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Relevant bibliographies by topics / Aerospace engineering / Dissertations / Theses

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Dissertations / Theses on the topic 'Aerospace engineering'

Author: Grafiati

Published: 4 June 2021

Last updated: 25 July 2025

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1

Figueroa, Leonard J. "Aerospace Intrapreneurship: Systems Engineering an Aerospace Front End." Digital Commons at Loyola Marymount University and Loyola Law School, 2017. https://digitalcommons.lmu.edu/etd/394.

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2

Pratt, Roger W. "Control problems in aerospace engineering." Thesis, Loughborough University, 1995. https://dspace.lboro.ac.uk/2134/27604.

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Control Engineering is a wide-ranging discipline which offers opportunities in research to people with diverse backgrounds and interests; from applied mathematicians interested solely in developing new theory right through to pragmatic engineers who are closely involved in a particular application. Additionally, for those involved in the application of control methodologies, there are the bonuses of complementing modelling, analysis and design with experimental validation. For my part, work has centred on the application of existing techniques in new areas. Since the early part of my career we

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3

Marvasti, Mazda Alim. "Applications of fractal geometry in aerospace engineering." Diss., Georgia Institute of Technology, 1991. http://hdl.handle.net/1853/12079.

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4

Jenett, Benjamin (Benjamin Eric). "Digital material aerospace structures." Thesis, Massachusetts Institute of Technology, 2015. http://hdl.handle.net/1721.1/101837.

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Thesis: S.M., Massachusetts Institute of Technology, Department of Civil and Environmental Engineering, 2015.<br>Cataloged from PDF version of thesis.<br>Includes bibliographical references (pages 71-76).<br>This thesis explores the design, fabrication, and performance of digital materials in aerospace structures in three areas: (1) a morphing wing design that adjusts its form to respond to different behavioral requirements; (2) an automated assembly method for truss column structures; and (3) an analysis of the payload and structural performance requirements of space structure elements made f

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5

Stimac, Andrew K. (Andrew Kenneth) 1977. "Precision navigation for aerospace applications." Thesis, Massachusetts Institute of Technology, 2004. http://hdl.handle.net/1721.1/16676.

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Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 2004.<br>Vita.<br>Includes bibliographical references (p. 162). Includes bibliographical references (p. 162).<br>This electronic version was submitted by the student author. The certified thesis is available in the Institute Archives and Special Collections.<br>Navigation is important in a variety of aerospace applications, and commonly uses a blend of GPS and inertial sensors. In this thesis, a navigation system is designed, developed, and tested. Several alternatives are discussed, but the ultimate design

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6

Aouf, Nabil. "Robust control techniques for aerospace vehicles." Thesis, McGill University, 2001. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=38145.

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The research work presented in this thesis deals with flight control problems. Based on robust control techniques such as H infinity control and mu-synthesis, we develop control laws that are efficient in reducing gust loads on flexible aircraft. Uncertainty models for flexible aircraft are proposed and shown to be well adapted for robust control design, while tightly covering unknown but bounded variations of flexible mode parameters. One of the models presented introduces a new complex-rational controller design methodology that takes advantage of the uncertain plant structure and achieves g

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7

Hart, Peter Bartholomew. "A plm implementation for aerospace systems engineering-conceptual rotorcraft design." Thesis, Georgia Institute of Technology, 2009. http://hdl.handle.net/1853/28278.

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The thesis will discuss the Systems Engineering phase of an original Conceptual Design Engineering Methodology for Aerospace Engineering-Vehicle Synthesis. This iterative phase is shown to benefit from digitization of Integrated Product&Process Design (IPPD) activities, through the application of Product Lifecycle Management (PLM) technologies. Requirements analysis through the use of Quality Function Deployment (QFD) and 7 MaP tools is explored as an illustration. A "Requirements Data Manager" (RDM) is used to show the ability to reduce the time and cost to design for both new and legacy/deri

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8

Austin, Mary Viva. "Improving Aerospace Engineering Laboratory Accessibility by Web Exporting Classes and Tasks." MSSTATE, 2005. http://sun.library.msstate.edu/ETD-db/theses/available/etd-04042005-044515/.

