Browsing Aeronautics and Astronautics - Master's degree by Title
Now showing items 1823-1842 of 2195
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Safe and robust reinforcement learning with neural network policies
(Massachusetts Institute of Technology, 2019)Autonomous vehicles operate in safety-critical environments, but heavily rely on seemingly black-box predictions from Deep Neural Networks. The danger of this reliance arises from the vulnerability of neural networks. ... -
Safe distributed coordination of heterogeneous robots through dynamic simple temporal networks
(Massachusetts Institute of Technology, 2003) -
Safe intention-aware maneuvering of autonomous vehicles
(Massachusetts Institute of Technology, 2019)In order to improve driving performance, while achieving safety in a dynamic environment, it is crucial for a vehicle motion planner to be aware of the intentions of the surrounding agent vehicles. Many existing approaches ... -
Safety analysis of TCAS on Global Hawk using airspace encounter models
(Massachusetts Institute of Technology, 2006)The U.S. Air Force's RQ-4 Global Hawk unmanned aerial vehicle (UAV) is a high altitude, long endurance aircraft used for surveillance and reconnaissance. Because of the potential for close proximity to manned aircraft in ... -
Safety considerations for operation of different classes of unmanned aerial vehicles in the National Airspace System
(Massachusetts Institute of Technology, 2005)There is currently a broad effort underway in the United States and internationally by several organizations to craft regulations enabling the safe operation of UAVs in the NAS. Current federal regulations governing unmanned ... -
A safety-centered approach to developing new air traffic management tools
(Massachusetts Institute of Technology, 2001) -
Safety-critical software testing in airborne systems : the modified condition/decision coverage criterion
(Massachusetts Institute of Technology, 1999)In order to be certified by the FAA, airborne software must comply with the D0-178B standard. For the unit testing of safety-critical software, this standard requires the testing process to meet a strong source code structure ... -
Safety-driven system engineering process
(Massachusetts Institute of Technology, 2008)As the demand for high-performing complex systems has increased, the ability of engineers to meet that demand has not kept pace. The creators of the traditional system engineering processes did not anticipate modern complex ... -
Sailing flight, description and discussion of a new method of motorless flying
(Massachusetts Institute of Technology, 1927) -
Sampling-based path planner for guided airdrop in urban environments
(Massachusetts Institute of Technology, 2017)Aerial resupply can deliver cargo to locations across the globe. A challenge for modern guided parafoil systems is to land accurately in complex terrain, including canyons and cities. This thesis presents the Rewire-RRT ... -
Satellite constellation design for mid-course ballistic missile intercept
(Massachusetts Institute of Technology, 2004)This thesis will establish a conceptual approach to the design of constellations for satellite-based mid-course missile defense. The ballistic missile intercept problem leads to a new paradigm of coverage where interceptor ... -
Satellite System Safety Analysis Using STPA
(Massachusetts Institute of Technology, 2013)Traditional hazard analysis techniques based on failure models of accident causality, such as the probabilistic risk assessment (PRA) method currently used at NASA, are inadequate for analyzing safety at the system level. ... -
Scalable network localization
(Massachusetts Institute of Technology, 2017)This thesis introduces the Peregrine system, the first known real-time cooperative 3D wireless localization network. The Peregrine system comprises two major components: a hardware testbed; and a suite of distributed ... -
Scale and computer modeling of wheeled vehicles for planetary exploration
(Massachusetts Institute of Technology, 1990) -
Scaling considerations for small aircraft engines
(Massachusetts Institute of Technology, 2008)Small aircraft engines traditionally have poorer performance compared to larger engines, which until recently, has been a factor that outweighed the aerodynamic benefits of commoditized and distributed propulsion. Improvements ... -
Scaling of impeller response to impeller-diffuser interactions in centrifugal compressors
(Massachusetts Institute of Technology, 2008)A numerical investigation has been conducted to quantify the effect of impeller-diffuser interaction on changes in impeller performance. An assessment is made of the hypothesis that the nondimensional parameter characterizing ... -
The second skin approach : skin strain field analysis and mechanical counter pressure prototyping for advanced spacesuit design
(Massachusetts Institute of Technology, 2005)The primary aim of this thesis is to advance the theory of advanced locomotion mechanical counter pressure (MCP) spacesuits by studying the changes in the human body shape during joint motion. Two experiments take advantage ... -
Secondary air interaction with main flow in axial turbines
(Massachusetts Institute of Technology, 2011)Secondary air, known as purge air, is injected through seals in the hub and shroud of axial turbines to prevent hot gas ingestion into the endwall cavities. An investigation into the interaction of purge ow with turbine ... -
Self-customized electronic procedures for Just In Time training of space telerobotics
(Massachusetts Institute of Technology, 2018)Astronauts on Long Duration Missions (LDMs) will face complex problems for which they are untrained. Rehearsal may be unfeasible; the task need be completed on the first attempt and preparation is limited to a review of ... -
Semi-analytical model of ionization oscillations in Hall thrusters
(Massachusetts Institute of Technology, 2015)This thesis presents efforts to better understand the breathing-mode oscillation within Hall thrusters. These oscillations have been present and accepted within Hall thrusters for decades, but recent interest in the ...
