Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 180 for “"thrusters"”.
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Precision stationkeeping with azimuthing thrusters
… calculations by the assumption that the rotating thrusters are always parallel thus making the system holonomic. The scheme accommodates for limitations in actuator outputs, including rotation limits and time-lagged thrusts and was implemented in a MATLAB simulation that tested its response to …
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Multifluid nonequilibrium simulation of arcjet thrusters
Thesis (Sc. D.)--Massachusetts Institute of Technology, Dept. of Aeronautics and Astronautics, 1994.
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Dynamic performance of small diameter tunnel thrusters.
… the step input. It is conjectured that such thrusters will enhance vehicle stability.
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Exploration of Planetary Bodies with Electrospray Thrusters
… for continued development of electrospray thrusters. In addition, the use of electrospray thrusters during operations around or on an asteroid can have further implications. First, the low thrust density of electrospray propulsion, relative to monopropellant or cold-gas propulsion, likely …
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Advances in electroaerodynamic thrusters for aircraft propulsion
… has no moving parts, and is nearly silent. EAD thrusters produce ions from atmospheric air and accelerate the ions across two electrodes separated by an air gap: collisions of ions with neutral molecules result in momentum transfer to the neutral air, generating an ionic wind and a thrust force. …
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Silicon wafer integration of ion electrospray thrusters
… and high specific impulse, electrospray thrusters provide a unique solution to the problem of active control in the burgeoning field of miniature satellites. With the potential of distributed systems and low cost functionality currently being realized through development of increasingly …
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Simplified modeling and analysis of arcjet thrusters
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Aeronautics and Astronautics, 1993.
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Transient antenna-plasma interaction in inductive plasma thrusters
… under consideration, inductive plasma thrusters are a promising candidate due to their high thrust density and proven propellant flexibility. In contrast with conventional space propulsion technologies, inductive coupling can deliver energy to a propellant without direct contact, making …
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Fully-kinetic PIC simulations for Hall-effect thrusters
In recent years, many groups have numerically modeled the near-anode region of a Hall thruster in attempts to better understand the associated physics of thruster operation. Originally, simulations assumed a continuum approximation for electrons and used magnetohydrodynamic fluid equations to model …
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Transient one dimensional numerical simulation of magenetoplasmadynamic thrusters
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Aeronautics and Astronautics, 1989.
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Transient one dimensional numerical simulation of Hall thrusters
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Aeronautics and Astronautics, 1993.
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Investigation of Magnetic Field Profile Effects in Hall Thrusters
<p>The purpose of this study was to show the relationship of different magnetic field profiles to the acceleration region length of a Hall thruster. The general transport equations were simplified and solved using a one-dimensional analysis. Some of the model assumptions include quasineutrality, …
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Semi-analytical model of ionization oscillations in Hall thrusters
… the breathing-mode oscillation within Hall thrusters. These oscillations have been present and accepted within Hall thrusters for decades, but recent interest in the oscillation has occurred partly due to a possible connection between wall erosion and the oscillations. The first part of this …
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A theoretical study on alkali seeding of arcjet thrusters
Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Aeronautics and Astronautics, 1998.
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Optimizing wettability of externally wetted microfabricated silicon electrospray thrusters
… The design of microfabricated silicon thrusters and their feed systems requires an understanding of propellant flow over a silicon surface. This research explores the parameters that affect wettability of externally wetted microfabricated silicon electrospray thruster arrays and how …
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A hybridized discontinuous Galerkin formulation for modeling electrohydrodynamic thrusters
Electrohydrodynamic (EHD) thrusters utilize ion neutral collisions in air to produce a propulsive force. The ions are generated at an emitting electrode in an asymmetric capacitor by a corona discharge. This thesis presents a Hybridized Discontinuous Galerkin (HDG) formulation for solving the EHD …
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Onset in magnetoplasmadynamic thrusters : a model of an electrothermal instability
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Aeronautics and Astronautics, 1990.
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Two-dimensional hybrid particle-in-cell modeling of Hall thrusters
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Aeronautics and Astronautics, 1995.
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