Searched for: subject%3A%22Space%255C+Missions%22
(1 - 15 of 15)
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Bolscher, Thijs (author)
As the Moon reemerges as a renewed fronteer in space exploration, the Lunar Zebro project proposes to deploy a swarm of miniature rovers for efficient lunar surface exploration. One of their goals is to leverage recent advancements in deep learning and AI-accelerating hardware, in conjunction with Commercial Off-The-Shelf technologies and the...
master thesis 2024
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Goldman, Thomas (author)
This thesis proposes an unsupervised Physics-Informed Neural Network (PINN) for solving optimal control problems with the direct method to design and optimize transfer trajectories. The network adheres analytically to boundary conditions and includes the objective fitness as regularization in its loss function. A test scenario of a planar Earth...
master thesis 2023
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Verkammen, Marnix (author)
With a continuously growing number of satellites in orbit, it becomes increasingly important to assess their impacts on the Earth's environment in a standardised manner. While interest in Life Cycle Assessment (LCA) for space missions has gained in strength in the past few years – particularly in Europe – no consensus has yet been reached on a...
master thesis 2023
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Gill, E.K.A. (author), Morton, Jade (author), Axelrad, Penina (author), Akos, Dennis M. (author), Centrella, M. (author), Speretta, S. (author)
Spaceborne Global Navigation Satellite Systems (GNSS) receivers have become ubiquitous sensors for spacecraft navigation, especially in Low Earth Orbits (LEOs), often also supporting science endeavors or as acting dedicated science payloads. Due to the large number of space-capable GNSS receiver models available, spacecraft designers, as well as...
journal article 2023
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Andrade Castanheira, Francisco (author)
The optimization of interplanetary, low-­thrust trajectories is a computationally expensive aspect of preliminary mission design. To reduce the computational burden associated with it, surrogate models can be used as cheap approximations of the original fitness function. Training the surrogate models in a fully online manner can be done to...
master thesis 2022
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Gedik, E. (author), Olenick, Jeffrey (author), Chang, Chu-Hsiang (author), Kozlowski, Steve W.J. (author), Hung, H.S. (author)
Space exploration is evolving with the recent increase in interest and investment. For the success of planned long-duration crewed missions, good interpersonal interactions between crew members are crucial. In this study, we evaluate the use of wearables for detection and estimation of the quality of each social interaction participants have...
journal article 2022
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Touboul, Pierre (author), Métris, Gilles (author), Rodrigues, Manuel (author), Bergé, Joel (author), Robert, Alain (author), Baghi, Quentin (author), André, Yves (author), Bedouet, Judicael (author), Visser, P.N.A.M. (author)
The space mission MICROSCOPE dedicated to the test of the equivalence principle (EP) operated from April 25, 2016 until the deactivation of the satellite on October 16, 2018. In this analysis we compare the free-fall accelerations (a <sub>A</sub> and a <sub>B</sub>) of two test masses in terms of the Eötvös parameter η ( A,B ) = 2 a A − a B a...
journal article 2022
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Zhang, Fan (author), Zhou, He (author), Huang, Panfeng (author), Guo, J. (author)
The tethered formation system has been widely studied due to its extensive use in aerospace engineering, such as Earth observation, orbital location, and deep space exploration. The deployment of such a multitethered system is a problem because of the oscillations and complex formation maintenance caused by the space tether's elasticity and...
journal article 2021
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Dominguez Calabuig, Guillermo Joaquin (author)
Space safety and hazards reduction techniques are each day becoming more important in the design and operation of space transportation vehicles. One way to mitigate risks is to use advanced guidance strategies to centralise mission planning and guidance-navigation and control. Successive convexification is a technique suitable for this purpose...
master thesis 2020
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Stubbig, Leon (author)
Building on recent advances in the fields of low-thrust trajectory optimization based on shaping methods, Artificial Neural Networks, and surrogate models in Evolutionary Algorithms, an investigation into a novel optimization routine is conducted. A flexible Python tool to evaluate linked trajectories in a two-body model based on the hodographic...
master thesis 2019
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Gutierrez Ahumada, Jose Angel (author)
Ballistic capture is a relatively novel concept in interplanetary mission design with the potential to make Mars and other targets in the Solar System more accessible. A complete end-to-end interplanetary mission from an Earth-bound orbit to a stable science orbit around Mars (in this case, an areostationary orbit) has been conducted using this...
master thesis 2019
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Hodge, David (author)
Asteroids, or more formally, Small Solar System Bodies, offer a wealth of scientific knowledge and, increasingly, economic potential. Regrettably, because of their small size and the fact that the largest groups of asteroids in the solar system are situated tens of millions of kilometers from Earth, ground based observations yield limited data,...
master thesis 2018
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Djordjevski, D. (author)
The success of CubeSat, after 2005, resulted in bright future expectations of Spacecraft with a mass below one kilogram. Although these spacecraft are usually known as Pico and FemtoSat, their ambiguous nature and inconsistent use in literature resulted in the use of an alternative, namely Sub One Kilogram Spacecraft, or simply said SOKS....
master thesis 2017
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Baggerman, J.W. (author)
For manned missions to Mars, one of the challenges is to maintain safety in the complex and dynamic space environment. Communication to Mars will suffer from significant delays, potentially endangering a mission if assistance is needed immediately; therefore a high level of independence from ground control is necessary to be able to cope with...
master thesis 2015
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Leloux, J. (author)
The steadily growing amount of orbital debris increases the probability and amount of collisions between two objects in orbit about the Earth. These collisions in turn create even more debris, and it is therefore important to keep track of future conjunctions. The U.S. Space Surveillance Network (SSN) uses ground- and space-based sensors to...
master thesis 2012
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