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Dissertations / Theses on the topic 'Orbital and aerial sensors'

Author: Grafiati

Published: 4 June 2021

Last updated: 14 February 2022

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1

Justo, Ana Paula. "Sistemas orbitais e a?reos aplicados ? an?lise multi-escala da tect?nica r?ptil atuante na borda sudeste da Bacia do Parna?ba." Universidade Federal do Rio Grande do Norte, 2006. http://repositorio.ufrn.br:8080/jspui/handle/123456789/18838.

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Made available in DSpace on 2015-03-13T17:08:39Z (GMT). No. of bitstreams: 1 AnaPJ_ate_cap4.pdf: 5254385 bytes, checksum: 3ac040e5f9ad13d1d9fc82f32f2f0abf (MD5) Previous issue date: 2006-08-25<br>Coordena??o de Aperfei?oamento de Pessoal de N?vel Superior<br>The tectonics activity on the southern border of Parna?ba Basin resulted in a wide range of brittle structures that affect siliciclastic sedimentary rocks. This tectonic activity and related faults, joints, and folds are poorly known. The main aims of this study were (1) to identify lineaments using several remotesensing systems, (2)

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2

Trowbridge, Michael Aaron. "Autonomous 3D Model Generation of Orbital Debris using Point Cloud Sensors." Thesis, University of Colorado at Boulder, 2014. http://pqdtopen.proquest.com/#viewpdf?dispub=1558774.

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<p> A software prototype for autonomous 3D scanning of uncooperatively rotating orbital debris using a point cloud sensor is designed and tested. The software successfully generated 3D models under conditions that simulate some on-orbit orbit challenges including relative motion between observer and target, inconsistent target visibility and a target with more than one plane of symmetry. The model scanning software performed well against an irregular object with one plane of symmetry but was weak against objects with 2 planes of symmetry. </p><p> The suitability of point cloud sensors and al

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3

Mathisen, Siri Holthe. "High Precision Deployment of Wireless Sensors from Unmanned Aerial Vehicles." Thesis, Norges teknisk-naturvitenskapelige universitet, Institutt for teknisk kybernetikk, 2014. http://urn.kb.se/resolve?urn=urn:nbn:no:ntnu:diva-25541.

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AMOS - Centre for Autonomous Marine Operations and Systems - is a research center at the Norwegian University of Science and Technology. One out of the 9 projects in AMOS researches how basic unmanned aerial vehicle (UAV) operations can be performed, and one of these operations is high precision deployment of a payload from a UAV. UAVs are normally used for tasks that are either too dangerous, too inaccessible or too repetitive for humans. These tasks may include sensors to be placed somewhere inaccessible or first aid equipment to be delivered to disaster areas.This Master Thesis describes th

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4

Cannon, Brandon Jeffrey. "Fault Detection for Unmanned Aerial Vehicles with Non-Redundant Sensors." BYU ScholarsArchive, 2014. https://scholarsarchive.byu.edu/etd/5308.

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To operate, autonomous systems of necessity employ a variety of sensors to perceive their environment. Many small unmanned aerial vehicles (UAV) are unable to carry redundant sensors due to size, weight, and power (SWaP) constraints. Faults in these sensors can cause undesired behavior, including system instability. Thus, detection of faults in these non-redundant sensors is of paramount importance.The problem of detecting sensor faults in non-redundant sensors on board autonomous aircraft is non-trivial. Factors that make development of a solution difficult include both an inability to per

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5

Sharkasi, Adam Tawfik. "Stereo Vision Based Aerial Mapping Using GPS and Inertial Sensors." Thesis, Virginia Tech, 2008. http://hdl.handle.net/10919/32263.

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The robotics field has grown in recent years to a point where unmanned systems are no longer limited by their capabilities. As such, the mission profiles for unmanned systems are becoming more and more complicated, and a demand has risen for the deployment of unmanned systems into the most complex of environments. Additionally, the objectives for unmanned systems are once more complicated by the necessity for beyond line of sight teleoperation, and in some cases complete vehicle autonomy. Such systems require adequate sensory devices for appropriate situational awareness. Additionally, a larg

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6

Sjanic, Zoran. "Navigation and Mapping for Aerial Vehicles Based on Inertial and Imaging Sensors." Doctoral thesis, Linköpings universitet, Tekniska högskolan, 2013. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-97317.

