Now showing items 1-20 of 27

    • Analysis of Human-System Interaction For Landing Point Redesignation 

      Chua, Zarrin K. (Georgia Institute of Technology, 2009-05-26)
      Despite two decades of manned spaceflight development, the recent thrust for increased human exploration places significant demands on current technology. More information is needed in understanding how human control affects ...
    • An Approximate Ablative Thermal Protection System Sizing Tool for Entry System Design 

      Dec, John A.; Braun, Robert D. (Georgia Institute of Technology, 2006-01)
      A computer tool to perform entry vehicle ablative thermal protection systems sizing has been developed. Two options for calculating the thermal response are incorporated into the tool. One, an industry-standard, high-fidelity ...
    • Cadmus: A Europa Lander Mission Concept 

      Thompson, Robert W.; Francis, Scott R.; Olsen, Randy; Coffman, Robbie; Braun, Robert D.; Parsons, Michael (Georgia Institute of Technology, 2005-03)
      The Cadmus mission responds to the need for a Europa surface exploration mission in the 2021 time frame that complements and extends the science performed by the Jupiter Icy Moons Orbiter (JIMO) and Galileo spacecraft. ...
    • Challenges of Mars Entry, Descent and Landing 

      Braun, Robert D.; Manning, Robert M. (Georgia Institute of Technology, 2006-03)
      The United States has successfully landed five robotic systems on the surface of Mars. These systems all had landed mass below 0.6 metric tons (t), had landed footprints on the order of hundreds of km and landed at ...
    • Computational Fluid Dynamics Validation of a Single, Central Nozzle Supersonic Retropropulsion Configuration 

      Cordell, Christopher E., Jr.; Braun, Robert D. (Georgia Institute of Technology, 2009-05)
      Supersonic retropropulsion provides an option that can potentially enhance drag characteristics of high mass entry, descent, and landing systems. Preliminary flow field and vehicle aerodynamic characteristics have been ...
    • Daedalon: A Revolutionary Morphing Spacecraft Design for Planetary Exploration 

      Lafleur, Jarret M.; Olds, John R.; Braun, Robert D. (Georgia Institute of Technology, 2005-01)
      The product of a study sponsored by the NASA Institute for Advanced Concepts (NIAC), Daedalon is a spacecraft design baselined for Mars which utilizes morphing wing technology to achieve the design objective of a standard, ...
    • Design of a Long Endurance Titan VTOL Vehicle 

      Prakash, Ravi; Braun, Robert D.; Colby, Luke S.; Francis, Scott R.; Gündüz, Mustafa E.; Flaherty, Kevin W.; Lafleur, Jarret M.; Wright, Henry S. (Georgia Institute of Technology, 2006-03)
      Saturn's moon Titan promises insight into many key scientific questions, many of which can be investigated only by in situ exploration of the surface and atmosphere of the moon. This research presents a vertical takeoff ...
    • Design Space Pruning Techniques for Low-Thrust, Multiple Asteroid Rendezvous Trajectory Design 

      Alemany, Kristina; Braun, Robert D. (Georgia Institute of Technology, 2007-09)
      In 2006, the 2nd Global Trajectory Optimization Competition (GTOC2) posed a “Grand Asteroid Tour” trajectory optimization problem, where participants were required to find the best possible low-thrust trajectory that ...
    • Development of a Planetary Entry System Synthesis Tool for Conceptual Design and Analysis 

      Kipp, Devin M.; Dec, John A.; Wells, Grant William; Braun, Robert D. (Georgia Institute of Technology, 2005-06)
      A Planetary Entry Systems Synthesis Tool, with applications to conceptual design and modeling of entry systems has been developed. This tool is applicable to exploration missions that employ entry, descent and landing or ...
    • Entry Descent and Landing Challenges of Human Mars Exploration 

      Wells, Grant William; Lafleur, Jarret M.; Verges, Amanda; Manyapu, Kavya; Christian, John A., III; Lewis, Charity; Braun, Robert D. (Georgia Institute of Technology, 2006-02)
      Near-term capabilities for robotic spacecraft include a target of landing 1 - 2 metric ton payloads with a precision of about 10 kilometers, at moderate altitude landing sites (as high as +2 km MOLA). While challenging, ...
    • An Entry Handbook for the Conceptual Design of Mars Missions 

