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  • Other Sources  (16)
  • 2005-2009  (16)
  • 1
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    Performance of the Extravehicular Mobility Unit (EMU): Airlock Coolant Loop Recovery (A/L CLR) Hardware - Phase II (2009)
    In:  Other Sources
    Details
    Publication Date: 2019-07-19
    Description: An EMU water processing kit (Airlock Coolant Loop Recovery A/L CLR) was developed as a corrective action to Extravehicular Mobility Unit (EMU) coolant flow disruptions experienced on the International Space Station (ISS) in May of 2004 and thereafter. Conservative schedules for A/L CLR use and component life were initially developed and implemented based on prior analysis results and analytical modeling. The examination of postflight samples and EMU hardware in November of 2006 indicated that the A/L CLR kits were functioning well and had excess capacity that would allow a relaxation of the initially conservative schedules of use and component life. A relaxed use schedule and list of component lives was implemented thereafter. Since the adoption of the relaxed A/L CLR schedules of use and component lives, several A/L CLR kit components, transport loop water samples and sensitive EMU transport loop components have been examined to gage the impact of the relaxed requirements. The intent of this paper is to summarize the findings of that evaluation, and to outline updated schedules for A/L CLR use and component life.
    Keywords: Man/System Technology and Life Support
    Type: 39th International Conference on Environmental Systems; Jul 12, 2009 - Jul 16, 2009; Savannah, GA; United States
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  • 2
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    Project Orion, Environmental Control and Life Support System Integrated Studies (2008)
    In:  CASI
    Details
    Publication Date: 2019-07-13
    Description: Orion is the next vehicle for human space travel. Humans will be sustained in space by the Orion subystem, environmental control and life support (ECLS). The ECLS concept at the subsystem level is outlined by function and technology. In the past two years, the interface definition with other subsystems has increased through different integrated studies. The paper presents the key requirements and discusses three recent studies (e.g., unpressurized cargo) along with the respective impacts on the ECLS design moving forward.
    Keywords: Spacecraft Design, Testing and Performance
    Type: SAE-08ICES-01-0198 , JSC-CN-15794 , International Conference on Environmental Sciences; Jun 30, 2008 - Jul 03, 2008; San Francisco, CA; United States
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  • 3
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    Diameter Versus Mass in the Development of the Orion Life Support Umbilical: A Case Study in Systems Engineering (2009)
    In:  Other Sources
    Details
    Publication Date: 2019-07-19
    Description: Systems engineering could also be called the art of compromise. At its heart, systems engineering seeks to find that solution which maximizes the utility of the system, usually compromising the performance of each individual subsystem. While seemingly straightforward, systems engineering methodology is complicated when the utility to be maximized is unclear and the costs to each individual subsystem are not - or not easily - quantifiable. In this paper, we explore one such systems engineering problem within the Constellation Program as a case study in applied systems engineering. During suited operations, astronauts within Orion will be connected to an umbilical to receive and return breathing gas. The pressure drop associated with this umbilical must be overcome by the Orion vehicle. A smaller umbilical, which is desirable for crew operations, means a higher pressure drop, resulting in additional mass and power for the vehicle. We outline the technical considerations in the development of this integrated system and discuss the method by which we reached the ultimate solution. This paper, while just one example of the kind of problem solving that happens every day, offers insight into what happens when the theories of systems engineering are put into practice.
    Keywords: Man/System Technology and Life Support
    Type: JSC-CN-19113 , 40th International Conference on Environmental Systems; Jul 11, 2010 - Jul 15, 2010; Reston, Virginia; United States
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  • 4
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    Crew Exploration Vehicle Environmental Control and Life Support Development Status (2009)
    In:  Other Sources
    Details
    Publication Date: 2019-07-19
    Description: The Orion Crew Exploration Vehicle (CEV) is the first crew transport vehicle to be developed by the National Aeronautics and Space Administration (NASA) in the last thirty years. The CEV is being developed to transport the crew safely from the Earth to the Moon and back again. This year, the vehicle continued to go through design refinements to reduce weight, meet requirements, and operate reliably. Preliminary Design Review was performed and long lead procurement items were started. The design of the Orion Environmental Control and Life Support (ECLS) system, which includes the life support and active thermal control systems, is progressing through the design stage into manufacturing. This paper covers the Orion ECLS development from April 2009 to April 2010.
    Keywords: Man/System Technology and Life Support
    Type: JSC-CN-19223
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  • 5
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    Asteroid Exploration and Exploitation (2006)
    In:  CASI
    Details
    Publication Date: 2019-08-17
    Description: John S. Lewis is Professor of Planetary Sciences and Co-Director of the Space Engineering Research Center at the University of Arizona. He was previously a Professor of Planetary Sciences at MIT and Visiting Professor at the California Institute of Technology. Most recently, he was a Visiting Professor at Tsinghua University in Beijing for the 2005-2006 academic year. His research interests are related to the application of chemistry to astronomical problems, including the origin of the Solar System, the evolution of planetary atmospheres, the origin of organic matter in planetary environments, the chemical structure and history of icy satellites, the hazards of comet and asteroid bombardment of Earth, and the extraction, processing, and use of the energy and material resources of nearby space. He has served as member or Chairman of a wide variety of NASA and NAS advisory committees and review panels. He has written 17 books, including undergraduate and graduate level texts and popular science books, and has authored over 150 scientific publications.