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Small and medium sized Unmanned Aerial Vehicles (UAV) are today used in military missions, and will in the future find many new application areas such as surveillance for exploration and security. To enable all these foreseen applications, the UAV's have to be cheap and of low weight, which restrict the sensors that can be used for navigation and surveillance. This thesis investigates several aspects of how fusion of navigation and imaging sensors can improve both tasks at a level that would require much more expensive sensors with the traditional approach of separating the navigation system f

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7

Strömberg, Erik. "Smoothing and Mapping of an Unmanned Aerial Vehicle Using Ultra-wideband Sensors." Thesis, KTH, Reglerteknik, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-215636.

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Unmanned Aerial Vehicles (UAV), in particular the four-rotor quadrotor, aregaining wide popularity in research as well as in commercial and hobbyist applications.Maneuvrability, low cost, and small size make quadrotors an attractiveoption to full-scale, manned helicopters while opening up new possibilities.These include applications where full-scale helicopters are unsuitable, such ascooperative tasks or operating indoors.Many UAV systems use the Global Positioning System (GPS), IMU (InertialMeasurement Unit) sensors, and camera sensors to observe the UAV’sstate. Depending on the application,

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8

Trittler, Martin [Verfasser]. "Automatic Landing for Fixed-Wing Unmanned Aerial Vehicles with Optical Sensors / Martin Trittler." Aachen : Shaker, 2018. http://d-nb.info/1162794321/34.

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9

Rapp, Carl. "Unmanned Aerial Vehicle Positioning Using a Phased Array Radio and GNSS Independent Sensors." Thesis, Linköpings universitet, Reglerteknik, 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-157414.

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This thesis studies the possibility to replace the global navigation satellite system (GNSS) with a phased array radio system (PARS) for positioning and navigation of an unmanned aerial vehicle (UAV). With the increase of UAVs in both civilian and military applications, the need for a robust and accurate navigation solution has increased. The GNSS is the main solution of today for UAV navigation and positioning. However, the GNSS can be disturbed by malicious sources, the signal can either be blocked by jamming or modified to give the wrong position by spoofing. Studies have been conducted to

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10

De, Villiers Hendrik Barney. "Correlation and tracking using multiple radar sensors /." Link to the online version, 2006. http://hdl.handle.net/10019/1006.

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11

Bowers, Roshawn Elizabeth. "Estimation algorithm for autonomous aerial refueling using a vision based relative navigation system." Texas A&M University, 2005. http://hdl.handle.net/1969.1/2700.

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A new impetus to develop autonomous aerial refueling has arisen out of the growing demand to expand the capabilities of unmanned aerial vehicles (UAVs). With autonomous aerial refueling, UAVs can retain the advantages of being small, inexpensive, and expendable, while offering superior range and loiter-time capabilities. VisNav, a vision based sensor, offers the accuracy and reliability needed in order to provide relative navigation information for autonomous probe and drogue aerial refueling for UAVs. This thesis develops a Kalman filter to be used in combination with the VisNav sensor to imp

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12

Archontakis, Andreas. "Assessing the flight quality of a large UAV for sensors/ground robots aerial delivery." Thesis, Monterey, California. Naval Postgraduate School, 2010. http://hdl.handle.net/10945/5116.

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Approved for public release; distribution is unlimited<br>The new goal for unmanned aerial systems will be to find creative methods of keeping the cost low and still maintain effectiveness. This thesis discusses the importance of UAVs over the last few years, suggests the development of a low-cost, large UAV, and evaluates the results. We also examine the idea of a platform for deploying multiple aerial-delivery, parafoil-based systems and discuss scenarios for the improvement of the collaboration of the large UAV with the Snowflake project.

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13

Clark, Spencer James. "Sensor-Driven Hierarchical Path Planning for Unmanned Aerial Vehicles Using Canonical Tasks and Sensors." BYU ScholarsArchive, 2013. https://scholarsarchive.byu.edu/etd/3798.

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Unmanned Aerial Vehicles (UAVs) are increasingly becoming economical platforms for carrying a variety of sensors. Building flight plans that place sensors properly, temporally and spatially, is difficult. The goal of sensor-driven planning is to automatically generate flight plans based on desired sensor placement and temporal constraints. We propose a simple taxonomy of UAV-enabled sensors, identify a set of generic sensor tasks, and argue that many real-world tasks can be represented by the taxonomy. We present a hierarchical sensor-driven flight planning system capable of generating 2D flig

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14

Polen, Melissa Adrienne. "ANC of UAS Rotor Noise using Virtual Error Sensors." Thesis, Virginia Tech, 2021. http://hdl.handle.net/10919/102681.

