运载火箭摄动制导导引系数实时计算方法

对于新型运载火箭,没有相近型号导引系数数据供参考,采用传统试探法计算量大,在制导方案初期论证中不能满足多方案快速计算的需求。在引入理想弹道剩余飞行速度概念的基础上,提出导引系数实时计算方法。本方法对当前实时状态参数和后续飞行段弹道进行了综合考虑,通过数字仿真表明导引精度高于传统常系数导引方法。由于本方法对导引能力进行了预估,因而制导指令不会剧烈变化,易于姿态控制系统的设计实现。同时,由于采用完全解析法,对箭载计算机计算能力要求几乎没有增加,易于工程实现。     

基于AHP和DEA综合评判的反恐分队综合作战效能评估

通过分析影响反恐分队综合作战效能的主要因素,建立了反恐分队综合作战效能评估的指标体系.然后,运用模糊AHP评估模型对反恐分队综合作战效能进行定位评估.最后,运用DEA模型对一级指标进行了有效性分析,并指出了无效指标需要提高的幅度.     

微波与红外干衣实验研究

本文从干燥机理出发分析了微波干衣优于红外的性能，并且从实验表明微波干衣比用ＰＴＣ陶瓷板红外干衣平均节能１０～３０％，平均节时２０～４０％。     

自由飘浮空间机器人准刚性分解运动轨迹控制与仿真

研究轨道空间机器人操作时,基座处于自由飘浮状态的手爪准刚性运动直角坐标轨迹的分解运动控制,重点分析了广义雅可比矩阵的计算,并进行了空间单手３—ＤＯＦ的仿真,该方法可相应推广到开链多手。     

钠冷快速中子增殖反应堆钠火研究综述

核电站是利用原子核裂变反应放出能量发电的装置,其核心是核反应堆。介绍了核电研究背景和钠冷快速中子增殖反应堆,指出钠冷快堆核电站的主要消防安全隐患是钠循环工艺的泄漏火灾,对国内外钠火研究现状进行了详细介绍,提出了钠火研究的主要内容及关键技术。     

电磁核辐射对WSNs数据传输性能影响的分析

由于低传输时延和高带宽,射频(Radio Frequency,RF)信号广泛应用于无线传感网络(Wireless Sensor Network,WSN)节点间的通信.然而,外界电磁或核辐射影响了基于RF的WSN通信.电磁或核辐射导致节点通信间歇性中断,将此类节点称为故障节点.故障节点可能能够正常感测环境,但会间歇性失去通信能力,这就形成动态的通信黑洞.为此,分析了故障节点对WSN的影响.推导了故障节点行为的数学模型,理论上分析了故障节点对网络能耗及数据包传递率的影响.仿真数据证实,故障节点的存在降低了网络性能.     

军民融合框架下非战争军事行动应急防疫保障体系建设的思考

2020年初发生的"新冠肺炎"疫情是新中国成立以来防控难度最大的重大突发公共卫生事件,也是对军队应急防疫保障体系的实际检验。军队应立足于军民融合战略思想的大背景,着眼非战争军事行动应急防疫保障体系建设的实际,完善重大疫情防控体制机制,进一步健全公共卫生体系,以全面提升防控和救治能力。本文结合当前新型冠状病毒肺炎疫情和以往非战争军事行动应急防疫保障的实践经验,分析了非战争军事行动卫生防疫保障的特点,阐述了其经验做法和存在的不足,从防疫指挥救治、应急物资保障、卫勤保障法律、心理危机干预以及防疫研发攻关等五个方面给出了对策措施,希翼随着军民融合不断深入推进,军地救治经验的相互交流和科研技术的协助攻关,本研究能够为非战争军事行动应急防疫保障体系建设提供一些参考。     

A reusable planar triggered spark-gap switch batched-fabricated with PCB technology for medium-and low-voltage pulse power systems

Triggered spark-gap switch is a popular discharge switch for pulse power systems. Previous studies have focused on planarizing this switch using thin film techniques in order to meet the requirements of compact size in the systems. Such switches are one-shot due to electrodes being too thin to sufficiently resist spark-erosion. Additionally, these switches did not employ any structures in securing internal gas composition, resulting in inconsistent performance under harsh atmospheres. In this work, a novel planar triggered spark-gap switch (PTS) with a hermetically sealed cavity was batched-prepared with printed circuit board (PCB) technology, to achieve reusability with low cost. The proposed PTS was inspected by micro-computed tomography to ensure PCB techniques meet the requirements of machining precision. The results from electrical experiments demonstrated that PCB PTS were consistent and reusable with lifespan over 20 times. The calculated switch voltage and circuit current were consistent with those derived from real-world measurements. Finally, PCB PTS was used to introduce hexanitrostilbene (HNS) pellets in a pulse power system to verify its performance.     

Thermodynamics and performance of Al/CuO nanothermite with different storage time

The storage stability of energetic materials is important for its application. Here, the storage stability of Al/CuO nanothermite, which was prepared by electrospray method and stored with different storage time, was systematically researched. The activation energy of Al/CuO nanothermite was calculated by differential scanning calorimetry (DSC). The ignition temperature and the curve pressure history of Al/CuO nanothermite was measured using ignition temperature measuring device and constant-volume pressurization tests, respectively. Further, the thermites were characterized by X-ray Diffractometer (XRD), X-ray photoelectron spectroscopy (XPS), scanning electron microscope (SEM) and Transmission electron microscopy (TEM). The results show that the morphology of the thermites did not change significantly. The activation energy was decreased from 254.1 kJ/mol to 181.8 kJ/mol after storage for 13 months. When stored for 0, 7 and 13 months, the peak pressures of Al/CuO nanothermite were 685.8 kPa, 626.3 kPa and 625.5 kPa, respectively. In addition to the ignition temperature, it was 775 ℃, 739 ℃ and 754 ℃, respectively. This result indicated that the ignition and combustion properties of Al/CuO nano-thermite are obviously reduced when stored for a long time, at room temperature.     

A method to determine the shell layout scheme for equipment battlefield damage tests under artillery fire

In this paper,a new method for determining the shell layout scheme is proposed,which can make the equipment damage data by the battlefield damage test resemble as close as possible the actual combat data.This method is based on the analysis of the impact point distribution and effective damage area of equipment.In order to obtain the position of the impact points,an impact point distribution model under artillery fire was established.Similarly,in order to obtain the effective damage area of equipment,the concepts of generalized damage area and task-based equipment functional damage probability were demonstrated,and the corresponding calculation model was established.Through case analysis,the shell layout scheme was effectively obtained,verifying the correctness of the proposed method.