自动化配料系统在总装库房管理中的应用

文章针对自动化配料系统在总装库房中的建设与实施,介绍了自动化配料系统的组成,自动化货柜与看板生产管理相结合的物流管理模式,以及在这种管理模式下的业务流程,并结合面向总装生产的实施进行了经济效益分析。在总装库房管理全面提升的同时,为总装生产全面协调可持续发展提供有力保障。     

全自动配合饲料机组配料速度自适应调节

全自动配合料机组中，配料工序是重点是也难点。配料工序的控制实质上是对配料精度的控制，对原料投料速度控制以及对原料投料顺序的控制。     

物料配比自动控制系统

物料配比生产线控制系统是集光电技术、自动控制技术、变频技术和计算机技术于一体的工业自动化控制闭环系统。该系统主要是根据动态皮带称的原理，通过测量一皮带称的流量来控制另一台皮带称的流量，从而达到自动配料的目的。该系统具有操作简单、显示直观、控制稳定、抗干扰能力强、节能耐用、适用范围广、成本低等特点。     

单片机检测控制模板—高炉上料

可配制成各种小规模的工业控制机。作低档开关量可编程序控制器(PC)的模拟量扩展口智能仪器、仪表控制等。目前应用于高炉上料电子秤,并配有配料电子秤应用软件。技术指标和功能: 基本检测控制模板有以下四种:     

喉衬用石墨材料的性能和功能评价

评价了国内固体火箭发动机喉衬中成功应用的第一代高强石墨、第二代高密高强石墨、第三代各向同性石墨的物理、力学、热学等材料基本性能和抗热冲击、耐烧蚀等应用功能,并与国外相应的石墨材料性能与功能进行了分析对比,为建立喉衬用石墨材料数据库奠定了基础。揭示了石墨材料拉伸强度、热导率、弹性模量及热膨胀系数与抗热冲击功能的关联度。指出适当放大配料方的最大颗粒度,提高石墨化温度和适宜控制石墨材料的密度范围,是提高各向同性石墨材料综合性能的重点改进方向。     

中南空管局完成区管欧洲猫自动化系统V5版本软件升级

2008年1月9日,中南空管局设备监控中心对广州区管中心欧洲猫自动化系统进行了V5．1版本软件升级,升级过程顺利,升级后系统运行平稳。欧洲猫自动化系统V5．1新版本大大提高了系统运行的可靠性,解决了席位屏幕僵死等系统存在的10多个问题。该版本采用新的监控终端大大提高了系统的可监控性,并可兼容linux系统PC工作站,提高了欧洲猫系统的兼容性,并为该系统的进一步扩容升级创造了良好的系统环境。     

反导系统中的模式识别技术及其发展趋势

根据反导系统目标识别特点,提出了反导系统识别特点及其对模式识别技术的要求,然后系统回顾了反导系统的红外与雷达特征提取与识别技术,总结了反导系统中的模式识别方法,将反导系统中的模式识别技术归纳为统计识别方法、专家系统法等五类,最后探讨了反导系统中模式识别技术发展趋势。     

国外潜艇指控系统的发展趋势及启示

简要分析了国外潜艇指控系统的发展历程,总结了美、俄、法等发达国家潜艇指控系统的发展模式,介绍了国外几型典型、先进的潜艇指控系统,综合考虑国外不同发展模式的潜艇指控系统共性特点,归纳了国外潜艇指控系统的技术发展趋势,提出了国内潜艇指控系统的发展建议。     

多基站雷达同步系统

主要介绍雷达组网或多基地被动无源定位情况下各站之间必须要求的高精度同步系统的技术。首先给出了该高精度同步系统的主要功能和技术用途。介绍了现有的几种同步系统 ,然后重点介绍了卫星同步系统和微波同步系统的基本原理 ,最后提出了目前研制的组合同步系统模块 ,并给出了主要技术指标     

双边遥操作系统操作性能度量频域指标

在双边遥操作控制系统的设计中,如何分析和评价遥操作系统的操作性能是一个至关重要的问题。利用频域分析方法,引入了一种新的遥操作系统操作性能度量指标,运用该指标分析了Anderson无源性遥操作系统的操作性能,并针对单边时延条件下的双边控制系统,获得了系统透明性与系统单边时延以及系统跟踪性与系统单边时延之间的关系曲线,解释了Anderson方法为什么只适用于时延不大于1s的系统,并验证了所提度量指标的合理性和有效性。
     