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Traditional active noise control (ANC) systems rely on a physical sensor to measure the error signal at the desired location of attenuation. The error signal is then used to update an adaptive controller, which ultimately attenuates the measured response. However, it is not always practical to use traditional ANC in real-world applications. For example, as small unmanned aerial systems (UAS) become more commonly used, community noise exposure also increases, along with the desire to reduce UAS noise. Traditional ANC systems that rely on physical sensors at observer locations are impractical, s

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15

Rubio, Manuel Sánchez, Rafael G. Armengod, Luis de-Marcos, and José-Javier Martinez. "Contributions to Data Postprocessing in Sending Samples Parameters at Critical Moments on Unmanned Aerial." International Foundation for Telemetering, 2011. http://hdl.handle.net/10150/595674.

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ITC/USA 2011 Conference Proceedings / The Forty-Seventh Annual International Telemetering Conference and Technical Exhibition / October 24-27, 2011 / Bally's Las Vegas, Las Vegas, Nevada<br>In this paper we investigate the different stages that allow us to create a model that would provide a better understanding of what happens on certain parameters that measure physical quantities related to the behavior of both, burst and reaction, unmanned aircraft as well as unmanned helicopters based on a data transmission to land via radio modem.

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16

Persson, Martin. "Semantic Mapping using Virtual Sensors and Fusion of Aerial Images with Sensor Data from a Ground Vehicle." Doctoral thesis, Örebro : Örebro University, 2008. http://urn.kb.se/resolve?urn=urn:nbn:se:oru:diva-2186.

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17

Hoffer, Nathan V. "System Identification of a Small Low-Cost Unmanned Aerial Vehicle Using Flight Data from Low-Cost Sensors." DigitalCommons@USU, 2014. https://digitalcommons.usu.edu/etd/4274.

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Remote sensing has traditionally been done with satellites and manned aircraft. While these methods can yield useful scientific data, satellites and manned aircraft have limitations in data frequency, process time, and real time re-tasking. Small low-cost unmanned aerial vehicles (UAVs) provide greater possibilities for personal scientific research than traditional remote sensing platforms. Precision aerial data requires an accurate vehicle dynamics model for controller development, robust flight characteristics, and fault tolerance. One method of developing a model is system identification (s

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18

De, Villiers Hendrik Barney. "Correlation and tracking using multiple radar sensors." Thesis, Stellenbosch : University of Stellenbosch, 2005. http://hdl.handle.net/10019.1/2265.

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Thesis (MScEng (Mathematical Sciences. Applied Mathematics))--University of Stellenbosch, 2005.<br>Tracking manoeuvring military airborne targets with radar is problematic due to the low scan rates and the high levels of measurement noise. Surveillance systems using multiple radars have the benefit of an increased rate of observation and noise reduction but also have the problem of correlating observations from multiple sensors. Mehtods are discussed to correlate single observations from multiple radar sensors as well as assigning observations to existing tracks. Filtering methods to reduce me

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19

Afaneh, Akef. "Computational investigations of the electronic structure of molecular mercury compounds: ion-selective sensors." Springer International Publishing AG, 2012. http://hdl.handle.net/1993/30661.

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This thesis presents the basic concepts of electronic structure theory and the chemical properties of mercury. The theoretical foundation of DFT and the consequences of relativity are also introduced. The electronic structure of Hg(II) ions, [Hg(L)n(H2O)m]q (L = HO-, Cl-, HS-, S2-) has been studied. We show, in this thesis, that the charge transfer (that is calculated from the hard-soft-acid-base principle (Pearson’s principle)), the total NBO charge and the interaction energies are strongly correlated. Our studies indicate the effect of the solvent on the global electrophilicity, the charge t

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20

Chidurala, Manohar. "Dynamic Characteristics of Biologically Inspired Hair Receptors for Unmanned Aerial Vehicles." ScholarWorks@UNO, 2015. http://scholarworks.uno.edu/td/2040.

