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Dissertations / Theses on the topic 'Distributed Sensing and Control'

Author: Grafiati

Published: 4 June 2021

Last updated: 21 February 2023

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1

Fariborzi, Fariborz. "Distributed sensing and control of a simply supported plate." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1998. http://www.collectionscanada.ca/obj/s4/f2/dsk2/tape17/PQDD_0012/NQ32829.pdf.

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2

Dai, Hanping. "Distributed control system architecture and smart sensing for intelligent semi-autonomous vehicles." Thesis, De Montfort University, 2002. http://hdl.handle.net/2086/4784.

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3

Grocholsky, Ben. "Information-Theoretic Control of Multiple Sensor Platforms." Thesis, The University of Sydney, 2002. http://hdl.handle.net/2123/796.

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This thesis is concerned with the development of a consistent, information-theoretic basis for understanding of coordination and cooperation decentralised multi-sensor multi-platform systems. Autonomous systems composed of multiple sensors and multiple platforms potentially have significant importance in applications such as defence, search and rescue mining or intelligent manufacturing. However, the effective use of multiple autonomous systems requires that an understanding be developed of the mechanisms of coordination and cooperation between component systems in pursuit of a common goal. A

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4

Grocholsky, Ben. "Information-Theoretic Control of Multiple Sensor Platforms." University of Sydney. School of Aerospace, Mechanical and Mechatronic Engineering, 2002. http://hdl.handle.net/2123/796.

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This thesis is concerned with the development of a consistent, information-theoretic basis for understanding of coordination and cooperation decentralised multi-sensor multi-platform systems. Autonomous systems composed of multiple sensors and multiple platforms potentially have significant importance in applications such as defence, search and rescue mining or intelligent manufacturing. However, the effective use of multiple autonomous systems requires that an understanding be developed of the mechanisms of coordination and cooperation between component systems in pursuit of a common goal. A

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5

Van, Den Biggelaar Olivier. "Distributed spectrum sensing and interference management for cognitive radios with low capacity control channels." Doctoral thesis, Universite Libre de Bruxelles, 2012. http://hdl.handle.net/2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/209612.

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Cognitive radios have been proposed as a new technology to counteract the spectrum scarcity issue and increase the spectral efficiency. In cognitive radios, the sparse assigned frequency bands are opened to secondary users, provided that interference induced on the primary licensees is negligible. Cognitive radios are established in two steps: the radios firstly sense the available frequency bands by detecting the presence of primary users and secondly communicate using the bands that have been identified as not in use by the primary users.<p><p>In this thesis we investigate how to improve the

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6

Bassil, Antoine. "Distributed fiber optics sensing for crack monitoring of concrete structures." Thesis, Nantes, 2019. http://www.theses.fr/2019NANT4057.

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Le travail de thèse présenté dans ce mémoire vise à développer et valider une technique de suivi d’ouvertures de fissures à l'aide de mesures réparties de déformation par fibres optiques. Dans un premier temps les différentes théories existantes sur le transfert de déformation du matériau hôte vers la fibre optique sont présentées avec leurs domaine de validité. Le problème de l’adhésion parfaite entre couche est ensuite étudié et un modèle analytique à trois couches tenant compte d’une adhésion imparfaite est élaboré. Ce modèle est ensuite généralisé aux systèmes multicouches. Les études expé

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7

Lion, Stephen Todd. "Control Authorities of a Distributed Actuation and Sensing Array on a Blended-Wing-Body Uninhabited Aerial Vehicle." NCSU, 2007. http://www.lib.ncsu.edu/theses/available/etd-03272007-011124/.

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A distributed actuation array was installed on a blended-wing-body uninhabited aerial vehicle and tested in the 12-foot subsonic wind tunnel at NASA?s Langley Research Center. From the results of these tests, a discussion is given of the baseline aircraft, its conventional control surfaces, and the distributed array. Each effector in the distributed array was tested individually as well as pre-determined configurations incorporating all 12 effectors on each wing. From the tests on the individual effectors, a method was created that allows for the prediction of the control authorities for any c

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8

Suh, Peter M. "Robust modal filtering for control of flexible aircraft." Diss., Georgia Institute of Technology, 2014. http://hdl.handle.net/1853/51780.