“航天器回收技术”在兵器上的应用

作为“航天器回收技术”在兵器上的应用事例,对一种水雷降落伞系统进行简略的介绍。     

氧化亚氮推进技术研究进展

随着环境保护的加强,人们越来越希望找到一种绿色推进剂来代替现有的肼类有毒推进剂.氧化亚氮作为一种绿色推进剂,无毒性,地面实验操作处理方便,不需要繁琐昂贵的防护;常温贮存性,贮箱几乎不需要主动热控制;饱和压力高,可采用自增压方式供应推进剂;绝热分解温度较高,可作为单组元和双组元发动机的推进剂.分析了氧化亚氮作为推进剂的性能及其主要应用领域,着重研究其在液体火箭发动机的应用.通过对氧化亚氮自增压供应系统,单组元推进的催化分解系统,克服催化床限制的氧化亚氮与燃料混合的NOFBXTM技术,以及氧化亚氮作为氧化剂的双组元推进系统的国内外研究进展进行综述,指出当前研究工作中存在的问题,以期为该方面的进一步研究提供一定的参考.     

煤油/氧气同轴离心喷嘴燃烧数值模拟

为了更好地了解同轴离心喷嘴的工作特性,基于DDES模型研究了油气比分别为0.5、1、1.5下以煤油/氧气为推进剂的喷嘴的流体动力学特性与非预混燃烧特征。研究结果表明:由于旋流离心作用,在喷嘴出口轴心处和燃烧室顶部分别存在一个驻定涡和角涡,驻定涡径向分布在0.9 R~1.4 R,轴向尺寸在-1 R~14 R,随着燃料流量增大,驻定涡会向喷嘴内部推进,并且径向尺寸也会扩大。燃烧计算结果表明,随着燃料流量增大,推进剂的掺混拖曳区变长、掺混效果变好;而由于油气比的增加,燃烧室更加富油因此燃烧温度有所下降,同时火焰前锋向喷嘴内移。     

C/C复合材料等温CVI工艺T-S模糊系统研究

等温CVI是目前制备高性能碳／碳(C／C)复合材料的重要技术,其主要不足之处是周期长,成本高,建立CVI工艺参数与沉积速率或均匀性之间的关系模型,进而来指导工艺的设计与优化,是达到降低C／C复合材料开发成本的重要途径。本文提出基于模糊推理系统理论,建立等温CVI工艺基于实验的T—S模糊系统模型,来挖掘和表达实验中所积累的无法用公式来描述的经验,根据该模型得到了一类盘状制件CVI工艺主要沉积条件的作用机理,为工艺优化、设计和控制提供了理论上的指导。     

Space assets for demining assistance

Populations emerging from armed conflicts often remain threatened by landmines and explosive remnants of war. The international mine action community is concerned with the relief of this threat. The Space Assets for Demining Assistance (SADA) undertaking is a set of activities that aim at developing new services to improve the socio-economic impact of mine action activities, primarily focused on the release of land thought to be contaminated, a process described as land release. SADA was originally initiated by the International Astronautical Federation (IAF). It has been implemented under the Integrated Applications Promotion (IAP) program of the European Space Agency (ESA).Land release in mine action is the process whereby the demining community identifies, surveys and prioritizes suspected hazardous areas for more detailed investigation, which eventually results in the clearance of landmines and other explosives, thereby releasing land to the local population. SADA has a broad scope, covering activities, such as planning (risk and impact analysis, prioritization, and resource management), field operations and reporting.SADA services are developed in two phases: feasibility studies followed by demonstration projects. Three parallel feasibility studies have been performed. They aimed at defining an integrated set of space enabled services to support the land release process in mine action, and at analyzing their added value, viability and sustainability. The needs of the mine action sector have been assessed and the potential contribution of space assets has been identified. Support services have been formulated. To test their fieldability, proofs of concept involving mine action end users in various operational field settings have been performed by each of the study teams. The economic viability has also been assessed.Whenever relevant and cost-effective, SADA aims at integrating Earth observation data, GNSS navigation and SatCom technologies with existing mine action tools and procedures, as well as with novel aerial survey technologies. Such conformity with existing user processes, as well as available budgets and appropriateness of technology based solutions given the field level operational setting are important conditions for success. The studies have demonstrated that Earth observation data, satellite navigation solutions and in some cases, satellite communication, indeed can provide added value to mine action activities if properly tailored based on close user interaction and provided through a suitable channel. Such added value for example includes easy and sustained access to Earth observation data for general purpose mapping, land use assessment for post-release progress reporting, and multi-source data fusion algorithms to help quantify risks and socio-economic impact for prioritization and planning purposes. The environment and boundaries of a hazardous area can also be better specified to support the land release process including detailed survey and clearance operations. Satellite communication can help to provide relevant data to remote locations, but is not regarded as strongly user driven. Finally, satellite navigation can support more precise non-technical surveys, as well as aerial observation with small planes or hand-launched UAV's.To ensure the activity is genuinely user driven, the Geneva International Center for Humanitarian Demining (GICHD) plays an important role as ESA’s external advisor. ESA is furthermore supported by a representative field operator, the Swiss Foundation of Mine Action (FSD), providing ESA with a direct connection to the field level end users. Specifically FSD has provided a shared user needs baseline to the three study teams. To ensure solutions meet with end user requirements, the study teams themselves include mine action representatives and have interacted closely with their pre-existing and newly established contacts within the mine action community.     

