Nonlinear effects of injection of very low frequency waves into the magnetosphere

This paper presents some results of the experiment with a Soviet-made VLF transmitter influencing the sub-auroral magnetosphere. Stimulation of geomagnetic pulsations in the 0.008–1.0 Hz range with large retardation and a maximum amplitude near and below the modulation frequency was observed.     

热电池DEB粉中硅含量的测定方法

应用Ｎ２Ｏ－Ｃ２ＨＨ２原子吸收法来测定某型导弹热电池正极粉（ＤＥＢ）中的硅含量。结果表明：此法具有操作简便、易掌握、分析周期短等特点。该方法的精度与准确度均能满足热电池研制工作的要求。     

卫星大动量矩飞轮的设计

为满足长寿命大型卫星控制系统的需要 ,设计和研制了一种长寿命、大动量矩的动量飞轮。在介绍了国外大动量矩的动量飞轮产品的基础上 ,论述了 5 5N·m·s飞轮的设计技术和关键技术。给出了样机的测试结果并与国外同类产品的性能进行了比较。结果表明 ,样机的设计原理正确。     

多传感器目标跟踪的实时剔野方法

考虑了目标跟踪和航天测控中测量数据的实时剔野问题，测量数据集合中严重偏离大部分数据所呈现趋势的小部分数据点被称为野值点，野值的剔除对提高目标跟踪精度有十分重要的意义，己有的剔野方法从工程应用角度看，存在不适宜成串出现的野值。需要人工干顾、计算量大，不适宜在线快速处理等缺点，多传感器目标跟踪系统可以通过合理利用传感器的互补与冗余信息来能提高系统的目标跟踪性能，本文在多传感器目标跟踪条件下，综合利用多传感器数据形成的对目标状态参数的正确描述和测量数据集合主体的变化趋势，给出了实时、准确、高效地识别测量数据中野值点的方法。仿真结果表明利用多传感器目标跟踪中航迹融合的分布式融合方法，可以快速、有效地解决野值斑点剔除问题。     

防老剂对HTPB-IPDI高燃速推进剂性能影响研究(Ⅱ)

采用高温加速老化方法，研究了胺类防老剂Ｈ（Ｎ．Ｎ’－二苯基对苯二胺）和酚类防老剂甲叉４４２６－Ｓ（硫代双－３，５－二叔丁基－４－羟苄基）对ＨＴＰＢ／ＩＰＤＩ高燃速推进剂贮存性的影响。实验结果表明，随着贮存时间的延长，推进剂的常温抗拉强度升高，常温、高温、低温下的伸长率降低，加入甲叉４４２６－Ｓ的ＨＴＰＢ／ＩＰＤＩ推进剂的高温贮存性能优于防老剂Ｈ。     

Input Parameters for Models of Energetic Electrons Fluxes at the Geostationary Orbit

The results of cross-correlation analysis between electrons fluxes (with energies of > 0.6MeV, > 2.0 MeV and > 4.0MeV), geomagnetic indices and solar wind parameters are shown in the paper. It is determined that the electron fluxes are controlled not only by the geomagnetic indices, but also by the solar wind parameters, and the solar wind velocity demonstrates the best relation with the electron fluxes. Numerical value of the relation efficiency of external parameters with the highly energetic electrons fluxes shows a periodicity. It is presented here the preliminary results of daily averaged electrons fluxes forecast for a day ahead on the basis of the model of neuron networks.     

无人机CBT教学系统研究

在美国CBT已经成为航空训练的重要教学工具,本文分析了无人机CBT教学系统的总体需求,明确了CBT的基本结构,并利用QFD对工程措施进行分析,从而较全面的对其总体技术进行了研究。     

Numerical investigation on gas–particle flows in horizontal channel under the reduced gravity environments

A unified second-order-moment gas–particle two-phase turbulent model incorporated with kinetic theory of granular flows (USM-θ) is developed to study the particle dispersion behavior of dense gas–particle flows in horizontal channel with 6.96 μm wall roughness and with earth, lunar and microgravity environments, respectively. Anisotropy of gas and particle two-phase stresses and the interaction between two-phase stresses are fully considered by constructing two-phase Reynolds stress model and the transport equation of two-phase stress correlation. The flow behavior of particles in a horizontal channel of Kussin and Sommerfeld [12] experiments is numerically simulated. Results show that the reduced gravity conditions affect the particle concentration distribution, particle velocity and fluctuation velocity, particle temperature, axial–axial fluctuation velocity correlation of gas and particle and particle collision frequency. Under microgravity conditions, particle temperature and collision frequency are much less than those of earth and lunar gravity. Compared with earth gravity, anisotropic of two-phase flow and sedimentation are weaker.     

基于HLA的小卫星半物理仿真系统设计

地面仿真验证是小卫星研制过程的重要组成部分,仿真验证充分与否直接决定了小卫星的研制成功率和在轨运行的可靠性。就小卫星技术特点,结合某型号的地面仿真需求,建立基于HLA的小卫星半物理仿真系统,给出系统的组成结构、联邦间交互数据表、硬件接口单元和联邦成员设计流程等。利用设计与实现的半物理仿真系统,进行了某型号小卫星的仿真验证,结果表明,设计的基于HLA的小卫星半物理仿真系统能够较好地完成动力学与控制分系统、电源分系统和有效载荷分系统的仿真,能够较好地实现控制分系统物理设备的接入,具有较好的实际应用价值。     

能量效率准则在导弹拦截系统评估中的应用

将能量效率物理准则引入对导弹系统的评估.系统的效率取决于总的能量资源和对能量流的控制,通过对导弹武器系统形态的描述,给出了能量效率准则在导弹拦截系统中的应用,对于导弹武器系统作战效能评估及实际应用具有参考价值.