Now showing items 21-40 of 108

    • Computational Frameworks for Collaborative Multidisciplinary Design of Complex Systems 

      Acton, David E.; Olds, John R. (Georgia Institute of Technology, 1998-09)
      Significant research has been conducted into the development and deployment of analysis integration techniques. This paper discusses these research activities in the context of collaborative frameworks for conceptual ...
    • A Conceptual Design for a SSTO Space Station Service Vehicle 

      Olds, John R. (Georgia Institute of Technology, 1987-10)
      The objective of this research was to design a single-stage-to-orbit aerospace vehicle to service a U.S. space station. Several restrictions were placed on the design, such as minimum landing speed (165 knts.), stability ...
    • A Conceptual Design Tool for RBCC Engine Performance Analysis 

      Olds, John R.; Saks, Greg (Georgia Institute of Technology, 1997-01)
      Recently, a number of vehicle systems utilizing rocket-based combined cycle (RBCC) propulsion have been proposed as possible low-cost space launch solutions. A spreadsheet-based tool has been developed that uses quasi-1D ...
    • Constant Dynamic Pressure Trajectory Simulation in POST 

      Olds, John R.; Budianto, Irene Arianti (Georgia Institute of Technology, 1998-01)
      Future space transportation vehicles may well rely on high speed airbreathing propulsion (ramjets and scramjets) to supply much of their motive power. Because of the tradeoff relationship between engine thrust and vehicle ...
    • Control Authority Network Analysis Applied to Lunar Outpost Deployment 

      Alemany, Kristina; Morse, Elisabeth L.; Easter, Robert W. (Georgia Institute of Technology, 2007-03)
      In order to return humans to the Moon, the Constellation Program will be required to operate a complex network of humans and spacecraft in several locations. This requires an early look at how decision-making authority ...
    • Cost of Safety for Space Transportation 

      Krevor, Zachary C.; Wilhite, Alan W. (Georgia Institute of Technology, 2006-10)
      This paper proposes a methodology that explores the tradeoff between increasing component reliability and utilizing component redundancy as the strategy to meet space transportation reliability requirements. This technique ...
    • Crew Launch Vehicle (CLV) Independent Performance Evaluation 

      Young, David Anthony; Krevor, Zachary C.; Tanner, Christopher; Thompson, Robert W.; Wilhite, Alan W. (Georgia Institute of Technology, 2005-11)
      The crew launch vehicle is a new NASA launch vehicle design proposed by the Exploration Systems Architecture Study (ESAS) to provide reliable transportations of humans and cargo from the earth’s surface to low earth orbit ...
    • Cross-Platform Computational Techniques for Analysis Code Integration and Optimization 

      Olds, John R.; Steadman, Kimberly B. (Georgia Institute of Technology, 1998-09)
      Following NASA's lead in Intelligent Synthesis Environments, advanced vehicle design communities are beginning to explore automated distributed computing frameworks for integrating disciplinary analysis tools. These design ...
    • 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, ...
    • Demonstration of CLIPS as an Intelligent Front-End for POST 

      Budianto, Irene Arianti; Olds, John R.; Baker, Nelson C. (Georgia Institute of Technology, 1999-01)
      Most of the analysis codes used in the design of aerospace systems are complex, requiring some expertise to set up and execute. Usually the Program to Optimize Simulated Trajectories (POST) fails to converge when its control ...
    • 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 ...
    • A Design of Experiments-Based Method for Point Selection in Approximating Output Distributions 

      McCormick, David Jeremy; Olds, John R. (Georgia Institute of Technology, 2002-09)
      The goal of this research is to find a computationally efficient and easy-to-use alternative to current approximation or direct Monte Carlo methods for robust design. More specifically, a technique is sought to use selected ...
    • 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 Multipurpose Low Thrust Interplanetary Trajectory Calculation Code 

      Sakai, Tadashi; Olds, John R. (Georgia Institute of Technology, 2003-08)
      A multipurpose low thrust interplanetary trajectory calculation code has been developed. This code integrates the equations of motion along the trajectory assuming that the spacecraft is subject to a single attracting body ...
    • 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 ...
    • Development of SAMURAI - Simulation and Animation Model Used for Rockets with Adjustable Isp. 

      Sakai, Tadashi; Olds, John R.; Alemany, Kristina (Georgia Institute of Technology, 2005-01)
      An interplanetary trajectory calculation application SAMURAI - Simulation and Animation Model Used for Rockets with Adjustable Isp - has been developed. SAMURAI is written in C++ and calculates transfer trajectories with ...
    • A Distributed Framework for Probabilistic Analysis 

      McCormick, David Jeremy; Olds, John R. (Georgia Institute of Technology, 2002-09)
      Probabilistic multidisciplinary design optimization promises to incorporate critical design uncertainty in order to create optimal products with a high probability of meeting design constraints under a wide variety of ...
    • Economic Uncertainty of Weight and Market Parameters for Advanced Space Launch Vehicles 

      Whitfield, Jeff A.; Olds, John R. (Georgia Institute of Technology, 1998-10)
      This paper reports the results of a study that evaluated the economic risk inherent in market variability and the uncertainty of developing weight estimates for an advanced space launch vehicle program. The purpose of this ...
    • 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 ...