Searched for: subject:"Trajectory"
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Loosveld, Erik (author)
Due to recent advancements in automated driving systems, drivers are able to withdraw themselves from the control loop of the vehicle in certain driving situations. However, system limits occur relatively frequently, which results in the driver having to take back control. It is argued most currently used take-over quality quantification methods...
master thesis 2019
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Willaert, Dennis (author)
To accommodate the fast growing air traffic in a safe and efficient way, an ATM paradigm shift from current Time Based Operations towards Trajectory Based Operations (TBO) is envisioned. TBO entails the exchange, maintenance and use of consistent 4D trajectory information for collaborative decision-making on the flight. This thesis addresses a...
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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van Hoorn, Martijn (author)
To increase performance of air-to-air missile guidance, a novel guidance law is developed using reinforcement learning methods. This guidance law is based on behavior obtained from optimal control methods and subsequently aims to approximate its performance. The study compares the developed guidance law to a traditional guidance law and optimal...
master thesis 2019
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Fernandez Mora, Alvaro (author)
The development of solar-sail technology in combination with the rising interest in a mission to the Sun-Earth L5 region for heliophysics and the search for Trojan asteroids, raises the question of using solar sailing as the primary propulsion method to enable such a mission. This study therefore investigates different invariant objects and...
master thesis 2019
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Krishnan, Ananthakrishnan (author)
Comets, the sporadic visitors from the outer edges of the Solar System, are considered to hold the key for understanding the formation of planets and the origin of life on Earth. Having spent the majority of time away from the radiative environment of the inner Solar System, the chemistry of the comets has remained unaltered, making them the...
master thesis 2018
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Gianolio, Alessandro (author)
The feasibility of improving the Earth collision uncertainty knowledge of a potentially Earth impacting asteroid by means of a multi-flyby mission has been researched in this thesis. The feasibility is assessed both from an astrodynamics point of view and from a systems engineering point of view. The astrodynamics part provides knowledge...
master thesis 2018
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Floor, Boaz (author)
Motion planning for Autonomous Ground Vehicles (AGVs) in dynamic environments is an extensively studied and complex problem. State of the art methods provide approximate solutions that make conservative assumptions to provide safety and feasibility. We aim to outperform current methods by following a trajectory optimization-based approach,...
master thesis 2018
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Blom, Martijn (author)
In order to reduce the climate impact induced by the aircraft industry, the variability between cost optimized and climate optimized flight trajectories was evaluated. This was done to establish how the climate impact reduction affects the operating costs and vice versa. To evaluate the climate impact of air traffic, a climate-chemistry model...
master thesis 2018
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Riegman, Rick (author)
With the current and expected growth of air traffic, the need for increased support for air traffic controllers from automation continues to grow. One method of improving air traffic management applies 4D trajectory management to control traffic in real-time. An interface applying this method only allowed for manipulation of trajectory in three...
master thesis 2018
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van den Oever, Tom (author)
This thesis presents the design of solar-sail transfer trajectories to a constellation of two spacecraft in displaced vertical Lyapunov orbits at the L2 point of the Earth-Moon system. The constellation provides continuous coverage of the Aitken basin and the lunar South Pole. Initial guesses for the transfers are generated using reverse time...
master thesis 2018
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Richa, Eduardo (author)
The detection of unusual behavior plays a crucial role in the prevention of illegal and harmful activities such as smuggling, piracy, arms trading, human trafficking and illegal immigration. Also for military applications, it is useful to detect anomalous behavior to provide an alert for potential threats, especially with the more recent...
master thesis 2018
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Smits, Tommy (author)
master thesis 2018
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Radhakrishnan, Kaushik (author)
In the year 2050, global anthropogenic radiative forcing from aircraft emissions are projected to increase significantly. Recent studies have considered climate optimized flight trajectories to be a promising measure to mitigate non-CO2 emissions’ environmental impact, which is highly sensitive to locus and time of emissions. Estimating the...
master thesis 2018
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Saß, Konstantin (author)
Tilt-rotor aircraft combine the helicopter’s benefit of VTOL capability and the flight performance that turboprops possess on range, speed and endurance. Tilt-rotor aircraft have the potential to decrease airport congestion and average flight delay in passenger transportation, while benefits are numerous in i.e. search and rescue, disaster...
master thesis 2018
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Geers, Matthijs (author)
The automation of replanting seedlings into bigger trays (transplanting) has been a major industrialisation step in the horticultural sector. Modern machines are abundant in large companies and are quite effective, but they are very expensive both in purchase and maintenance. With major clients taking these costs for granted, designers have not...
master thesis 2018
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Pronk, Anne (author)
Measurements in the frequency range below 30 MHz, key to a better understanding of the origins of our universe, are one of the last unexplored areas of radio astronomy. Low frequency measurements suffer greatly from disturbance from man-made signals. Therefore, satellite missions are proposed which use the Moon as a shield from these...
master thesis 2018
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Jürisson, Andres (author)
Aircraft lifespan can be extended by upgrading and modernizing the electrical subsystems and instruments. However, this often introduces increased power demands and heat generation that the aircraft was not originally designed for and can result in a reduced flight performance and increased wear. Netherlands Aerospace Centre (NLR) and the...
master thesis 2018
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Perdeck, Matthias (author)
In interplanetary space missions, it is convenient to have a second departure opportunity in case the first is missed. Two distinct approaches to minimizing the maximum of the two Delta-V budgets of such a trajectory pair, are developed. The first (‘a priori’) approach optimizes the variables of both trajectories at once. The second (‘a...
master thesis 2018
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Al Jawahiri, Amir (author)
Trajectory generators are designed to create reference paths that are parametrized by time as well as by velocity or acceleration. In the literature, it has been noted that often path planners are the last step in the planning module of autonomous truck-trailer vehicles, which results in a collision-free track. A trajectory generator can improve...
master thesis 2018
Searched for: subject:"Trajectory"
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