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The highly optimized performance of nature’s creations and biological assemblies has inspired the development of their engineered counter parts that can potentially outperform conventional systems. In particular, bat wings are populated with air flow hair receptors which feedback the information about airflow over their surfaces for enhanced stability and maneuverability during their flight. The hairs in the bat wing membrane play a role in the maneuverability tasks, especially during low-speed flight. The developments of artificial hair sensors (AHS) are inspired by biological hair cells in a

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21

Fuller, Ryan Michael. "Adaptive Noise Reduction Techniques for Airborne Acoustic Sensors." Wright State University / OhioLINK, 2012. http://rave.ohiolink.edu/etdc/view?acc_num=wright1355361066.

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22

Elliott, Derek J. Matthew G. Thompson. "Comparison of "functional concept of battlespace awareness" versus the concept of "power to the edge," with a focus on integrating shotspotter sensors and anmanned aerial vehicles /." Monterey, Calif. : Springfield, Va. : Naval Postgraduate School ; Available from National Technical Information Service, 2005. http://library.nps.navy.mil/uhtbin/hyperion/05Sep%5FElliott.pdf.

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23

Thompson, Matthew G., and Derek J. Elliott. "Comparison of "functional concept of battlespace awareness" versus the concept of "power to the edge," with a focus on integrating shotspotter sensors and unmanned aerial vehicles." Thesis, Monterey, California. Naval Postgraduate School, 2005. http://hdl.handle.net/10945/2120.

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Current military doctrine is primarily hierarchical in nature with respect to power and authority. The "Functional Concept of Battlespace Awareness" (FCBA) is a military sensor methodology that employs a hierarchical command structure to test emerging technologies. Asymmetric warfare, however, demands a faster and more adaptive warfighting mentality that distributes power and responsibility across more of our forces; particularly those that are at the frontlines of the battlefield. "Power to the Edge" is a warfighting methodology that emphasizes a departure from traditional military hierarchie

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24

Ma, Xiaoyan. "Data collection of mobile sensor networks by drones." Phd thesis, Toulouse, INPT, 2017. http://oatao.univ-toulouse.fr/19492/1/MA_Xiaoyan.pdf.

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Data collection by autonomous mobile sensor arrays can be coupled with the use of drones which provide a low-cost, easily deployable backhauling solution. These means of collection can be used to organize temporary events (sporting or cultural) or to carry out operations in difficult or hostile terrain. The aim of this thesis is to propose effective solutions for communication between both mobile sensors on the ground and on the edge-to-ground link. For this purpose, we are interested in scheduling communications, routing and access control on the sensor / drone link, the mobile collector. We

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25

Hamadi, Hussein. "Fault-tolerant control of a multirotor unmanned aerial vehicle under hardware and software failures." Thesis, Compiègne, 2020. http://www.theses.fr/2020COMP2555.

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Le but de ce travail est de proposer des mécanismes pour les drones multirotors qui permettent d'une part de tolérer des fautes sur le drone, et d'autre part de prendre en compte les effets du vent en extérieur. Les fautes visées comportent des fautes d'actionneurs, de capteurs, mais également des fautes logicielles sur les algorithmes de fusion de données. Dans nos travaux, nous avons développé un contrôleur robuste et un observateur des perturbations extérieures capables de coopérer avec la méthode de reconfiguration des commandes, pour tolérer de façon simultanée les défaillances de moteurs

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Kunzler, Wesley Mont. "Fiber Optic Sensor Interrogation Advancements for Research and Industrial Use." BYU ScholarsArchive, 2011. https://scholarsarchive.byu.edu/etd/2608.

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Spectrally-based fiber optic sensors are a rapidly maturing technology capable of sensing several environmental parameters in environments that are unfitting to electrical sensors. However, the sensor interrogation systems for this type of sensors are not yet fit to replace conventional sensor systems. They lack the speed, compact size, and usability necessary to move into mainstream test and measurement. The Fiber Sensor Integrated Monitor (FSIM) technology leverages rapid optical components and parallel hardware architecture to move these sensors across the research threshold into greater ma

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Delgado, Felipe de Souza. "Redes de período longo em fibras ópticas aplicadas ao sensoriamento de corrente elétrica em Vant’s." Universidade Federal de Juiz de Fora (UFJF), 2017. https://repositorio.ufjf.br/jspui/handle/ufjf/5853.