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The work in this dissertation comprises aeroservoelastic simulation development, two modal filter design case studies and theoretical improvement of the modal filter. The modal filter is made robust to sensor bias. Studies have shown that the states estimated by the modal filter can be integrated into active structural control. The integration of modal filters into aircraft structural control systems is explored. Modal filters require distributed sensing to achieve accurate modal coordinate estimates. Distributed sensing technology has progressed to the point, where it is being tested on airc

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9

Mazloomzadeh, Ali. "Development of Hardware in the Loop Real-Time Control Techniques for Hybrid Power Systems Involving Distributed Demands and Sustainable Energy Sources." FIU Digital Commons, 2014. http://digitalcommons.fiu.edu/etd/1666.

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The future power grid will effectively utilize renewable energy resources and distributed generation to respond to energy demand while incorporating information technology and communication infrastructure for their optimum operation. This dissertation contributes to the development of real-time techniques, for wide-area monitoring and secure real-time control and operation of hybrid power systems. To handle the increased level of real-time data exchange, this dissertation develops a supervisory control and data acquisition (SCADA) system that is equipped with a state estimation scheme from the

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10

Sundman, Dennis. "Greedy Algorithms for Distributed Compressed Sensing." Doctoral thesis, KTH, Kommunikationsteori, 2014. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-144907.

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Compressed sensing (CS) is a recently invented sub-sampling technique that utilizes sparsity in full signals. Most natural signals possess this sparsity property. From a sub-sampled vector, some CS reconstruction algorithm is used to recover the full signal. One class of reconstruction algorithms is formed by the greedy pursuit, or simply greedy, algorithms, which is popular due to low complexity and good performance. Meanwhile, in sensor networks, sensor nodes monitor natural data for estimation or detection. One application of sensor networking is in cognitive radio networks, where sensor no

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11

Kelly, Devin WW. "A Practical Distributed Spectrum Sensing System." Digital WPI, 2011. https://digitalcommons.wpi.edu/etd-theses/378.

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As the demand for wireless communication systems grows, the need for spectrum grows accordingly. However, a large portion of the usable spectrum has already been exclusively licensed to various entities. This exclusive allocation method encourages spectrum to be left unused if the licensee has no need for that spectrum. In order to better utilize spectrum and formulate new approaches for greater spectrum use efficiency, it is imperative to possess a thorough understanding about how wireless spectrum behaves over time, frequency, and space. In this thesis, a practical, scalable, and low-cos

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12

Feced, Ricardo. "Nonlinear techniques for distributed optical fibre sensing." Thesis, King's College London (University of London), 1998. https://kclpure.kcl.ac.uk/portal/en/theses/nonlinear-techniques-for-distributed-optical-fibre-sensing(48661ada-da47-4da7-b6db-fc995f840603).html.

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13

Dhliwayo, Jabulani. "Stimulated Brillouin scattering for distributed temperature sensing." Thesis, University of Kent, 1997. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.242858.

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14

Frazier, Janay Amber Wright. "High-Definition Raman-based Distributed Temperature Sensing." Thesis, Virginia Tech, 2018. http://hdl.handle.net/10919/95934.

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Distributed Temperature Sensing (DTS) has been used in a variety of different applications. Its ability to detect temperature fluctuations along fiber optic lines that stretch for several kilometers has made it a popular topic in various fields of science, engineering, and technology. From pre-fire detection to ecological monitoring, DTS has taken a vital role in scientific research. DTS uses the principle of backscattering by three different spectral components, e.g., Rayleigh scattering, Brillouin scattering, and Raman scattering. Although there have been various improvements to DTS, its slo

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15

Rawlings, Trevor. "Distributed control architecture." Thesis, Loughborough University, 2009. https://dspace.lboro.ac.uk/2134/6077.

