特种信息作战飞机通信和协同技术展望

网络化、协同化是未来特种信息作战飞机的重要作战样式。总结了目前空基网络协同方面存在的主要问题,分析了平台通信组网技术的现状和发展趋势,提出了特种信息作战飞机在战场态势感知、评估、攻击和防护阶段一体化协同的要求。在借鉴美军网络化体系建设的基础上,阐明了推进一体化协同的策略及需要解决的关键问题,为该类装备的一体化协同设计提供指导参考。     

Space solar cells—tradeoff analysis

This paper summarizes the study that had the objective to tradeoff space solar cells and solar array designs to determine the best choice of solar cell and array technology that would be more beneficial in terms of mass, area and cost for different types of space missions. Space solar cells, which are commercially now available in the market and to be available in the near future, were considered for this trade study. Four solar array designs: rigid, flexible, thin film flexible and concentrator solar arrays were considered for assessment. Performance of the solar cells along with solar array designs were studied for two types of space missions: geo synchronous orbit (GEO) and low earth orbit (LEO) spacecraft. The Solar array designs assumed were to provide 15 kW power for 15 years mission life in GEO and 5 kW power for 5 years mission life in LEO altitudes. To perform tradeoff analysis a spread sheet model was developed that calculates the size, mass and estimates the cost of solar arrays based on different solar cell and array technologies for given set of mission requirements. Comparative performance metrics (W/kg, W/m², kg/m², and $/W) were calculated for all solar arrays studied and compared, at the solar array subsystem level and also at the spacecraft system level. The trade analysis results show that high-efficiency multijunction solar cells bring lot of cost advantages for both types of missions. The trade study also show that thin film solar cells with moderate efficiency with ultra lightweight flexible array design may become competitive with well-established single crystalline solar cell technologies in the future.     

月球探测辐射环境分析

扼要介绍了月球探测的辐射环境,分析了CE-1在轨探测的辐射环境数据,在此基础上,分析了月球辐射环境对探测器的影响,提出了后续月球探测辐射防护研究建议。     

载人防护缓冲气囊座椅的优化设计

针对设备载人空投过程中乘员防护的问题,设计出一种对乘员人体进行防护的缓冲气囊座椅,并采用MADYMO软件建立了缓冲气囊座椅数值模型,模拟该设备载人空投着陆中缓冲气囊座椅对乘员的缓冲过程。以减少人体的颈部损伤和胸部损伤为优化目标,利用微型多目标遗传算法对缓冲气囊座椅的充气质量、排气孔面积、排气压差以及缓冲气囊护颈的充气质量进行优化。该优化设计不但可以减少气囊座椅设计实验次数从而降低实验的成本,而且在载人空投防护技术领域具有一定的实际工程意义。     

有人/无人机协同空地作战关键技术综述

有人/无人机协同作战是C4KISR体系下一种典型的作战方式,综合有人/无人机协同作战在各国的研究及进展情况,给出了有人/无人机协同作战指挥控制系统的结构,按照空域和时域两个方面分析了有人机、无人机两个平台的组成部分及协同控制功能,归纳出协同作战所需要解决的关键技术,并且给出了一个在典型作战任务想定下的作战情报指令及控制...     

月球混凝土研究进展

月球混凝土是月球基地建设、矿产开采等工程建设的最佳建筑材料,将为我国月球资源开发提供条件.通过评述月球混凝土的起源、当前国际研究现状及进展,并指出了研究中存在的不足以及急需开展的研究方向,将为我国月球混凝土的研制提供参考.     

H20-20程控数字交换机软件结构初步分析

本文对H20-20程控数字交换机的软件结构进行了初步分析,并描述了软件的组成、模块的功能以及模块间连接关系。     

Halo orbit mission correction maneuvers using optimal control

This paper addresses the computation of the required trajectory correction maneuvers for a halo orbit space mission to compensate for the launch velocity errors introduced by inaccuracies of the launch vehicle. By combining dynamical systems theory with optimal control techniques, we are able to provide a compelling portrait of the complex landscape of the trajectory design space. This approach enables automation of the analysis to perform parametric studies that simply were not available to mission designers a few years ago, such as how the magnitude of the errors and the timing of the first trajectory correction maneuver affects the correction ΔV. The impetus for combining dynamical systems theory and optimal control in this problem arises from design issues for the Genesis Discovery Mission being developed for NASA by the Jet Propulsion Laboratory.     

登月飞行器软着陆发动机持续工作初始点选择研究

完成了推力幅值恒定的登月飞行器时间最优和燃料最优的软着陆轨道研究。文中将飞行器在月球表面软着陆的轨道分为开普勒下降轨道和制动发动机持续工作轨道两个阶段进行了综合研究。并着重研究了当飞行器从高度为100km的轨道下降到15km近月点时,在近月点附近是否存在一点,在该点软着陆发动机开始持续工作能够更加节省燃料。