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Modeling of particulate matter creation and evolution in aircraft engines, plumes and particle sampling systems
(Massachusetts Institute of Technology, 2005)
Environmental and health concerns have recently led to growing efforts to characterize the exhaust gas composition of aircraft engines. Besides major chemical species (N₂, 0₂, C0₂ and H₂0), aircraft engines also emit other ...
Boundary layer ingesting inlet design for a silent aircraft
(Massachusetts Institute of Technology, 2005)
(cont.) common nacelle, L/D ratios between 2.5 and 3.0, fan face to throat area ratios above 1.06, and offsets lower than 11%. Curvature ahead of the inlet should be avoided as well as bifurcations inside the duct. Inlet ...
A novel design methodology for enhanced compressor performance based on a dynamic stability metric
(Massachusetts Institute of Technology, 2005)
(cont.) compressor design optimization framework allows a versatile definition of the objective function such that any combination of pressure ratio, efficiency and dynamic stability can be prescribed at various operating ...
Dynamic and thermal control of an electromagnetic formation flight testbed
(Massachusetts Institute of Technology, 2005)
Formation flight of multiple spacecraft is an emerging method for completing complex space missions in an efficient manner. A limitation found in maintaining such formations is the need for precise control at all times. ...
Trust and human performance in automated formation flight station-keeping
(Massachusetts Institute of Technology, 2005)
This thesis primarily describes performance and decision heuristics of human operators intervention with an autonomous formation flight (AFF) system during monitoring of a station-keeping display. Due to mental and physical ...
Modeling aviation's global emissions, uncertainty analysis, and applications to policy
(Massachusetts Institute of Technology, 2005)
(cont.) fuel burn results below 3000 ft. For emissions, the emissions indices were the most influential uncertainties for the variance in model outputs. By employing the model, this thesis examined three policy options for ...
A Gauss pseudospectral transcription for optimal control
(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 ...
The multidisciplinary design and organization of an unconventional, extremely quiet transport aircraft
(Massachusetts Institute of Technology, 2005)
(cont.) aircraft. A design which utilized the results of the trade studies was presented and evaluated. The performance was reviewed in terms of aerodynamics, weight, economics, operations, and acoustics. The resulting ...
Integrated navigation architecture analysis for Moon and Mars exploration
(Massachusetts Institute of Technology, 2005)
The new solar system exploration objectives announced in January 2004 have the goal of sending humans back to the Moon by the year 2020 in preparation for human exploration of Mars. Advanced, but cost effective, surface ...
Probabilistic analysis of compression system stability using importance sampling
(Massachusetts Institute of Technology, 2005)
The probability of instability is computed via a new approach based on Importance Sampling and a dynamic compression system model. In contrast to ordinary Monte Carlo methods Importance Sampling offers reduced confidence ...