Searched for: subject:"trajectories"
(1 - 20 of 56)

Pages

document
Snapper, Eloy (author)
This report presents the results of the graduation thesis from the TU Delft, performed at the Integrated Vehicle Safety department of TNO. The goal of this graduation project is to develop a unified path planning and tracking method for autonomous vehicles in highway driving scenarios, by making use of Artificial Potential Fields (APFs).
master thesis 2018
document
Raipuria, Geetank (author)
An autonomous vehicle should be able to operate amidst numerous other human-driven vehicles, each driving on its own trajectory. To safely navigate in such a dynamic environment, the autonomous vehicle should be able to predict trajectories of the vehicles operating in its vicinity and use these to plan its own path. Most related work uses a...
master thesis 2017
document
Emmanouil, Antonis (author)
Sediment nourishments have become an attractive alternative to hard measures in counteracting long-term river bed degradation. Due to the large degree of uncertainty concerning mixed sediment morphodynamics, river authorities conduct field studies to collect data that will help in the calibration of morphological models, eventually used to...
master thesis 2017
document
Carzana, Livio (author)
When sunlight illuminates a body, a tiny pressure is exerted upon its surface due to the photons impacting on it. Such a principle forms the basis of solar sailing, in which the solar radiation pressure is used to accelerate highly reflective lightweight structures called solar sails. Similarly, a laser-enhanced solar sail is a solar sail in...
master thesis 2017
document
Cruz Chambel de Aguiar, Gonçalo (author)
The phenomenon by which a spacecraft can both approach a celestial body and start performing revolutions around it, without needing to manoeuvre in between, is known as ballistic capture. For ballistic capture to take place, the spacecraft must be under the gravitational influence of at least 2 celestial bodies. Therefore, it is possible to...
master thesis 2017
document
Stolwijk, Gregorius (author)
A Hybrid Optimal Control (HOC) framework which can be used in conjunction with existing optimal control software is presented. By using hybrid optimal control theory, trajectory optimization problems for systems that are both discrete time and continuous time from a mathematical perspective can be solved. A case study on multi-aircraft formation...
master thesis 2017
document
Wang, Siying (author)
UAVs(Unmanned Aerial Vehicles) have gained popularity in various fields, and many applications require the drones to perform tasks in indoor environments. One major challenge in UAV indoor guidance is the absence of accurate GPS(Global Positioning System)
signals. In this work, a novel guidance method is investigated which uses a library of...
master thesis 2017
document
Spillenaar Bilgen, Jesper (author)
The main goal of any launch vehicle is to bring as much payload to space as possible. Space planes have been studied for decades, as they are thought to be more cost effective for frequent access to space than traditional expendable launchers. This research aims at optimizing the payload capacity of a single stage to orbit (SSTO) horizontal take...
master thesis 2017
document
Greco, Cristian (author)
Electric low-thrust propulsion has nowadays found wide application in space dynamics as it entails considerable savings in spacecraft propellant mass, thanks to the very high specific impulse that this kind of engine is able to generate. However, continuous thrust opens new extensive sets of feasible trajectories, and optimization algorithms are...
master thesis 2017
document
Di Campli Bayard de Volo, Giuseppe (author)
Given the current technological limitations, launch missions are extremely costly: rockets are huge, being about 100 times more massive than the payload, and most of the times expendable. The specific cost required to place a spacecraft in LEO is between 10 and 25 k€/kg. Consequently, trajectory optimization plays a major role in the design of a...
master thesis 2017
document
Galletti, Elena (author)
The increasing interest in solar electric propulsion techniques, that enable significant propellant mass savings for a wide class of transfers, has brought about a revolution in the approach to trajectory design and optimization, as a result of the complexity and diversity of the problem. To date, solutions of different nature exist, but...
master thesis 2017
document
Aragay I Verdeny, Monica (author)
The search for life in other celestial bodies has always been a topic of great interest within the scientific community. The curiosity to know if we are the only ones in the universe or not has driven the development of many engineering projects. This Master Thesis is meant to do its bit in this research field. Europa, a moon of Jupiter, is...
master thesis 2017
document
Zhou, Bingyu (author)
Autonomous driving is one of the popular and advanced research fields aiming to reduce the mortality rate and improve the welfare and efficiency of commuters' lives. As one of the important research branches of self-driving cars, this thesis focuses on the motion planning problems in dynamic and uncertain environments. The challenge of motion...
master thesis 2017
document
Vroom, Aram (author)
Over the past years, numerous missions for spacecraft with low-thrust propulsion have been planned to include large orbital plane changes. In order efficiently generate and evaluate orbits for such missions, use can be made of the spherical shaping method proposed by Novak. When inclinations larger than 15 degrees are present however, the error...
master thesis 2017
document
Jimenez-Lluva, David (author)
Electric Propulsion (EP) has become one of the most efficient technologies for spacecraft propulsion. In contrast to conventional chemical propulsion, the low thrust force generated by EP thrusters can deliver a momentum transfer to the spacecraft that is up to twenty times greater, for an equivalent propellant expenditure. Despite decades of...
master thesis 2017
document
Van den Broeck, Michael (author)
The use of Taylor Series Integration (TSI) for the propagation of spacecraft trajectories and its combination with the relatively unknown Unified State Model (USM) coordinate system, resulting in the TSI-USM propagator, is known to allow fast propagation of interplanetary low-thrust trajectories. Unfortunately, the TSI-USM propagator is a...
master thesis 2017
document
Staats, Bart (author)
Navigation from a room inside a building to another room inside a building which is across the street consists of three parts: first, the indoor part at the building where you start your journey. Secondly, the outdoor part and thirdly, another indoor part inside the building of destination. As regards to the outdoor environment, a navigation aid...
master thesis 2017
document
Mus, D.A. (author)
In order to interact with environments and appliances made for humans, robots should be able to manipulate a large variety of objects and appliances in human environments. When having experience with manipulating a certain object or appliance, a robot should be able to generalize this behaviour to novel, but similar objects and appliances. When...
master thesis 2017
document
González Puerta, A. (author)
The role of traditional entry guidance systems is to ensure that the vehicle is brought from a nominal entry interface point (EIP) to the neighborhood of a designated landing site at an acceptable energy state. Such systems are designed in such a way that the landing site can be safely reached even if off-nominal conditions are present at the...
master thesis 2017
document
Geijselaers, L.H. (author)
With the growth of the air traffic movements and the population of people living around airports, the number of awakenings due to aircraft noise has increased. ICAO has defined four research fields to reduce noise and one of them is implementation of noise abatement operational procedures. This includes different trajectory optimization methods,...
master thesis 2017
Searched for: subject:"trajectories"
(1 - 20 of 56)

Pages