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In recent years, changes to the aerospace engineering curriculum have moved the laboratory classes ahead in the four year program. In an effort to alleviate the introduction of prerequisite and scheduling problems resulting from the curriculum changes, a study into the approach of making laboratory classes more accessible was initiated. Two options are in the process of being implemented as a solution to current and future curriculum obstacles as a result of this study. First, the first semester laboratory class has been successfully converted to an introduction to laboratory procedures class

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9

Levedahl, Blaine Alexander. "Decentralized Autonomous Control of Aerospace Vehicle Formations." NCSU, 2003. http://www.lib.ncsu.edu/theses/available/etd-03062003-104749/.

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Two approaches for the autonomous control of aerospace vehicle formations are developed. The development of the approaches relies on fundamental work in the areas of distributed control; specifically modal, robust, optimal, and decentralized control. The algorithms are shown to satisfy five separation principles that simplify design and enable the algorithms to be implemented reliably. The autonomous controllers uniformly dampen the modes of the formation (global control) using a decentralized approach and a nearest-neighbor approach. A numerical example illustrates robust formation changes fr

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10

Bennett, William Thomas. "Computational and Experimental Investigations into Aerospace Plasmas." Wright State University / OhioLINK, 2008. http://rave.ohiolink.edu/etdc/view?acc_num=wright1212780703.

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11

Kirtley, Aaron L. (Aaron Lloyd) 1977. "Fostering innovation across aerospace supplier networks." Thesis, Massachusetts Institute of Technology, 2002. http://hdl.handle.net/1721.1/82696.

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Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering; and, (S.M.)--Massachusetts Institute of Technology, Engineering Systems Division, Technology and Policy Program, 2002.<br>This electronic version was submitted by the student author. The certified thesis is available in the Institute Archives and Special Collections.<br>"June 2002." Page 187 blank.<br>Includes bibliographical references (p. 180-184).<br>by Aaron L. Kirtley.<br>S.M.

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12

Galea, Michael. "High performance, direct drive machines for aerospace applications." Thesis, University of Nottingham, 2013. http://eprints.nottingham.ac.uk/14431/.

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For aerospace related electric systems, torque/force density, reliability and fault tolerance are of the utmost importance. A method by which high figures of reliability can be achieved is by eliminating any mechanical gearing or interconnection elements between the electrical machine and its mechanical load. This means that direct drive, electrical machines must be employed. However, to implement such solutions (without any mechanical advantages), electrical machines with excellent torque density (for rotational machines) and force density (for linear machines) performances are required. In t

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13

Lazim, Duraid. "Springback in draw-bending on aerospace alloys." Thesis, McGill University, 2003. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=79244.

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The springback phenomenon was studied by a series of draw-bend tests. These tests were done by varying the blankholding pressure with different lubrication conditions, and with different transverse anisotropy directions. The purpose is to find the forming loads, the thickness changes and the springback angles. It has been found that the springback angle after unloading depends on the amount of blankholding pressure, the material properties, and the tool geometry. Increasing the blankholding pressure almost eliminates the springback if the tensile stress caused by the blankholding pressu

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14

Cauberghs, Julien. "Out-of-autoclave manufacturing of aerospace representative parts." Thesis, McGill University, 2012. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=106593.

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The use of carbon fibre reinforced composites for aerospace structures has seen a high increase in recent years, and is still growing. The high stiffness-to-weight ratio of these materials makes them ideal for primary structures on airplanes, satellites, and spacecrafts. Nevertheless, the manufacturing of composites remains very costly since it requires equipment investment such as an autoclave, and very qualified workers. Out-of-autoclave manufacturing technology is very promising since it only requires a traditional oven, while still aiming at similar part quality. However, the absence of po

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15

Nill, Scott T. (Scott Thomas). "Aerospace composite manufacturing cost models as geometric programs." Thesis, Massachusetts Institute of Technology, 2018. http://hdl.handle.net/1721.1/118731.

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Thesis: Ph. D., Massachusetts Institute of Technology, Department of Mechanical Engineering, 2018.<br>Cataloged from PDF version of thesis.<br>Includes bibliographical references (pages 108-110).<br>The introduction of large, composite transport aircraft, such as the Airbus A350 and the Boeing 787, has been fraught with billions of dollars of production cost overruns. This research develops a novel approach to manufacturing cost modeling during the conceptual design phase using Geometric Programming (GP). A new formulation of a closed queuing network as a GP is presented to capture the crucial

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16

Fiorenza, Paul R. "Delivering Program Efficiency to Aerospace Testing Using Designed Experiments." Thesis, The George Washington University, 2018. http://pqdtopen.proquest.com/#viewpdf?dispub=10928677.

