REG NASA-LLIS-0191-1992 Lessons Learned - Preintegrated Truss (PIT) Sections for Space Station Freedom.pdf

上传人:cleanass300 文档编号:1017842 上传时间:2019-03-21 格式:PDF 页数:2 大小:13.09KB
下载 相关 举报
REG NASA-LLIS-0191-1992 Lessons Learned - Preintegrated Truss (PIT) Sections for Space Station Freedom.pdf_第1页
第1页 / 共2页
REG NASA-LLIS-0191-1992 Lessons Learned - Preintegrated Truss (PIT) Sections for Space Station Freedom.pdf_第2页
第2页 / 共2页
亲,该文档总共2页,全部预览完了,如果喜欢就下载吧!
资源描述

1、Lessons Learned Entry: 0191Lesson Info:a71 Lesson Number: 0191a71 Lesson Date: 1992-11-04a71 Submitting Organization: KSCa71 Submitted by: David PenningtonSubject: Preintegrated Truss (PIT) Sections for Space Station Freedom Description of Driving Event: The use of truss segments, which are preinteg

2、rated with distributed systems and verified on the ground instead of erected on-orbit, has reduced technical risk and made the space station a more viable program. The preintegrated truss members (PIT) must be heavier than the original truss elements per running foot because the entire mass of the P

3、IT is subjected to launch loads.PIT members are aluminum I-beams bolted together instead of the more flexible graphite composite elements that previously were part of the design. The heavier construction allows orbit replaceable units (ORUS) to be located in their optimum positions for accessibility

4、.One benefit of the restructured design is that EVA time has been reduced considerably so that EVA targets are now feasible. This has been accomplished by reducing the demand for EVAs and increasing the efficiency of those that must be performed.In the assembly of the PIT sections on-orbit, a captur

5、e latch provides final alignment by engaging guide pins after the sections are brought into proximity by the space shuttle remote manipulator arm. Motorized bolts then make the final latch-up. There is a chance that these sections may not line up correctly; therefore, damage may occur to the guide p

6、ins and bolts when the motorized bolts engage. Because the PIT sections will be assembled on the ground, the opportunity exists to test the alignment and mating procedures prior to flight.Lesson(s) Learned: The capture latch guide pins and motorized bolts used to couple the assemblies are not always

7、 in proper alignment. This could damage guide pins.Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-Recommendation(s): Develop a hardware test encompassing the full range of misalignments, tolerances, and impacts that might reasonably be expected to o

8、ccur.Evidence of Recurrence Control Effectiveness: N/ADocuments Related to Lesson: N/AMission Directorate(s): a71 Space Operationsa71 Exploration SystemsAdditional Key Phrase(s): N/AAdditional Info: Approval Info: a71 Approval Date: 1994-06-06a71 Approval Name: James G. Klinea71 Approval Organization: KSC/HEIa71 Approval Phone Number: 407-867-7614Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-

展开阅读全文
相关资源
猜你喜欢
  • GOST R ISO IEC 90003-2014 Software engineering Guidelines for the application of ISO 9001 2008 to computer software《软件工程 ISO 9001-2008计算机软件应用指南》.pdf GOST R ISO IEC 90003-2014 Software engineering Guidelines for the application of ISO 9001 2008 to computer software《软件工程 ISO 9001-2008计算机软件应用指南》.pdf
  • GOST R ISO IEC 9066-1-1993 Information processing systems Text communication Reliable transfer Part 1 Model and service definition《信息处理系统 文本通信 可靠传输 第1部分 模型和服务定义》.pdf GOST R ISO IEC 9066-1-1993 Information processing systems Text communication Reliable transfer Part 1 Model and service definition《信息处理系统 文本通信 可靠传输 第1部分 模型和服务定义》.pdf
  • GOST R ISO IEC 9066-2-1993 Information processing systems Text communication Reliable transfer Part 2 Protocol specification《信息处理系统 文本通信 可靠传输 第2部分 协议规范》.pdf GOST R ISO IEC 9066-2-1993 Information processing systems Text communication Reliable transfer Part 2 Protocol specification《信息处理系统 文本通信 可靠传输 第2部分 协议规范》.pdf
  • GOST R ISO IEC 9067-1998 Information technology Data communication Automatic fault isolation procedures using test loops《信息技术 数据通信 使用测试回路的自动故障隔离规程》.pdf GOST R ISO IEC 9067-1998 Information technology Data communication Automatic fault isolation procedures using test loops《信息技术 数据通信 使用测试回路的自动故障隔离规程》.pdf
  • GOST R ISO IEC 9072-1-1993 Information processing systems Text communication Remote operations Part 1 Model notation and service definition《信息处理系统 文本通信 远程操作 第1部分 模型 符号 服务定义》.pdf GOST R ISO IEC 9072-1-1993 Information processing systems Text communication Remote operations Part 1 Model notation and service definition《信息处理系统 文本通信 远程操作 第1部分 模型 符号 服务定义》.pdf
  • GOST R ISO IEC 9072-2-1993 Information processing systems Text communication Remote operations Part 2 Protocol specification《信息处理系统 文本通信 远程操作 第2部分 协议规范》.pdf GOST R ISO IEC 9072-2-1993 Information processing systems Text communication Remote operations Part 2 Protocol specification《信息处理系统 文本通信 远程操作 第2部分 协议规范》.pdf
  • GOST R ISO IEC 9075-1993 Information processing systems Database language SQL with Integrity Enhancement《信息处理系统 集成增强数据库语言SQL》.pdf GOST R ISO IEC 9075-1993 Information processing systems Database language SQL with Integrity Enhancement《信息处理系统 集成增强数据库语言SQL》.pdf
  • GOST R ISO IEC 9126-1993 Information technology Software product evaluation Quality characteristics and guidelines for their use《信息技术 软件产品评估 质量特性及其使用指南》.pdf GOST R ISO IEC 9126-1993 Information technology Software product evaluation Quality characteristics and guidelines for their use《信息技术 软件产品评估 质量特性及其使用指南》.pdf
  • GOST R ISO IEC 9545-1998 Information technology Open systems interconnection Application layer structure《信息技术 开放式系统互连 应用层架构》.pdf GOST R ISO IEC 9545-1998 Information technology Open systems interconnection Application layer structure《信息技术 开放式系统互连 应用层架构》.pdf
  • 相关搜索

    当前位置:首页 > 标准规范 > 国际标准 > 其他

    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