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 75 for “"low-thrust"”.
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Guidance of low-thrust interplanetary vehicles
Thesis: Sc. D., Massachusetts Institute of Technology, Department of Aeronautics and Astronautics, 1964
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Designing low thrust missions in cislunar space
Submission original under an indefinite embargo labeled 'Open Access'. The submission was exported from vireo on 2024-03-01 without embargo terms
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LOW-THRUST CONTROLLER FOR SLOT-BASED SATELLITE CONSTELLATIONS
… operating in near-circular orbits with low-thrust engines. This is done using a linearized model of the dynamics under the Earth gravitational potential and the atmospheric drag.
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Continuous Low-Thrust Trajectory Optimization: Techniques and Applications
… mission feasibility during mission design. High-thrust trajectory optimization problems are typically formulated as discrete optimization problems and are numerically well-behaved. Low-thrust systems, on the other hand, operate for significant periods of the mission time. As a result, the …
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High-fidelity low-thrust trajectory optimization to the lunar gateway
Submission original under an indefinite embargo labeled 'Open Access'. The submission was exported from vireo on 2023-09-01 without embargo terms
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Small-Body and Heliophysics Missions using Hybrid Low-Thrust Propulsion
… the earliest chemical engines to modern electric thrusters, require propellant, thereby reducing the mass budget available for a payload. By harnessing the momentum of reflected photons of sunlight, solar sails offer a propellant-free alternative but are limited by attitude restrictions and their …
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Cost and technology assessment of low thrust orbital transfer vehicles
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Aeronautics and Astronautics, 1994.
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Low-thrust Spacecraft guidance and control using proximal policy optimization
… Proximal Policy Optimization (PPO) for solving low-thrust spacecraft guidance and control problems. First, an agent is trained to complete a 302 day mass-optimal low-thrust transfer between the Earth and Mars. This is accomplished while only providing the agent with information regarding its own …
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Formation of RAAN-Spread CubeSat Constellations Utilizing Onboard Low-Thrust Propulsion
… occur within a timeframe and distance that allows for adequate capture of the horizontal wave vector. Receivers used in radio occultation have been successfully used on CubeSats. A CubeSat constellation of satellites in the same orbital plane with varying right ascension of the ascending node …
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Trajectory and guidance theory for a low-thrust lunar reconnaissance vehicle
Thesis (Sc. D.)--Massachusetts Institute of Technology, Dept. of Aeronautics and Astronautics, 1961.
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Analytical methods for satellite constellation reconfiguration and reconnaissance using low-thrust manoeuvres
… general perturbation solution to a restricted low-thrust circular to circular Lambert rendezvous problem with tangential thrust and an optional coast arc is developed. The solution requires no iteration and is solved rapidly to generate a full range of possible manoeuvres to achieve the desired …
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Low thrust augmented periodic orbits in the two- and three-body problems
Continuous low thrust propulsion can add considerable utility to spacecraft dynamics by enabling rich new families of thrust augmented orbits. With the aim of enabling such orbits for small, low-cost spacecraft with limited on-board sensing, new families of non-Keplerian orbits are generated in the …
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Hybrid-optimization scheme for low-thrust trajectory design to the lunar gateway
Submission published under a 24 month embargo labeled 'U of I Access', the embargo will last until 2025-12-01
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Development of low-thrust solid rocket motors for small, fast aircraft propulsion
… but must be re-engineered to operate at much lower thrust and for much longer burn times than conventional small solid rocket motors. This imposes unique demands on the motor and propellant. This work investigates technological challenges of small, low-thrust solid rocket motors: slow-burn …
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Automated planetary satellite tour planning with a novel low-thrust direct transcription method
… designers have started to consider the use of low-thrust electric propulsion systems on board the spacecraft to enable future tours. The optimal trajectory for a given mission profile using low-thrust may be highly non-intuitive. There are thus many challenging aspects to the design of multiple …
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Novel methods for high-fidelity low-thrust spacecraft trajectory optimization and mission design
Submission original under an indefinite embargo labeled 'Open Access'. The submission was exported from vireo on 2025-10-20 without embargo terms
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Design of low-thrust missions to asteroids with analysis of the missed-thrust problem
… system and an initial mass in LEO of 289 Mg. For low-thrust sample return missions to the main belt asteroid Kleopatra, Mars and Earth are useful gravity assist bodies, with payload masses of 950-1150 kg possible using a 20 kW solar electric propulsion system. A mission to the Jupiter Trojan …
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Lyapunov feedback control in equinoctial elements applied to low thrust control of elliptical orbit constellations
… Elliptic-inclined constellations have been flown since the 1960s, chiefly by the governments of the former Soviet Union and the current Russian Federation. Not until the year 2000 has such a constellation been flown commercially.
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