Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 34 for “"Spacecraft design"”.
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Centimeter-Scale Spacecraft: Design, Fabrication, And Deployment
… Many of these components are suitable for use in spacecraft. Their availability has led to the ongoing revolution in small satellites, most visibly exemplified by the CubeSat standard. This study seeks to push these trends toward their ultimate extreme: a satellite-on-a-chip. The ability to mass …
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Pluto fast flyby spacecraft design and development
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Aeronautics and Astronautics, 1994.
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Evolutionary Spacecraft Design Using a Generalized Component-Resource Model
… developed for modeling and optimizing conceptual spacecraft designs. Its goal is to remain sufficiently general to address any space mission without modification of the developed model or code. Spacecraft are modeled as a collection of components and the resources that flow between them. New …
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Small Spacecraft Design & Machine Learning-based Approaches To Lunar Robotics Navigation
… renewal of lunar navigation systems with small spacecraft, 2) a machine learning-based approach to lunar hopper control, and 3) a machine learning-based approach to small rover path planning. In the first topic, a new triangulation theory that enables the creation of lunar global navigation …
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Additive Manufacturing in Spacecraft Design and In-Space Robotic Fabrication of Large Structures
… offer several advantages compared to traditional spacecraft architectures including increased access to space, lower development costs, and disaggregated architectures. On-orbit manufacturing and assembly have become major research and development topics for government and commercial entities …
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Development of a model-based systems engineering architecture for an unmanned cargo spacecraft design
Unmanned Cargo Spacecraft (UCS) systems involve exceedingly complex systems engineering and design in order to implement. UCS typically include a vast range of subsystems – Command and Data Handling (C&DH), Attitude Determination and Control System (ADCS), Propulsion, Guidance, Navigation, and …
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Spacecraft design-for-demise strategy, analysis and impact on low earth orbit space missions
… Consequently, not only will such a mission design be relatively simpler and cheaper, but also mission unavailability risk due to a controlled reentry subsystem failure is eliminated, which improves mission on-orbit reliability and robustness. Intentionally re-designing the mission such that …
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Weaving time into system architecture : new perspectives on flexibility, spacecraft design lifetime, and on-orbit servicing
… treatment of issues of flexibility in system design is developed that addresses the following questions: 1) What are the characteristic features of flexibility in system design? Can one clearly and unambiguously characterize flexibility, and disentangle it from closely related concepts? 2) …
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Characterization of commercial step-down converter performance in the low Earth orbit radiation environment
… Commercial space industry is shifting spacecraft design philosophy toward accepting more risk for shorter lead times, lower costs, and high instrument performance. This shift opens up the Commercial Off The Shelf (COTS) electronics market to space applications. To quantify the risks …
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The HETE-II primary ground station system and electronics
… of a satellite mission. With the shift in spacecraft design to provide increased autonomy, the ground station design will also undergo a similar paradigm shift. This thesis describes one such ground station design, which supports the HETE-II (High Energy Transient Explorer) mission. The …
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Optimal finite-thrust Trans-Earth Injection (TEI) maneuvers for a Low Lunar Orbit (LLO) earth return mission
… which has a negative impact on the overall spacecraft design. This thesis uses a pseudospectral optimal control solver, DIDO, to solve for a fuel optimal moon-to-earth trajectory using only the auxiliary engines of the Orion Crew Exploration Vehicle (CEV) for the entire mission. …
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A trade space model for robotic lunar exploration
… trade space of potential in situ robotic lunar spacecraft designs. A science value model was developed, using Multi-Attribute Utility Theory (MAUT), to estimate the effectiveness of a spacecraft design towards assessing a set of specified science objectives. An engineering model was developed to …
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Concepts and technology development for the autonomous assembly and reconfiguration of modular space systems
… The first example is a fully modular spacecraft design, which has standardized and reconfigurable components with multiple decoupled subsystems. This concept was developed into a testbed called Self-assembling Wireless Autonomous and Reconfigurable Modules (SWARM). This project sought …
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Trajectory design and control for formation flying spaceborne interferometers
… during observation and retargeting of the spacecraft formations, to thereby maximize the number of observations that can be taken with a given amount of consumables, and (2) determine computationally efficient control techniques to minimize control effort while meeting image synthesis …
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Internal Torques and Forces in Gyrostats with Magnetically Suspended Rotors
… bearings have several potential applications in spacecraft design. Based on the gyrostat model, we develop equations that describe the internal torques and forces that occur between the body and one of the attached wheels. We evaluate the transverse torques for the torque--free gyrostat and a …
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Statistical risk estimation for communication system design
Spacecraft are complex systems that involve many subsystems and multiple relationships among them. The design of a spacecraft is an evolutionary process that starts from requirements and evolves over time. During this process, changes can affect mass and power at component, subsystem, and system …
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Multidisciplinary structural design and optimization for performance, cost, and flexibility
… performance are two key factors in structural design. In the aerospace and automotive industries, this is particularly true with respect to design criteria such as strength, stiffness, mass, fatigue resistance, manufacturing cost, and maintenance cost. This design philosophy of reducing cost …
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Exploring the Concept of a Deep Space Solar-Powered Small Spacecraft
… Voyager 1 & 2, and Pioneer 10 & 11 are the only spacecraft to ever venture past Pluto and provide information about space at those large distances. These spacecraft were very expensive and primarily designed to study planets during gravitational assist maneuvers. They were not designed to explore …
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Adaptive thermal modeling architecture for small satellite applications
… of moving towards smaller, better, and cheaper spacecraft to support the nation's increasing dependence on space-based technologies. Whether large or small, all spacecraft will require the same basic bus systems and environmental protection, simply scaled to fit the mission. The varying thermal …
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