CBERS-1卫星CCD相机零级图像处理研究

CCD相机是CBERS - 1卫星上的主要有效载荷之一。利用其接收的可见光和近红外谱段的图像 ,可以在国民经济的各个生产部门 ,诸如国土资源调查、农业、林业、地矿、水利、环境、生态等方面得到广泛应用。但是由于探元和光学系统成像的物理机制和各种干扰等因素影响 ,地面接收到的数据必须经过处理才能应用。文章介绍的内容就是将这种图像数据经图像预处理 ,得到零级图像 ;经过相应的辐射校正 ,得到一级图像 ;经过几何校正 ,得到二级图像产品 ,提供给其它部门加以应用     

中心进气旋转射流冲压燃烧室湍流流动数值模拟

采用Reynolds应力方程模型及涡耗散燃烧模型,对头部进气式固体火箭冲压发动机二次燃烧二维轴对称反应流场进行了数值模拟,研究了空气射流和燃气射流无旋、同向旋转和反向旋转3种进气方式对二次燃烧的影响。研究结果表明,当空气射流和燃气射流以有旋状态进入补燃室时,燃料与空气的混合速度变快,化学反应更快,燃烧也更为充分。     

Conceptual design of a hypervelocity asteroid intercept vehicle (HAIV) and its flight validation mission

An intercept mission with nuclear explosives is the most effective of the practical mitigation options against the impact threat of near-Earth objects (NEOs) with a short warning time (e.g., much less than 10 years). The existing penetrated subsurface nuclear explosion technology limits the intercept velocity to less than approximately 300 m/s. Consequently, an innovative concept of blending a hypervelocity kinetic impactor with a subsurface nuclear explosion has been developed for optimal penetration, fragmentation, and dispersion of the target NEO. A proposed hypervelocity asteroid intercept vehicle (HAIV) consists of a kinetic-impact leader spacecraft and a follower spacecraft carrying nuclear explosives. This paper describes the conceptual development and design of a baseline HAIV system and its flight validation mission architecture for three mission cost classifications (e.g., $500 M, $1 B, and $1.5 B).     

Space WARC: The stake of developing countries

This article provides an overview of the basic issues on the eve of the WARC-ORB 85 Conference. Professor Rutkowski argues that developing countries have more at stake in achieving a flexible, yet equitable, result than do the industrialized countries. The answers lie in skilfully blending all the processes used by the ITU over the years to assure that all the interests of developing countries are met, and to allow full participation of these countries in the current telecommunications revolution.     

运载火箭遥测数据智能判读算法应用

在运载火箭高发射密度、高判读需求、高数据量的背景下，现有自动化判读的判据覆盖率不全、判据编写门槛高、耗时多的问题日益凸显，缺少较通用的算法对传统判读算法未覆盖的判读任务进行判读补充，进而影响运载火箭效果评估与系统性能评定。为充分挖掘海量遥测数据中隐含的参数变化规律，设计智能判读算法作为传统算法的有益补充，提升传统判读的判读覆盖率和判读效率。以液体运载火箭长期加电试验产生的遥测数据为研究对象，设计集成神经网络智能判读算法，在给出的判读指标下研究得出，集成神经网络在频率异常、丢帧等五种现有判据难以描述的判读场景下，判读性能提升30%，提高了现有判据的覆盖率，后续可为判读体系完善和智能判读落地提供研究参考。