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<p> Given the increasing complexity of systems and the cost associated with test and evaluation of aerospace systems, more efficient methods are sought. Randomized test designs for aviation developmental test activities and other complex systems may not enable safe test conduct and may be prohibitively costly from a financial or time point of view. This research reviews Design of Experiments (DoE) test design approaches applicable to aerospace prototype test and evaluation activities. It proposes the use of Split Plot Optimal Designs to leverage advantages of DoE while satisfying requirements

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17

Clark, Daniel. "Net shape engineering for high performance aerospace applications : targeted development of novel technologies for aerospace near net shape combustor module applications." Thesis, University of Birmingham, 2012. http://etheses.bham.ac.uk//id/eprint/7200/.

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Two additive processing scenarios were considered covering manufacturing and repair applications. One scenario required evaluation of three processes for the addition of shaped blocks to a casing. The other involved infilling a shallow hemispherical indent with one of three polycrystalline alloys (alloy 718, waspaloy™ and RR1000) using different deposition strategies. Processinduced discontinuities were characterised and controlled using a design of experiments approach. As distinct from welding, process variables of overlap, Toolpath, bead shape,sequencing and incremental height were establis

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18

Dabboussi, Wael. "High strain rate deformation and fracture of engineering materials." Thesis, McGill University, 2003. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=79224.

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Containment structures for aircraft engines must withstand impacts of failed engine components, which may be traveling at extremely high velocities. Therefore, the design of such structures requires a thorough knowledge of material behaviour at high rates of deformation. It is well known that at strain rates above 102 s-1, the yield stress of metals may be significantly different than at quasi-static rates. In addition, material fracture under dynamic loading can also differ from that at slower rates due to manifestation of different failure mechanisms. The purpose of this study was to

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19

Lovell, Claire Michelle. "Friction welding for high performance aerospace applications." Thesis, University of Birmingham, 2012. http://etheses.bham.ac.uk//id/eprint/4312/.

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20

Sebastian, Christopher. "Towards the validation of thermoacoustic modelling in aerospace structures." Thesis, University of Liverpool, 2015. http://livrepository.liverpool.ac.uk/2012079/.

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The research presented in this thesis has been performed over the course of three years under funding from the European Office of the United States Air Force (EAORD) as a part of a long-term project to collect high quality data for the validation of computational mechanics models of thermoacoustic loading. The focus is on the adaptation of stereoscopic (3D) Digital Image Correlation for use in a combined thermal and high temperature measurements. To that end, a background is provided which highlights the current state of the art in high temperature, vibration experiments and data acquisition.

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21

Burgess, Rachel. "The business process engineering of an aerospace aftermarket supply chain : executive summary." Thesis, University of Warwick, 1999. http://wrap.warwick.ac.uk/34683/.

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The following report provides an overview of the Engineering Doctorate portfolio entitled The Business Process Engineering of an Aerospace Aftermarket Supply Chain.' It is intended to set the context of the portfolio in the engineering business environment and identify the innovative achievements of the work. Three main themes underline the portfolio and are outlined here; the use of Supply Chain Management (SCM) in the aerospace industry, the barriers to SCM implementation, and the links between SCM and Business Process (Re)Engineering. These themes are used to explore the findings and conclu

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22

Chatting, Ian. "An attribute management process to enhance concurrent engineering in the aerospace industry." Thesis, University of Bath, 2001. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.392057.

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23

McCrory, John. "Advanced Acoustic Emission (AE) monitoring techniques for aerospace structures." Thesis, Cardiff University, 2016. http://orca.cf.ac.uk/89212/.

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This thesis contains the development of advanced Acoustic Emission (AE) monitoring techniques for aerospace structures. The techniques developed in this work explore AE’s ability to detect, locate and characterise signals. Experimental studies were conducted on a range of structures made from typical aerospace materials, including carbon fibre composite, GLARE and high grade steel; and the data collected from these studies was processed using the newly developed AE techniques, in order to determine their effectiveness. The work was divided into three main areas of research: 1. AE Source Locati

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24

Abid, Rabia. "Electrical characterisation of aerospace grade carbon-fibre-reinforced polymers." Thesis, Cardiff University, 2015. http://orca.cf.ac.uk/91269/.

