欢迎来到麦多课文档分享! | 帮助中心 海量文档,免费浏览,给你所需,享你所想!
麦多课文档分享
全部分类
  • 标准规范>
  • 教学课件>
  • 考试资料>
  • 办公文档>
  • 学术论文>
  • 行业资料>
  • 易语言源码>
  • ImageVerifierCode 换一换
    首页 麦多课文档分享 > 资源分类 > PDF文档下载
    分享到微信 分享到微博 分享到QQ空间

    REG NASA-LLIS-1177--2001 Lessons Learned - International Space Station (ISS) Computer Hardware-Software Multiplexer-Demultiplexer (MDM) Central Processor Unit (CPU).pdf

    • 资源ID:1018816       资源大小:12.93KB        全文页数:2页
    • 资源格式: PDF        下载积分:10000积分
    快捷下载 游客一键下载
    账号登录下载
    微信登录下载
    二维码
    微信扫一扫登录
    下载资源需要10000积分(如需开发票,请勿充值!)
    邮箱/手机:
    温馨提示:
    如需开发票,请勿充值!快捷下载时,用户名和密码都是您填写的邮箱或者手机号,方便查询和重复下载(系统自动生成)。
    如需开发票,请勿充值!如填写123,账号就是123,密码也是123。
    支付方式: 支付宝扫码支付    微信扫码支付   
    验证码:   换一换

    加入VIP,交流精品资源
     
    账号:
    密码:
    验证码:   换一换
      忘记密码?
        
    友情提示
    2、PDF文件下载后,可能会被浏览器默认打开,此种情况可以点击浏览器菜单,保存网页到桌面,就可以正常下载了。
    3、本站不支持迅雷下载,请使用电脑自带的IE浏览器,或者360浏览器、谷歌浏览器下载即可。
    4、本站资源下载后的文档和图纸-无水印,预览文档经过压缩,下载后原文更清晰。
    5、试题试卷类文档,如果标题没有明确说明有答案则都视为没有答案,请知晓。

    REG NASA-LLIS-1177--2001 Lessons Learned - International Space Station (ISS) Computer Hardware-Software Multiplexer-Demultiplexer (MDM) Central Processor Unit (CPU).pdf

    1、Lessons Learned Entry: 1177Lesson Info:a71 Lesson Number: 1177a71 Lesson Date: 2001-02-01a71 Submitting Organization: HQa71 Submitted by: David M. LengyelSubject: International Space Station (ISS)/Computer Hardware-Software/Multiplexer-Demultiplexer (MDM) Central Processor Unit (CPU) Description of

    2、Driving Event: International Space Station (ISS) Multiplexer-Demultiplexer (MDM) Central Processor Unit (CPU) Utilization Design LimitLesson(s) Learned: The MDMs on the ISS are already at the 65 percent utilization design limit of their central processor unit (CPU) with four major software releases

    3、still to come. There is no identified method for accommodating the inevitable increasing demands on the CPU.Recommendation(s): Proceed expeditiously to upgrade the MDM computer system.Evidence of Recurrence Control Effectiveness: Code M - Concur: Honeywell has completed a concept design of an upgrad

    4、ed processor (from the Intel family) that can be used as card replacement for the CPU card in the enhanced MDM. The time from turn-on to delivery of the new cards was estimated at 24 to 30 months. The replaced enhanced CPU cards could then be used in any Standard MDM requiring additional processing

    5、or memory capability. It should be noted that Boeing was able to reduce the CPU requirements for the C&C software by 20% as part of the revision 2 development. While the pressure has been relieved in the short term, the processor upgrade will continue to be worked.Documents Related to Lesson: Provid

    6、ed by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-N/AMission Directorate(s): a71 Exploration Systemsa71 Space Operationsa71 Aeronautics ResearchAdditional Key Phrase(s): a71 Computersa71 Configuration Managementa71 Flight Operationsa71 Information Technology

    7、/Systemsa71 Policy & Planninga71 Risk Management/Assessmenta71 Softwarea71 Test & VerificationAdditional Info: Approval Info: a71 Approval Date: 2002-03-18a71 Approval Name: Bill Loewya71 Approval Organization: HQa71 Approval Phone Number: 202-358-0528Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-


    注意事项

    本文(REG NASA-LLIS-1177--2001 Lessons Learned - International Space Station (ISS) Computer Hardware-Software Multiplexer-Demultiplexer (MDM) Central Processor Unit (CPU).pdf)为本站会员(刘芸)主动上传,麦多课文档分享仅提供信息存储空间,仅对用户上传内容的表现方式做保护处理,对上载内容本身不做任何修改或编辑。 若此文所含内容侵犯了您的版权或隐私,请立即通知麦多课文档分享(点击联系客服),我们立即给予删除!




    关于我们 - 网站声明 - 网站地图 - 资源地图 - 友情链接 - 网站客服 - 联系我们

    copyright@ 2008-2019 麦多课文库(www.mydoc123.com)网站版权所有
    备案/许可证编号:苏ICP备17064731号-1 

    收起
    展开