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Multiple hypothesis positioning algorithm for robust GPS-denied navigation
(Massachusetts Institute of Technology, 2018)
In the past few decades, GPS has become the dominant source of precision navigation and is often required for many modern systems to operate. However, recent exposure of GPS vulnerabilities have called into question its ...
Characterization of commercial step-down converter performance in the low Earth orbit radiation environment
(Massachusetts Institute of Technology, 2019)
We characterize three commercial step-down DC-DC converters for the Low Earth Orbit (LEO) space radiation environment. Commercial space industry is shifting spacecraft design philosophy toward accepting more risk for shorter ...
Manufacture of aerospace-grade thermoset and thermoplastic composites via nanoengineered thermal processing
(Massachusetts Institute of Technology, 2019)
Aerospace manufacturers continue to rely on composite materials to make aerovehicles lighter and stronger, particularly employing carbon fiber reinforced plastics (CFRP) using carbon microfiber reinforcement with thermoset ...
Impacts of ancillary services on airline revenue management
(Massachusetts Institute of Technology, 2019)
Ancillary services have been contributing increasing amounts to airlines' total revenue. Over the past decade, the number of ancillary services offered by airlines has proliferated, the quality has improved, and they have ...
Information-rich path planning under general constraints using Rapidly-exploring Random Trees
(Massachusetts Institute of Technology, 2010)
This thesis introduces the Information-rich Rapidly-exploring Random Tree (IRRT), an extension of the RRT algorithm that embeds information collection as predicted using Fisher information matrices. The primary contribution ...
Multiple relative pose graphs for cooperative mapping
(Massachusetts Institute of Technology, 2010)
This thesis describes a new representation and algorithm for cooperative and persistent simultaneous localization and mapping (SLAM) using multiple robots. Recent pose graph representations have proven very successful for ...
The evolution of U.S. commercial domestic aircraft operations from 1991 to 2010
(Massachusetts Institute of Technology, 2012)
The main objective of this thesis is to explore the evolution of U.S. commercial domestic aircraft operations from 1991 to 2010 and describe the implications for future U.S. commercial domestic fleets. Using data collected ...
Optomechanical and wavelength alignments of CubeSat laser communication Systems
(Massachusetts Institute of Technology, 2017)
While the introduction of CubeSats has enabled the scientific, commercial, and governmental communities to launch space missions more quickly at lower costs, the communication subsystems of the platform are limited by a ...
Characterization of fluorohydrogenated ionic liquids for use in the ion electrospray propulsion system
(Massachusetts Institute of Technology, 2018)
This thesis investigates the use of two fluorohydrogenated ionic liquids as propellants for the ion Electrospray Propulsion System developed at MIT, 1-ethyl-3-methylimidazolium fluorohydrogenate and trimethylsulfonium ...
Materials for small-scale space propulsion systems
(Massachusetts Institute of Technology, 2017)
This thesis explores a variety of materials and methods for creating emitter arrays for the ion electrospray propulsion system (iEPS), a compact, efficient, and scalable space propulsion system for use in a wide range of ...