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This document describes the development and testing of a novel Distributed Control Architecture (DCA). The DCA developed during the study is an attempt to turn the components used to construct unmanned vehicles into a network of intelligent devices, connected using standard networking protocols. The architecture exists at both a hardware and software level and provides a communication channel between control modules, actuators and sensors. A single unified mechanism for connecting sensors and actuators to the control software will reduce the technical knowledge required by platform integrators

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16

Iyer, Ranjit. "Probabilistic distributed control." Diss., Restricted to subscribing institutions, 2008. http://proquest.umi.com/pqdweb?did=1568128211&sid=1&Fmt=2&clientId=1564&RQT=309&VName=PQD.

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17

Read, Tom Oliver Trevett. "Applications of distributed temperature sensing in subsurface hydrology." Thesis, University of East Anglia, 2016. https://ueaeprints.uea.ac.uk/59401/.

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In the study of dynamic subsurface processes there is a need to monitor temperature and groundwater fluxes efficiently in both time and space. Distributed Temperature Sensing has recently become more accessible to researchers in Earth Sciences, and allows temperatures to be measured simultaneously, at small intervals, and over large distances along fibre optic cables. The capability of DTS in conjunction with heat injection to detect groundwater fluxes, is assessed in this thesis using a combination of numerical modelling, laboratory tests, and field trials at the Ploemeur research site in Bri

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18

Li, Xiaowei. "A weighted ℓ₁-minimization for distributed compressive sensing". Thesis, University of British Columbia, 2015. http://hdl.handle.net/2429/54836.

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Distributed Compressive Sensing (DCS) studies the recovery of jointly sparse signals. Compared to separate recovery, the joint recovery algorithms in DCS are usually more effective as they make use of the joint sparsity. In this thesis, we study a weighted ℓ₁-minimization algorithm for the joint sparsity model JSM-1 proposed by Baron et al. Our analysis gives a sufficient null space property for the joint sparse recovery. Furthermore, this property can be extended to stable and robust settings. We also presents some numerical experiments for this algorithm.<br>Science, Faculty of<br>Mathematic

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19

Mohamad, Hisham. "Distributed optical fibre strain sensing of geotechnical structures." Thesis, University of Cambridge, 2008. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.612416.

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20

Liu, Bo. "Sapphire Fiber-based Distributed High-temperature Sensing System." Diss., Virginia Tech, 2016. http://hdl.handle.net/10919/82741.

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From the monitoring of deep ocean conditions to the imaging and exploration of the vast universe, optical sensors are playing a unique, critical role in all areas of scientific research. Optical fiber sensors, in particular, are not only widely used in daily life such as for medical inspection, structural health monitoring, and environmental surveillance, but also in high-tech, high-security applications such as missile guidance or monitoring of aircraft engines and structures. Measurements of physical parameters are required in harsh environments including high pressure, high temperature, hig

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21

Xu, Yong Tai Yu-Chong. "Flexible MEMS skin technology for distributed fluidic sensing /." Diss., Pasadena, Calif. : California Institute of Technology, 2002. http://resolver.caltech.edu/CaltechETD:etd-12302004-144248.

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22

Schmidt, Ronald. "Distributed Access Control System." Universitätsbibliothek Chemnitz, 2001. http://nbn-resolving.de/urn:nbn:de:bsz:ch1-200100336.

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23

Hamid, Tariq Parwaiz. "Control of distributed objects." Thesis, University of the West of Scotland, 1994. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.260344.

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24

Wang, Zongyao. "Distributed robot flocking control." Thesis, University of Essex, 2009. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.499765.

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25

Huang, Qiang. "Distributed embedded control system." Thesis, University of Liverpool, 2003. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.400230.

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26

Wang, Jing. "Distributed Pressure and Temperature Sensing Based on Stimulated Brillouin Scattering." Thesis, Virginia Tech, 2013. http://hdl.handle.net/10919/78066.

