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Autonomous thruster failure recovery for underactuated spacecraft
(Massachusetts Institute of Technology, 2010)
Thruster failures historically account for a large percentage of failures that have occurred on orbit. Therefore, autonomous thruster failure detection, isolation, and recovery (FDIR) is an essential component to any robust ...
Lunar landing : dynamic operator interaction with multi-modal automation systems
(Massachusetts Institute of Technology, 2011)
The ability of operators to "gracefully transition" (maintaining control and awareness of the system without excessive workload or decrements in flight performance) between levels of automation (LOA) in several case studies ...
Loss mechanisms in turbine tip clearance flows
(Massachusetts Institute of Technology, 2011)
Numerical simulations of tip clearance ow have been carried out to dene the loss generation mechanisms associated with tip leakage in unshrouded axial turbines. Mix- ing loss between the leakage, which takes the form of a ...
Analysis of global airline alliances as a strategy for international network development
(Massachusetts Institute of Technology, 2012)
Since the late 1990s, network airlines worldwide have being enrolling in one of the three current Global Airline Alliances (GALs), oneworld, Star Alliance and SkyTeam. By 2011, airlines belonging to the three GALs transported ...
A program risk assessment method for aviation technology transitions
(Massachusetts Institute of Technology, 2011)
This work presents a method for assessing the potential impacts of program risks on aviation technology transitions. It first establishes a framework that provides a methodology to complete the assessment of those risks. ...
A tilt rotor UAV for long endurance operations in remote environments
(Massachusetts Institute of Technology, 2011)
Extended mission times will greatly expand the utility of small UAVs that are currently limited to a single flight lasting no more than a few hours. This thesis assesses the challenges to developing a small, long endurance ...
Design and control of an autonomous variable-pitch quadrotor helicopter
(Massachusetts Institute of Technology, 2012)
The aerospace community, particularly in academia, has seen a recent rise in the popularity of fixed-pitch quadrotor helicopters. The fixed-pitch quadrotor is popular largely because of its mechanical simplicity relative ...
The air quality and health impacts of aviation in Asia
(Massachusetts Institute of Technology, 2012)
Aviation in Asia is growing more rapidly than other regions around the world. Adverse health impacts of aviation are linked to an increase in the concentration of particulate matter smaller than 2.5 [mu]m in diameter ...
An evaluation of short innovation contest implementation in the federal context
(Massachusetts Institute of Technology, 2013)
Technologies over the past three decades have democratized the tools of knowledge creation, thus creating increasing communities of innovators outside traditional organizations' boundaries. Cost effective ways of leveraging ...
The effect of dust blowback on spatial orientation estimation during lunar landing
(Massachusetts Institute of Technology, 2013)
Landing is a dangerous and complex phase of any flight. Landing on an airless, dusty world presents unique challenges to perception, including dust blowback. During crewed lunar landings, astronauts will either be directly ...