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Submitted by Renata Lopes (renatasil82@gmail.com) on 2017-10-02T19:31:50Z No. of bitstreams: 1 felipedesouzadelgado.pdf: 2621698 bytes, checksum: f2d2c40acc8fdf80a70c9f39aabc0cc9 (MD5)<br>Approved for entry into archive by Adriana Oliveira (adriana.oliveira@ufjf.edu.br) on 2017-10-09T19:46:37Z (GMT) No. of bitstreams: 1 felipedesouzadelgado.pdf: 2621698 bytes, checksum: f2d2c40acc8fdf80a70c9f39aabc0cc9 (MD5)<br>Made available in DSpace on 2017-10-09T19:46:37Z (GMT). No. of bitstreams: 1 felipedesouzadelgado.pdf: 2621698 bytes, checksum: f2d2c40acc8fdf80a70c9f39aabc0cc9 (MD5) Previous issue d

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28

Sabiron, Guillaume. "Synthèse d’une solution GNC basée sur des capteurs de flux optique bio-inspirés adaptés à la mesure des basses vitesses pour un atterrissage lunaire autonome en douceur." Thesis, Toulouse, ISAE, 2014. http://www.theses.fr/2014ESAE0038/document.

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Dans cette thèse, nous nous intéressons au problème de l’atterrissage lunaire autonome et nous proposons une méthode innovante amenant une alternative à l’utilisation de capteurs classiques qui peuvent se révéler encombrants, énergivores et très onéreux.La première partie est consacrée au développement et à la construction de capteurs de mouvement inspirés de la vision des insectes volants et mesurant le flux optique.Le flux optique correspond à la vitesse angulaire relative de l’environnement mesurée par la rétine d’un agent. Dans un environnement fixe, les mouvements d’un robot génèrent un f

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29

Simões, Daniela Pereira. "Forest monitoring through a hybrid system with networks of aerial drones and sensors." Master's thesis, 2019. http://hdl.handle.net/10773/29468.

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With the technological advances in recent years, the costs of various technologies are decreasing, allowing elements such as aerial drones and sensors to be increasingly accessible, smaller, transportable and also more stable in flight. These developments allow these elements to be used in various areas such as agriculture, surveillance, search and rescue; however, most of the solutions presented require a pilot or require the aerial drone to make a set of decisions that must be predefined before flight. One of the areas where aerial drones can be useful is in monitoring fires and fire

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30

Wang, Jheng-Liang, and 王政良. "Development of a Micro Aerial Robot for Indoor Patrol Applications Based on Low-Cost Sensors." Thesis, 2015. http://ndltd.ncl.edu.tw/handle/72407594341276279817.

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碩士<br>聖約翰科技大學<br>電機工程系碩士班<br>103<br>In this thesis we try to develop indoor exploring techniques for a commercial micro-aerial robot (MAR), mainly focusing on data fusion of low-cost micro-controller board and sensors, such as cameras, inertial sensors, and distance sensors to fulfill navigation algorithms. Especially, proper choices of sensors and allocation of the sensors are crucial to success of indoor exploring strategies. We first use the infrared sensors to measure distances from the MAR to the wall around it. According to the gathered geometrical information of the environment, we appl

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31

(8561289), Austin Riegsecker. "SCANS Framework: Simulation of CUAS Networks and Sensors." Thesis, 2020.

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Counter Unmanned Aerial System (CUAS) security systems have unrealistic performance expectations hyped on marketing and idealistic testing environments. By developing an agent-based model to simulate these systems, an average performance metric can be obtained, thereby providing better representative values of true system performance.<br><br>Due to high cost, excessive risk, and exponentially large parameter possibilities, it is unrealistic to test a CUAS system for optimal performance in the real world. Agent-based simulation can provide the necessary variability at a low cost point and allow

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32

Penedos, Pedro Pais. "Precision Agriculture Using Unmanned Aerial Systems: Mapping Vigor’s Spatial Variability On Low Density Agricultures Using a Canopy Pixel Classification And Interpolation Model." Master's thesis, 2018. http://hdl.handle.net/10362/33277.

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Dissertation submitted in partial fulfilment of the requirements for the degree of Master of Science in Geospatial Technologies<br>It is becoming more present in agriculture’s practices the use of Unmanned Aerial Systems with sensors capable of capturing light, in the visible and in longer wavelengths of the electromagnetic spectrum once reflected on the field. These sensors have been used to perform Remote Sensing also in other knowledge fields, describing phenomenon without the risk, cost and the time consuming processes associated with in site samples collection and analysis by a technician

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