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Brillouin scattering has been verified to be an effective mechanism in temperature and strain sensing. This kind of sensors can be applied to civil structural monitoring of pipelines, railroads, and other industries for disaster prevention. This thesis first presents a novel fiber sensing scheme for long-span fully-distributed pressure measurement based on Brillouin scattering in a side-hole fiber. After that, it demonstrates that Brillouin frequency keeps linear relation with temperature up to 1000°C; Brillouin scattering is a promising mechanism in high temperature distributed sensing. A sid

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27

Duck, Graham Ian. "Distributed Bragg grating sensing, strain transfer mechanics and experiments." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 2001. http://www.collectionscanada.ca/obj/s4/f2/dsk3/ftp04/NQ58592.pdf.

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28

Neri, Mark L. (Mark Lewis). "An approach to distributed sensing in a virtual fishtank." Thesis, Massachusetts Institute of Technology, 1997. http://hdl.handle.net/1721.1/42718.

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Thesis (M. Eng.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 1997.<br>Includes bibliographical references (leaves 44-45).<br>by Mark L. Neri.<br>M.Eng.

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29

Sammartino, P. F. "A comparison of processing approaches for distributed radar sensing." Thesis, University College London (University of London), 2009. http://discovery.ucl.ac.uk/16331/.

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Radar networks received increasing attention in recent years as they can outperform single monostatic or bistatic systems. Further attention is being dedicated to these systems as an application of the MIMO concept, well know in communications for increasing the capacity of the channel and improving the overall quality of the connection. However, it is here shown that radar network can take advantage not only from the angular diversity in observing the target, but also from a variety of ways of processing the received signals. The number of devices comprising the network has also been taken in

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30

Lees, Gareth P. "Q-switched fibre laser sources for distributed sensing applications." Thesis, University of Southampton, 1998. https://eprints.soton.ac.uk/394390/.

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This thesis examines pulsed fibre sources for distributed sensing applications. A number of Q-switched fibre laser sources optimised for high peak powers, narrow linewidth and short pulse duration are described. The source specifications were dictated by the requirements of Raman and Brillouin distributed sensing systems. The spatial resolution of distributed sensors is related to the pulse width whereas the range is dependent on the power launched into the sensing fibre. Brillouin distributed sensors also require that the source linewidth is less than 10 GHz, the separation between the Raylei

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31

de, Souza Keith R. C. P. "Fibre-optic distributed sensing based on spontaneous Brillouin scattering." Thesis, University of Southampton, 1999. https://eprints.soton.ac.uk/351507/.

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This thesis reports on the use of spontaneous Brillouin scattering for the purpose of fibre-optic distributed temperature and strain sensing based on a time-domain Landau-Placzek ratio technique. Detection system specifications are dictated by the spatial resolution, range, measurand resolution and measurement time. Pulsed sources are used in these sensors. The minimum spatial resolution depends on both the pulse width and receiver bandwidth. The range and measurand resolution depend on the peak pulse power launched into the sensing fibre as well as the Brillouin signal-to-noise characteristic

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32

Yu, Li. "Multi-Material Fiber Fabrication and Applications in Distributed Sensing." Diss., Virginia Tech, 2019. http://hdl.handle.net/10919/99380.

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Distributed sensing has been an attractive alternative to the traditional single-point sensing technology when measurement at multiple locations is required. Traditional distributed sensing methods based on silica optical fiber and electric coaxial cables have some limitations for specific applications, such as in smart textiles and wearable sensors. By adopting the fiber thermal drawing technique, we have designed and fabricated multi-material electrode-embedded polymer fibers with distributed sensing capabilities. Polymers sensitive to temperature and pressure have been incorporated into the

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33

Sang, Alexander Kipkosgei. "Distributed Vibration Sensing using Rayleigh Backscatter in Optical Fibers." Diss., Virginia Tech, 2011. http://hdl.handle.net/10919/77274.

