装甲装备器材库存超(欠)储状态分析与程度评价

定义了装甲装备器材库存超(欠)储的概念,提出了维修保障资源点器材储存状态的定性判别和量化方法;考虑数量、时间、空间等影响因素,提出了资源点维修器材超(欠)储程度的评价指标和评价方法,并结合某军区实际数据进行了验证。结果表明:资源点的平均超(欠)储程度反映了保障体系内所有资源点库存偏离正常水平的平均程度,可为确定调剂资源点的优先次序和供应数量提供依据。     

隔离型DC/DC变换器的嵌入式滤波设计

传统的隔离型DC/DC变换器输入端电流断续,会对电源或负载产生严重的电磁干扰,利用嵌入式滤波(Built-in Input Filter,BIF)的方法可以实现输入电流的连续。以嵌入式滤波全桥为例对嵌入式滤波的原理进行了分析,提出了隔离型DC/DC变换器嵌入式滤波拓扑、变压器以及交叉耦合电容参数的设计方法,并用该方法推导和设计了带有嵌入式滤波功能的半桥拓扑,利用PSIM软件进行了仿真分析。搭建了新型半桥拓扑的试验样机,验证了设计方法的有效性。     

The German wars of liberation 1807–1815: The restrained insurgency

In the Age of Napoleon, ‘small wars’ and ‘revolutionary war’ were closely connected. There were, however, different strands of this phenomenon: speaking professionally, conservative officers condemned small wars as an irregular regression to previous less disciplined forms of warfare. The Prussian state continually tried to discipline and regulate spontaneous risings. Yet the irregular character of small wars offered the opportunities for a less complex way of fighting, thus enabling the arming of the ‘people’ to fight. Individual undertakings, such as Ferdinand von Schill's doomed campaign in 1809, were designed to spark off a general popular uprising. But they were cheered by many and supported by few. Meanwhile, Neidhardt von Gneisenau conceived guerrilla-style Landsturm home-defence forces, which were designed for an irregular people's war. These concepts were put into practice in the ‘war of freedom’ – or ‘war of liberation’ – in 1813. Eventually both the mobilisation and the tactics remained regular, however, despite the emphatic appeal to a national ‘people's war’.     

雷达天线扫描方式的自动识别方法

为了对雷达天线扫描方式进行自动识别,改进开发了天线扫描方式模拟器,并分别研究了电子扫描和机械扫描的特征提取和识别方法。基于最大主瓣脉冲序列的特征参数实现电子扫描和机械扫描的区分,然后基于单个天线扫描周期脉冲序列的特征参数实现8种机械扫描方式的自动识别。仿真结果表明,本文方法能够区分一维电扫、二维电扫和机械扫描,并且采用支持向量机决策树对机械扫描方式的识别正确率高于决策树方法。     

MEMS磁力线聚集和垂动调制磁场传感器

针对巨磁阻和磁隧道结等磁阻元件的1/f噪声,提出一种采用微机电系统的磁力线聚集和垂动调制磁场传感器。通过将被测磁场从低频转移到几kHz,实现对磁场的DC/AC转化,从而减小了磁阻元件的1/f噪声。基于该方案采用多层膜巨磁阻元件AA002制作了磁场传感器样品,并进行了实验测试,结果表明:磁传感器样品的调制效率达到了19.3%,超过了已有的其他各种调制方案,同时低频磁场的探测能力达到槡120pT/Hz,相比巨磁阻元件AA002提高了40多倍。     

破片对反辐射导弹战斗部毁伤效能仿真

分析了“哈姆”反辐射导弹目标特性及破片对其毁伤模式,建立了破片对反辐射导弹战斗部毁伤效能模型,研究了不同质量破片对反辐射导弹战斗部的穿透能力和引爆能力。仿真及试验结果表明：单枚破片质量为15g,速度在1700m/s以上,就足以对反辐射导弹战斗部达到解体性毁伤,它为未来反导弹药战斗部设计提供了重要参考。     

携带不同毁伤元的舰炮弹丸对反舰导弹的毁伤仿真分析

舰炮反导技术是当前各国海军研究的热点,其中舰炮弹药的毁伤能力是反导效果评估的重点之一。以携带不同毁伤元的舰炮弹丸在近炸模式下对反舰导弹的毁伤为研究方向,阐述了反舰导弹物理等效模型的建立方法及原则,分别针对两种不同的毁伤元（破片及离散杆）对导弹战斗部舱的毁伤进行了有限元仿真及毁伤效果分析。本研究对于进一步对反舰导弹的毁伤效果分析以及提高舰炮弹丸的毁伤能力提供了理论参考。     

基于视景模拟的无人机导弹发射仿真

无人机单侧导弹发射后,无人机重量特性、重心位置、气动特性发生变化并同时产生附加的干扰力矩,无人机需要在控制系统作用下尽快恢复稳态飞行。通过在Matlab/Simulink中建立无人机六自由度非线性力学模型、控制系统模型、发动机模型、重力模型、标准大气模型、flight gear软件接口等,模拟仿真无人机单侧导弹发射过程,同时将仿真结果进行可视化视景输出,确保无人机系统平台在导弹发射过程中无人机能够很快恢复稳定姿态并按照预定轨迹飞行。视景模拟仿真结果表明：该无人机平台能够顺利完成导弹的安全发射。     

基于矢量运算的舰空弹对抗反舰弹脱靶量分析

脱靶量是舰空导弹重要的作战性能指标,针对某型导弹,从攻防对抗的机理出发,采用矢量运算概念描述舰空导弹对抗反舰导弹的脱靶量。结合矢量运算法则,建立舰空导弹拦截矢量模型、反舰导弹机动矢量模型,同时考虑了导引头噪声和舵系统的过载限制,提出了一种制导盲区脱靶量的解算方法。然后针对不同运动特性的目标、不同干扰强度进行仿真计算。仿真结果表明,目标运动特性和导引头干扰误差等因素对脱靶量大小影响显著,为评价舰空导弹作战效能和有针对性的采取拦截措施提供了技术参考。     

Indirect robust control of agile missile via Theta-D technique

An agile missile with tail fins and pulse thrusters has continuous and discontinuous control inputs. This brings certain difficulty to the autopilot design and stability analysis. Indirect robust control via Theta-D technique is employed to handle this problem. An acceleration tracking system is formulated based on the nonlinear dynamics of agile missile. Considering the dynamics of actuators, there is an error between actual input and computed input. A robust control problem is formed by treating the error as input uncertainty. The robust control is equivalent to a nonlinear quadratic optimal control of the nominal system with a modified performance index including uncertainty bound. Theta-D technique is applied to solve the nonlinear optimal control problem to obtain the final control law. Numerical results show the effectiveness and robustness of the proposed strategy.