念设计

接口设计是实现分布式作战仿真互操作的关键。本文在对高层体系结构研究的基础上 ,提出了一种基于状态空间影子模型的接口概念设计方案 ,分析和论述了相关系统结构、接口数据的表达、接口的构成及其工作原理。     

自由变形技术在RAE2822翼型优化设计中的应用

采用自由变形技术实现对RAE2822跨声速翼型表面的参数化,采用试验设计方法对设计参数进行计算流体力学数值模拟样本训练,最后采用Kriging代理模型和MIGA、NLPQL优化算法进行优化分析,将得到的优化变量进一步进行计算流体力学分析获得最后的优化结果。计算结果显示,自由变形参数化方法简单易行,可实现直接对网格的变形;优化的结果相比于原始翼型,升阻比增加了57. 2%,从而证明了本文方法的可行性和有效性。     

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.     

旋转自稳定末敏子弹运动特性分析

为研究某型旋转自稳定末敏子弹运动特性,充分考虑末敏子弹的结构强非对称特点和其初始抛撒条件,引入动不平衡弹体模型,推导超大攻角条件下子弹的空间6自由度弹道方程,计算分析子弹的稳态扫描运动特性。结果表明:子弹体的质量分布非对称和初始抛撒角速度是子弹药实现稳态扫描运动的必要条件;子弹扫描频率只由抛撒角速度ω_(σ0)决定,且和ω_(σ0)正相关;初始俯仰角φ_(a0)≥0°时,扫描角整体呈增大趋势,初始俯仰角φ_(a0)0°时,扫描角整体变化趋势为先减小后增大;扫描面积与配重-全弹质量比、初始俯仰角、初始偏航角和初始角速度呈正相关,与均质圆柱体转动惯量比呈负相关。     

环境参数在线辨识及其在滑翔段制导中的应用

针对助推滑翔导弹,提出基于飞行环境参数在线辨识的滑翔段数值预测校正制导方法。综合考虑大气密度和气动系数对导弹运动的影响,引入滑翔段综合环境参数,利用扩展Kalman滤波方法对综合参数进行在线辨识。基于在线辨识结果,利用渐消记忆递推最小二乘方法在线建立环境参数预测模型,并利用最新辨识结果进行模型的在线修正。设计了纵向和横向制导律,并基于环境参数在线预测模型进行落点预测,以克服飞行环境扰动对落点预测精度的影响。进行了大气密度非定常扰动下的制导仿真,以及密度和气动参数随机扰动下的Monte Carlo仿真。仿真结果表明:环境参数在线预测模型能准确预报飞行环境参数,制导方法对飞行环境扰动具有较强的鲁棒性。     

定向越野路线设计原则与实践

近年来,定向越野因其强参与性、强挑战性在国内发展迅速,相比之下高水平的制图员和运动员的成长却十分缓慢。想要国内定向人才尽快成长,每一次的训练、每一次比赛的路线设计就显得十分重要。好的路线设计充分展现定向运动的特征,让所有参与人员受益匪浅。鉴于国内对路线设计理论的研究还不充分、不系统,本文就路线设计的原则与技巧进行了系统的探讨,旨在丰富路线设计的理论知识体系。     

The Serbian defence institution: the need for clear policy guidance to improve the Serbian defence planning,management, and command processes

ABSTRACT

The uncritical layering of western liberal defence governance norms and concepts on top of existing legacy concepts has impeded achieving coherent military capabilities and capacities when Serbia’s political and military leadership tried to reform the defence system using Western benchmarking principles and Western countries’ best practices. The process of this change has been more valuable than its actual output, as defined by increased capabilities. Such outcomes should be reflective of policy guidance, and can be thought of as closing the trinity loop of a defence planning system: plans, money and execution. This article addresses two key functional areas of the Serbian defence institution. First, it assesses the current state of defence planning to discern its strengths and weaknesses to ascertain if plans are tied to financial decision-making. Second, a full examination of current Serbian defence management is conducted to discern whether weaknesses exist that distract from producing operational capabilities. Both areas are analyzed thoroughly and some solutions for change are proposed. Also, the article analyzes the appearance of two negative phenomena in the planning process – economization and managerialism.