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Sensing has been essential for the investigation, understanding, exploitation, and utilization of physical phenomena. Traditional single-point sensing methods are being challenged by the multi-point or distributed sensing capabilities afforded by optical fiber sensors. A powerful technique available for distributed sensing involves the use of the Optical Frequency Domain Reflectometry (OFDR). This work focuses on using OFDR as a means of obtaining distributed vibration measurements using the Rayleigh scatter along a single-mode optical fiber. The effort begins by discussing various distributed

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34

Moa, Sandberg. "Distributed Temperature Sensing för kontroll av inläckage i spillvattenledningar." Thesis, Uppsala universitet, Institutionen för geovetenskaper, 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-445633.

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Infiltration and inflow (I/I) are common problems in the foul sewer system. A method to detect I/I that is not commonly used in Sweden is DTS, Distributed Temperature Sensing. DTS is based on continuous measurements of temperature over a predetermined distance in the sewer system. The I/I is detected as temperature differences in the temperature data that is registered in the sewer system. The measurements often take place over a couple of weeks or months in the sewer system. The aim of this project was to review previous studies where DTS was used to detect I/I in foul sewers. Data from a wa

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35

Johansson, Olof, and Daniel Persson. "Workflows and Distributed Version Control." Thesis, Blekinge Tekniska Högskola, Sektionen för datavetenskap och kommunikation, 2011. http://urn.kb.se/resolve?urn=urn:nbn:se:bth-3613.

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This bachelor thesis focuses on distributed version control systems and workflows used when working with such systems. The thesis will investigate benefits and disadvantages in using distributed version control in software development using a literature review of the available articles on the subject as well as a post-mortem analysis (with questionnaires and data collected from the build environment) of a student run software engineering project. We find that the migration costs are high, but that the advantages may outweigh its drawbacks for some. We conclude that many projects would benefit

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36

Dev, Kashinath. "Concurrency control in distributed caching." NCSU, 2005. http://www.lib.ncsu.edu/theses/available/etd-10112005-172329/.

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Replication and caching strategies are increasingly being used to improve performance and reduce delays in distributed environments. A query can be answered more quickly by accessing a cached copy than making a database round trip. Numerous techniques have been proposed to achieve caching and replication in various contexts. In our context of flat cluster-based networks, we have observed that none of the schemes prove to be optimal for all scenarios. In this thesis we look at concurrency control techniques for achieving consistency in distributed caching in flat cluster-based networks. We then

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37

Shucker, Brian. "Control of distributed robotic macrosensors." Diss., Connect to online resource, 2006. http://gateway.proquest.com/openurl?url_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:dissertation&res_dat=xri:pqdiss&rft_dat=xri:pqdiss:3239382.

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38

Field-Richards, Hugh Sherwood. "A distributed control microprocessor system." Thesis, Imperial College London, 1985. http://hdl.handle.net/10044/1/37693.

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39

Zhao, Fang Ph D. Massachusetts Institute of Technology. "Distributed control of coded networks." Thesis, Massachusetts Institute of Technology, 2010. http://hdl.handle.net/1721.1/57776.

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Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 2010.<br>Cataloged from PDF version of thesis.<br>Includes bibliographical references (p. 97-101).<br>The introduction of network coding has the potential to revolutionize the way people operate networks. For the benefits of network coding to be realized, distributed solutions are needed for various network problems. In this work, we look at three aspects of distributed control of coded networks. The first one is distributed algorithms for establishing minimum-cost multicast connection

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40

Burdis, Keith Robert. "Distributed authentication for resource control." Thesis, Rhodes University, 2000. http://hdl.handle.net/10962/d1006512.

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This thesis examines distributed authentication in the process of controlling computing resources. We investigate user sign-on and two of the main authentication technologies that can be used to control a resource through authentication and providing additional security services. The problems with the existing sign-on scenario are that users have too much credential information to manage and are prompted for this information too often. Single Sign-On (SSO) is a viable solution to this problem if physical procedures are introduced to minimise the risks associated with its use. The Generic Secur

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41

Phadke, Swanand Shripad. "Distributed Control for Smart Lighting." The Ohio State University, 2010. http://rave.ohiolink.edu/etdc/view?acc_num=osu1274899902.

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42

Deshpande, Pranav. "Distributed Supervisory Control of Workflows." [Tampa, Fla.] : University of South Florida, 2003. http://purl.fcla.edu/fcla/etd/SFE0000209.

