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  • Space Processing  (2)
  • LAUNCH VEHICLES AND SPACE VEHICLES  (1)
  • 2000-2004  (2)
  • 1980-1984  (1)
  • 1
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    Gravity probe-B control subsystem (1983)
    In:  CASI
    Details
    Publication Date: 2019-06-28
    Description: The purpose of this document is to identify and briefly examine the control problems of the proposed Gravity Probe-B spacecraft. Suggestions are made for control thruster geometry, dynamics, and maximum output value. Maximum total thrust is also a consideration since all thrusters expel gaseous helium produced from a common liquid supply. Control philosophy and preliminary designs are presented for both the attitude and drag free control systems. A radial separation of the spacecraft center of mass and the center of the proof mass cavity produces cross coupling between the attitude and drag free systems. The low available thrust implies that this separation, throughout the mission, must be kept within very close tolerance and for this reason an onboard mass balance control system may be necessary. Simulation was performed only to the extent necessary to show the control concepts to be feasible.
    Keywords: LAUNCH VEHICLES AND SPACE VEHICLES
    Type: NASA-TM-82518 , NAS 1.15:82518
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 2
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    Quench Module Insert Capabilities and Development Test Results (2001)
    In:  Other Sources
    Details
    Publication Date: 2019-07-17
    Description: Quench Module Insert is a directional solidification furnace, which will fly in the Materials Science Research Facility. The QMI provides high thermal gradient and quench capabilities for processing metals and alloys in microgravity. This paper will describe the capabilities and present of on-going analysis and development testing.
    Keywords: Space Processing
    Type: Conference and Exhibit on International Space Station Utilization; Oct 15, 2001 - Oct 18, 2001; Cape Canaveral, FL; United States
    Format: text
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    NASA TECHNICAL REPORTS
  • 3
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    Innovative Technologies for a Space Station Microgravity Furnace (2001)
    In:  Other Sources
    Details
    Publication Date: 2019-07-17
    Description: Several Innovations were developed for a high gradient directional solidification vacuum furnace with quench capability, called the Quench Module Insert. The QMI hot zone employs advanced heater elements in a multiple zone configuration and uses a novel instrumentation approach for temperature control. A fiber interface material provides a low friction, high heat extraction interface between a reconfigurable cold zone and the science sample. The quench utilizes a metal phase change to provide rapid, resource efficient quenching of science samples. This paper provides conceptual details and performance data on these innovations.
    Keywords: Space Processing
    Type: Conference and Exhibit on International Space Station Utilization; Oct 15, 2001 - Oct 18, 2001; Cape Canaveral, FL; United States
    Format: text
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    NASA TECHNICAL REPORTS
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