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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 ...
Shear shock evolution in soft solids
(Massachusetts Institute of Technology, 2019)
Nonlinear evolution of shear waves into shocks in incompressible elastic materials is investigated using the framework of large deformation elastodynamics, for a family of loadings and commonly used hyperelastic material ...
An Environmental Cost Basis for Regulating Aviation NOx Emissions/
(Massachusetts Institute of Technology, 2019)
Nitrogen oxides and carbon dioxide are two by-products of combustion in aircraft engines, and have different impacts on the environment. Nitrogen oxides (NO[subscript x]) are both an air quality concern and an indirect ...
Environmental and economic characteristics of electrofuel production pathways
(Massachusetts Institute of Technology, 2019)
Electrofuels are liquid fuels derived from CO₂ and electricity, which have the potential to store intermittent renewable power and reduce transportation's climate impact. In this work, I assess the economic and environmental ...
Modeling performance and noise of advanced operational procedures for current and future aircraft
(Massachusetts Institute of Technology, 2017)
Increasing concerns regarding aircraft noise has encouraged the push to reduce noise via operational adjustments. The objective here is thus to expand analysis capabilities to enable modeling of the impact on aircraft noise ...
Human spatial orientation perceptions during simulated lunar landing
(Massachusetts Institute of Technology, 2010)
During crewed lunar landings, astronauts are expected to guide a stable and controlled descent to a landing zone that is level and free of hazards by either making landing point (LP) redesignations or taking direct manual ...
Dynamic human-computer collaboration in real-time unmanned vehicle scheduling
(Massachusetts Institute of Technology, 2010)
Advances in autonomy have made it possible to invert the operator-to-vehicle ratio so that a single operator can control multiple heterogeneous Unmanned Vehicles (UVs). This autonomy will reduce the need for the operator ...
Acquisition and control of a precision formation flying mission
(Massachusetts Institute of Technology, 2010)
Using formation flying spacecraft as space-based interferometers will provide images of unprecedented resolution. Missions such as Stellar Imager plan to use multiple spacecraft in a formation instead of a typical monolithic ...
Investigation of stall inception in centrifugal compressors using isolated diffuser simulations
(Massachusetts Institute of Technology, 2010)
In compression systems the range of stable operating is limited by rotating stall and/or surge. Two distinct types of stall precursors can be observed prior to these phenomena: the development of long-wavelength modal waves ...
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. ...