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43

Lundin, Mats. "Building Distributed Control Systems Using Distributed Active Real-Time Databases." Thesis, University of Skövde, Department of Computer Science, 1998. http://urn.kb.se/resolve?urn=urn:nbn:se:his:diva-234.

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<p>From the field of control theory, we can see that varying communication delays in a control system may be hard or even impossible to handle. From this point of view it is preferable to have these delays bounded and as small and as possible in order to adapt the control process to them. On the other hand, in some cases delays are inevitable and must be handled by the control system.</p><p>A control system may for different reasons be distributed, e.g., because of a distributed environment or severe environment demands such as heat or dust at some locations. Information in such a system will

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44

Gagliani, Roberto. "Distributed capacitance sensing for characterization of nuclear power plant cables." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2018.

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Depending on their location in a nuclear power plant, cables are exposed to mechanical stresses, elevated temperature, radiation, humidity and environmental stresses which can lead the cables to an earlier degradation if not well designed. For this reason, it is crucial to understand how materials that insulation and jacket are made of, installed in NPPs, will age during their service life and to develop condition monitoring techniques to assure continued safe operation under the normal operating condition and under Design Basis Event (DBE). Nowadays methods based on tensile tests like Elongat

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45

Zhang, Jian. "Nonlinear methods for distributed sensing in high birefringence optical fibres." Thesis, King's College London (University of London), 1998. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.300417.

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46

Thomas, Richard. "Spread spectrum and detection techniques for distributed optical fibre sensing." Thesis, King's College London (University of London), 1998. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.267159.

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47

Wait, Peter Collinson. "The application of Brillouin scattering to distributed fibre optic sensing." Thesis, University of Southampton, 1997. https://eprints.soton.ac.uk/394568/.

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This thesis reports on an investigation into the application of Brillouin scattering for the purpose of distributed fibre optic sensing. The main focus of the work has been centred on a Brillouin optical time domain reflectometer (BOTDR) system. The behaviour of short (3m), medium (60m) and long (6km) erbium doped fibre amplifiers using narrow bandwidth pulsed signals has been investigated and the most suitable configuration for the source requirement of the BOTDR identified. The operation of a (BOTDR) system has been demonstrated at the low loss window of 1.5µm wavelength. Multiple Stokes ord

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48

Pyrak, Matthew James. "Distributed Sensing Testbed Development for Wavelet Based Global Map Estimation." Thesis, Virginia Tech, 2013. http://hdl.handle.net/10919/23111.

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The development of a fleet of flexible and ruggedized unmanned ground vehicles for use in autonomy and distributed sensing research has resulted in a mature platform with proven capabilities. Each Mapping Autonomous Ground Vehicle (MAGV) is capable of travel on- and off-road, speeds up to 10 mph, and its sturdy construction with a rugged suspension cushions onboard instruments from vibrations. The large battery capacity can sustain at least eight hours of hard use, including powering all onboard electronics. The MAGV is fitted with a high accuracy GPS/INS system for centimeter-accuracy localiz

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Ek, Simon. "Distributed Temperature Sensing Using Phase-Sensitive Optical Time Domain Reflectometry." Thesis, KTH, Tillämpad fysik, 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-285902.

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This thesis explores and evaluates the temperature measuring capabilities of a phase-sensitive optical time-domain reflectometer (φ-OTDR), which exploits Rayleigh backscattering in normal single mode optical fibers. The device is constructed and its setup explained, and a protocol for making temperature measurements with it is developed. Performance tests are made and the device is shown to achieve fully distributed temperature measurements on fibers hundreds of meters in length with a spatial resolution of 1 m and a temperature resolution of 0.1 K. In addition, the capabilities of the device

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50

Rahimi, Mohammad Reza. "Distributed Stress Sensing And Non-Destructive Tests Using Mechanoluminescence Materials." University of Akron / OhioLINK, 2015. http://rave.ohiolink.edu/etdc/view?acc_num=akron1430763721.

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