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This thesis is primarily concerned with experimental tests and computer simulations to determine electrical characteristics of carbon fibre composites used in aerospace. The work has involved an extensive review of published literature, numerical modelling and experimental findings on electrical characterization of carbon fibre composites. The numerical modelling on carbon composites was carried out using finite element package COMSOL, using preliminary conductivity values from literature. Lightning impulse waveform D was used, on a surface electrode to study the effect of lightning strike on

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25

Boyd, Kali. "Predicting Performance Capabilities and Designing a New Wing for an Unknown Aircraft Using Reverse Engineering Techniques." The Ohio State University, 2021. http://rave.ohiolink.edu/etdc/view?acc_num=osu1618312172848158.

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26

Raja, Muneeb Masood. "Extended Kalman Filter and LQR controller design for quadrotor UAVs." Wright State University / OhioLINK, 2017. http://rave.ohiolink.edu/etdc/view?acc_num=wright1496152489565477.

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27

Buettner, Robert W. "Dynamic Modeling and Simulation of a Variable Cycle Turbofan Engine with Controls." Wright State University / OhioLINK, 2017. http://rave.ohiolink.edu/etdc/view?acc_num=wright1496179248257409.

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28

Chiu, Brendon W. "Additive manufacturing applications and implementation in aerospace." Thesis, Massachusetts Institute of Technology, 2020. https://hdl.handle.net/1721.1/126950.

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Thesis: M.B.A., Massachusetts Institute of Technology, Sloan School of Management, May, 2020<br>Thesis: S.M., Massachusetts Institute of Technology, Department of Mechanical Engineering, May, 2020<br>Cataloged from the official PDF of thesis.<br>Includes bibliographical references (pages 107-108).<br>Many aerospace companies are turning to additive manufacturing solutions to stream-line current production processes and open opportunities for on-demand producibility. While many OEMs are drawn to the appeal of the benefits that additive manufacturing brings, they are beginning to understand the

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29

Debeney, Louis. "Control Cost Reduction in the Aerospace Industry." Thesis, KTH, Rymdteknik, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-215004.

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This report deals with new technologies about control time saving and reliability within a manufacturing unit at Airbus Safran Launchers. Firstly, it analyses various kind of checked performances and describes how checking processes work in the different workshops and define what the main problems are. Then, it focuses on checking countersunk holes control and on three-dimensional control. It studies two kinds of new technologies and explains how it can decrease checking time relating to these two issues and how it can increase control reliability. To conclude, it also presents some other tech

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30

Frauenberger, Douglas H. "Lean transformation in aerospace assembly operations." Thesis, Massachusetts Institute of Technology, 2007. http://hdl.handle.net/1721.1/39728.

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Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering; and, (M.B.A.)--Massachusetts Institute of Technology, Sloan School of Management; in conjunction with the Leaders for Manufacturing Program at MIT, 2007.<br>Includes bibliographical references (p. 81-82).<br>For the past two decades, virtually all manufacturing companies in the United States have adopted or are in the process of adopting lean manufacturing. Globalization has resulted in the increased availability of reliable, low cost sources putting greater pressures on traditional US manufacturing companie

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31

Rueger, Mathew Lee. "An experimental investigation of the effect of vortex generators on the aerodynamic characteristics of a NACA 0021 airfoil undergoing large amplitude pitch oscillations." The Ohio State University, 1988. http://rave.ohiolink.edu/etdc/view?acc_num=osu1407506629.

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32

Cho, Daniel. "Identifying the Essential Reliability, Availability, and Maintainability Tasks for Aerospace Systems." Digital Commons at Loyola Marymount University and Loyola Law School, 2011. https://digitalcommons.lmu.edu/etd/379.

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This report provides the essential Reliability, Availability, and Maintainability (RAM) tasks that can be applicable to all types of aerospace projects varying in contract cost and complexity. The drive for this study was to identify a set of tailorable tasks to apply towards smaller aerospace programs. Though the report is specifically focused on aerospace projects, these essential RAM tasks and principles can be applied across all types of complex systems that require a high level of reliability. Methods of analysis were primarily focused on comparing Northrop Grumman Aerospace System (NGAS)

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33

Nortje, Hermann. "An investigation of fretting wear in aerospace applications." Thesis, Stellenbosch : Stellenbosch University, 2011. http://hdl.handle.net/10019.1/17851.