      Wells, Grant William; Braun, Robert D. (Georgia Institute of Technology, 2006-05)
      The purpose of this investigation is to investigate trends in Mars entry, descent and landing conceptual mission design and propose a method of presenting this information as a handbook for conceptual design. The premise ...
    • Entry System Options for Human Return from the Moon and Mars 

      Putnam, Zachary R.; Braun, Robert D.; Rohrschneider, Reuben R.; Dec, John A. (Georgia Institute of Technology, 2005-08)
      Earth entry system options for human return missions from the Moon and Mars were analyzed and compared to identify trends among the configurations and trajectory options and to facilitate informed decision making at the ...
    • An Evaluation of Ballute Entry Systems for Lunar Return Missions 

      Clark, Ian G.; Braun, Robert D.; Theisinger, John; Wells, Grant William (Georgia Institute of Technology, 2006-08)
      This study investigates the advantages and feasibility of using ballutes for Earth entry at lunar return velocities. Using analysis methods suitable for conceptual design and assuming a CEV type entry vehicle, multiple ...
    • Flight System Options for a Long Duration Mars Airplane 

      Rohrschneider, Reuben R.; Olds, John R.; Kuhl, Christopher A.; Braun, Robert D.; Steffes, Stephen R.; Hutchinson, Virgil L., Jr. (Georgia Institute of Technology, 2004-09)
      The goal of this study was to explore the flight system options for the design of a long endurance Mars airplane mission. The mission model was built in the design framework ModelCenter and a combination of a hybrid and ...
    • Improving Lunar Return Entry Footprints Using Enhanced Skip Trajectory Guidance 

      Putnam, Zachary R.; Braun, Robert D.; Bairstow, S. H.; Barton, G. H. (Georgia Institute of Technology, 2006-09)
      The impending development of NASA's Crew Exploration Vehicle (CEV) will require a new entry guidance algorithm that provides sufficient performance to meet all requirements. This study examined the effects on entry footprints ...
    • The Mars Airplane: A Credible Science Platform 

      Braun, Robert D.; Wright, Henry S.; Croom, Mark A.; Levine, Joel S.; Spencer, David A. (Georgia Institute of Technology, 2004-03)
      Significant technology advances have enabled planetary aircraft to be considered as viable science platforms. Such systems fill a unique planetary science measurement gap, that of regional-scale, near-surface observation, ...
    • Mars Entry, Descent, and Landing Parametric Sizing and Design Space Visualization Trades 

      Alemany, Kristina; Wells, Grant William; Theisinger, John; Clark, Ian G.; Braun, Robert D. (Georgia Institute of Technology, 2006-08)
      Entry, descent, and landing (EDL) is a multidimensional, complex problem, which is difficult to visualize in simple plots. The purpose of this work is to develop a systematic visualization scheme that could capture Mars ...
    • Mars Gravity Biosatellite: Engineering, Science, and Education 

      Korzun, Ashley M.; Braun, Robert D.; Wagner, Erika B.; Fulford-Jones, Thaddeus R.F.; Deems, Elizabeth C.; Judnick, Daniel C.; Keesee, John E. (Georgia Institute of Technology, 2007-09)
      The Mars Gravity Biosatellite is a novel program aimed at providing data on the effects of partial gravity on mammalian physiology. Physiological problems intrinsic to prolonged stays in microgravity have long been ...
    • Modeling Approach for Analysis and Optimization of a Long-Duration Mars Airplane 

      Rohrschneider, Reuben R.; Olds, John R.; Braun, Robert D.; Hutchinson, Virgil L., Jr.; Kuhl, Christopher A.; Steffes, Stephen R. (Georgia Institute of Technology, 2004-05)
      The goal of this study was to determine the best system level modeling tool for the design of a long endurance Mars airplane mission, and to use this tool to determine the best configuration for the aircraft. The mission ...
    • Nuclear Gas Turbine Propulsion System for Long Endurance Titan Exploration 

      Colby, Luke S.; Prakash, Ravi; Braun, Robert D. (Georgia Institute of Technology, 2005-07)
      An innovative propulsion system concept that enables powered flight on Saturn’s largest moon, Titan, is discussed. This propulsion system concept uses waste heat from a NASA Multi-Mission Radioisotopic Thermoelectric ...