    Keywords: General
    Type: Proceedings of the Next Generation Exploration Conference; 60-73; NASA/CP-2006-214551|Next Generation Exploration Conference; Aug 16, 2006 - Aug 18, 2006; Moffett Field, CA; United States
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  • 6
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    Extravehicular Mobility Unit (EMU) / International Space Station (ISS) Coolant Loop Failure and Recovery (2006)
    In:  CASI
    Details
    Publication Date: 2019-07-13
    Description: Following the Colombia accident, the Extravehicular Mobility Units (EMU) onboard ISS were unused for several months. Upon startup, the units experienced a failure in the coolant system. This failure resulted in the loss of Extravehicular Activity (EVA) capability from the US segment of ISS. With limited on-orbit evidence, a team of chemists, engineers, metallurgists, and microbiologists were able to identify the cause of the failure and develop recovery hardware and procedures. As a result of this work, the ISS crew regained the capability to perform EVAs from the US segment of the ISS.
    Keywords: Spacecraft Design, Testing and Performance
    Type: SAE-2006-01-2240 , ICES; Jul 16, 2006 - Jul 19, 2006; Norfolk, VA; United States
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  • 7
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    Crew Exploration Vehicle Environmental Control and Life Support Emergency Gas Consumable Sizing (2007)
    In:  Other Sources
    Details
    Publication Date: 2019-07-13
    Description: As part of preparing for the Crew Exploration Vehicle (CEV), the National Aeronautics and Space Administration (NASA) worked on developing the requirements that drive the emergency gas consumables. Emergency gas is required to support Extravehicular Activities (EVA), maintain the cabin pressure during a cabin leak for the crew to don their suits, and to recover the cabin following a toxic even or a fire.
    Keywords: Man/System Technology and Life Support
    Type: 07ICES-174 , International Conference on Environmental Sciences; Jul 09, 2007 - Jul 12, 2007; Chicago, IL; United States
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  • 8
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    Boeing Crew Exploration Vehicle Environmental Control and Life Support System Architecture Overview (2007)
    In:  Other Sources
    Details
    Publication Date: 2019-07-13
    Description: The Boeing Company under the teaming agreement with the Northrop Grumman Systems Corporation and in compliance with the NASA Phase 1 contract, had the responsibilities for the CEV architecture development of the Environmental control and life support (ECLS) system under the NASA Phase 1 contract. The ECLS system was comprised of the various subsystems which provided for a shirt-sleeve habitable environment for crew to live and work in the crew module of the CEV. This architecture met the NASA requirements to ferry cargo and crew to ISS, and Lunar sortie missions, with extensibility to long duration missions to Moon and MARS. This paper provides a summary overview of the CEV ECLS subsystems which was proposed in compliance with the contract activities.
    Keywords: Spacecraft Design, Testing and Performance
    Type: Rept-07ICES-284 , International Conference of Environmental Systems; Jul 09, 2007 - Jul 12, 2007; Chicago, IL; United States
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  • 9
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    Crew Exploration Vehicle Environmental Control and Life Support Fire Protection Approach (2007)
    In:  CASI
    Details
    Publication Date: 2019-07-13
    Description: As part of preparing for the Crew Exploration Vehicle (CEV), the National Aeronautics and Space Administration (NASA) worked on developing the requirements to manage the fire risk. The new CEV poses unique challenges to current fire protection systems. The size and configuration of the vehicle resembles the Apollo capsule instead of the current Space Shuttle or the International Space Station. The smaller free air volume and fully cold plated avionic bays of the CEV requires a different approach in fire protection than the ones currently utilized. The fire protection approach discussed in this paper incorporates historical lessons learned and fire detection and suppression system design philosophy spanning from Apollo to the International Space Station. Working with NASA fire and materials experts, this approach outlines the best requirements for both the closed out area of the vehicle, such as the avionics bay, and the crew cabin area to address the unique challenges due to the size and configuration of the CEV.
    Keywords: Man/System Technology and Life Support
    Type: 2007-07ICES-231 , 37th International COfnerence on Environmental Systems; Jul 09, 2007 - Jul 12, 2007; Chicago, IL; United States
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  • 10
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    Crew Exploration Vehicle Environmental Control and Life Support Design Reference Missions (2007)
    In:  Other Sources
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    Publication Date: 2019-07-13
    Description: In preparation for the contract award of the Crew Exploration Vehicle (CEV), the National Aeronautics and Space Administration (NASA) produced two design reference missions for the vehicle. The design references used teams of engineers across the agency to come up with two configurations. This process helped NASA understand the conflicts and limitations in the CEV design, and investigate options to solve them.
    Keywords: Man/System Technology and Life Support
    Type: Rept-07ICES-173 , International Conference of Environmental Systems; Jul 09, 2007 - Jul 12, 2007; Chicago, IL; United States
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