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Thesis (MScEng)--Stellenbosch University, 2011.<br>ENGLISH ABSTRACT: Fretting wear results in the loss of fit and tolerance at contact interfaces. The aerospace and aircraft industry is severely impacted by fretting wear and fretting fatigue that frequently occurs in turbo machinery and riveted structural connections. There have been numerous studies, investigating the fretting phenomenon for these aerospace applications. Literature available in regard to fretting wear encountered in these aerospace applications is limited. This study is therefore aimed at investigating the fretting wear

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34

Negri, Christopher Anthony. "Ductile Fracture of Laser Powder Bed Fusion Additively Manufactured Ti-6Al-4V." University of Dayton / OhioLINK, 2021. http://rave.ohiolink.edu/etdc/view?acc_num=dayton1627570434852405.

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35

Wang, Jennifer Y. "Migration of aerospace technologies to adjacent markets." Thesis, Massachusetts Institute of Technology, 2014. http://hdl.handle.net/1721.1/105302.

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Thesis: S.M. in Engineering and Management, Massachusetts Institute of Technology, Engineering Systems Division, 2014.<br>Cataloged from PDF version of thesis.<br>Includes bibliographical references (pages 51-56).<br>Shrinking government budgets due to economic woes has aerospace and defense contractors scrambling to sustain their business and minimize the effects of budget sequestration. Given the global economic climate and the level of federal debt, government budget spending is unlikely to recover in the near future to previous levels, where aerospace and defense contractors had enjoyed an

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36

Wilson, Bryan K. (Bryan Keith). "Risk from network disruptions in an aerospace supply chain." Thesis, Massachusetts Institute of Technology, 2010. http://hdl.handle.net/1721.1/61189.

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Thesis (M. Eng. in Logistics)--Massachusetts Institute of Technology, Engineering Systems Division, 2010.<br>Cataloged from PDF version of thesis.<br>Includes bibliographical references (p. 76-77).<br>This thesis presents methods for determining the effects of risk from disruptions using an aerospace supply chain as the example, primarily through the use of a computer simulation model. Uncertainty in the current marketplace requires managers to be cognizant of the adverse impact of risk on their company's performance. However, managers who lack formal procedures for dealing with the potential

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37

Dobbs, Daniel C. 1975. "Development of an aerospace manufacturing system design decomposition." Thesis, Massachusetts Institute of Technology, 2000. http://hdl.handle.net/1721.1/89302.

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Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering; and, (S.M.)--Massachusetts Institute of Technology, Technology and Policy Program, 2000.<br>Includes bibliographical references (p. 173-175).<br>by Daniel Charles Dobbs.<br>S.M.

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38

Diston, Dominic John. "Unified modelling of aerospace systems : a bond graph approach." Thesis, University of Glasgow, 1999. http://theses.gla.ac.uk/1729/.

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Systems Integration is widely accepted as the basis for improving the efficiency and performance of many engineering products. The aim is to build a unified optimised system not a collection of subsystems that are combined in some ad hoc manner. This moves traditional design boundaries and, in so doing, enables a structured evolution from an integrated system concept to an integrated system product. It is recognised that the inherent complexity cannot be handled effectively without mathematical modelling. The problem is not so much the large number of components but rather the very large numbe

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Mazdeh, Alireza. "Damping Parameter Study of a Perforated Plate with Bias Flow." University of Dayton / OhioLINK, 2012. http://rave.ohiolink.edu/etdc/view?acc_num=dayton1354457138.

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40

Eilers, Shannon Dean. "Development of the Multiple Use Plug Hybrid for Nanosats (Muphyn) Miniature Thruster." DigitalCommons@USU, 2013. https://digitalcommons.usu.edu/etd/1726.

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The Multiple Use Plug Hybrid for Nanosats (MUPHyN) prototype thruster incorporates solutions to several major challenges that have traditionally limited the deployment of chemical propulsion systems on small spacecraft. The MUPHyN thruster offers several features that are uniquely suited for small satellite applications. These features include 1) a non-explosive ignition system, 2) non-mechanical thrust vectoring using secondary fluid injection on an aerospike nozzle cooled with the oxidizer flow, 3) a non-toxic, chemically-stable combination of liquid and inert solid propellants, 4) a compact

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Lee, Chan Yuin. "Capturing value in outsourced aerospace supply chains." Thesis, Massachusetts Institute of Technology, 2008. http://hdl.handle.net/1721.1/44300.

