Browsing Theses - Aeronautics and Astronautics by Title
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Browsing Theses - Aeronautics and Astronautics by Title
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(Massachusetts Institute of Technology, 1968)
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(Massachusetts Institute of Technology, 2004)(cont.) Ultimately, this thesis presents two approaches to frequency synthesizer design. The first uses frequency windows of approximately 200 MHz. The 800 MHz to 1 GHz matching network is presented in detail along with ...
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(Massachusetts Institute of Technology, 2013)The primary purpose of an Earth observing spacecraft constellation is to obtain global measurements with improved spatial and temporal resolution. The small size, low cost, standardized form factor, and increasing availability ...
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(Massachusetts Institute of Technology, 2012)Changing aircraft operational procedures is one strategy that can be used to reduce fuel burn and mitigate environmental impacts of aviation in relatively short timeframes with existing aircraft types. One promising ...
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(Massachusetts Institute of Technology, 1979)
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(Massachusetts Institute of Technology, 2014)This study examines the potential fuel burn benefits of altitude and speed optimization in the cruise phase of flight for domestic airlines in the United States. Airlines can achieve cost reductions and reduce environmental ...
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(Massachusetts Institute of Technology, 1991)
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(Massachusetts Institute of Technology, 2009)A fully kinetic, particle-in-cell plasma simulation tool has been incrementally developed by members of the Massachusetts Institute of Technology Space Propulsion Laboratory. Adapting this model to simulate the performance ...
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(Massachusetts Institute of Technology, 2001)A Hall effect plasma thruster with conductive acceleration channel walls was numerically modeled using 2D3V Particle-in-Cell (PIC) and Monte-Carlo Collision (MCC) methodolo- gies. Electron, ion, and neutral dynamics were ...
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(Massachusetts Institute of Technology, 1985)
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(Massachusetts Institute of Technology, 1996)
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(Massachusetts Institute of Technology, 2015)Models used in engineering design often face trade-offs between computational cost and prediction uncertainty. To ameliorate this problem, correlated models of varying fidelities are used together under different fidelity ...
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(Massachusetts Institute of Technology, 2006)Future space structures such as solar power stations and telescopes are expected to be very large. These structures will require on-orbit construction. Due to the risks and costs of human extravehicular work, teams of ...
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(Massachusetts Institute of Technology, 2007)The International Civil Aviation Organization is considering the use of cost-benefit analyses to estimate interdependencies between the industry costs and the major environmental impacts in policy-making for aviation. To ...
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(Massachusetts Institute of Technology, 1994)
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(Massachusetts Institute of Technology, 2002)A gain-scheduling approach for the control of geometrically nonlinear structures is developed. The objective is to improve performance over current linear design techniques that are applied to the same control problem. The ...
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(Massachusetts Institute of Technology, 1970)
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(Massachusetts Institute of Technology, 1994)
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(Massachusetts Institute of Technology, 2004)Computer aided design has allowed many design decisions to be made before hardware is built through "virtual" prototypes: computer simulations of an engineering design. To produce robust systems noise factors must also be ...
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(Massachusetts Institute of Technology, 2005)A pseudospectral method for solving nonlinear optimal control problems is proposed in this thesis. The method is a direct transcription that transcribes the continuous optimal control problem into a discrete nonlinear ...
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