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Thesis (M.B.A.)--Massachusetts Institute of Technology, Sloan School of Management; and, (S.M.)--Massachusetts Institute of Technology, Engineering Systems Division; in conjunction with the Leaders for Manufacturing Program at MIT, 2008.<br>Includes bibliographical references (p. 111-113).<br>The aerospace industry is increasingly outsourcing and offshoring their supply chains in order to maintain profitability in the face of increasing competition and globalization. This strategy for value creation inevitably increases the inherent risks and complexity in the supply chain. This in turn makes

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Lo, Billy S. (Billy Si Yee). "Inventory optimization in an aerospace supply chain." Thesis, Massachusetts Institute of Technology, 2007. http://hdl.handle.net/1721.1/39678.

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Thesis (M.B.A.)--Massachusetts Institute of Technology, Sloan School of Management; and, (S.M.)--Massachusetts Institute of Technology, Engineering Systems Division; in conjunction with the Leaders for Manufacturing Program at MIT, 2007.<br>Includes bibliographical references (p. 66-67).<br>Strategic inventory management has become a major focus for Honeywell Aerospace as the business unit challenged itself to meeting cost reduction goals while maintaining a high level of service to its customers. This challenge has become particularly important as customers have steered their purchase decisio

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Marroquin, Salvador Michael Deivi. "Hypervelocity Impact of Spherical Aluminum 2017-T4 Projectiles on Aluminum 6061-T6 Multi-Layered Sheets." Thesis, Mississippi State University, 2017. http://pqdtopen.proquest.com/#viewpdf?dispub=10642662.

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<p> With the growing threat of orbital debris impacts to space structures, the development of space shielding concepts has been a critical research topic. In this study, numerical simulations of the hypervelocity impact response of stacked aluminum 6061-T6 sheets were performed to assess the effects of layering on penetration resistance. This work was initially motivated by set of experimental tests where a stack of four aluminum sheets of equal thickness was observed to have a higher hypervelocity ballistic resistance than a monolithic aluminum sheet with the same total thickness. A set of sm

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Morris, Jackson Alexander. "Application of Shark Skin Flow Control Techniques to Airflow." Thesis, The University of Alabama, 2018. http://pqdtopen.proquest.com/#viewpdf?dispub=10638677.

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<p> Due to millions of years of evolution, sharks have evolved to become quick and efficient ocean apex predators. Shark skin is made up of millions of microscopic scales, or denticles, that are approximately 0.2 mm in size. Scales located on the shark’s body where separation control is paramount (such as behind the gills or the trailing edge of the pectoral fin) are capable of bristling. These scales are hypothesized to act as a flow control mechanism capable of being passively actuated by reversed flow. It is believed that shark scales are strategically sized to interact with the lower

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45

Robertson, Eric D. "Verification, validation, and implementation of numerical methods and models for OpenFOAM 2.0 for incompressible flow." Thesis, Mississippi State University, 2015. http://pqdtopen.proquest.com/#viewpdf?dispub=1596091.

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<p> A comprehensive survey of available numerical methods and models was performed on the open source computational fluid dynamics solver OpenFOAM version 2.0 for incompressible turbulent bluff body flows. Numerical methods are illuminated using source code for side-by-side comparison. For validation, the accuracy of flow predictions over a sphere in the subcritical regime and delta wing with sharp leading edge is assessed. Solutions show mostly good agreement with experimental data and data obtained from commercial software. A demonstration of the numerical implementation of a dynamic hybrid

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Wright, Brendan. "Using Neural Networks to Predict Vortex-Panel Analyses| A Feasibility Study." Thesis, Rensselaer Polytechnic Institute, 2019. http://pqdtopen.proquest.com/#viewpdf?dispub=10980821.

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<p> This thesis studies the feasibility of using neural networks to ''learn" the vortex panel method. This study is motivated by the desire for the rapid and accurate prediction of fluid flows during the preliminary design of engineering systems, where traditional computational fluid dynamics (CFD) are too computationally costly. The results show that a two-layer neural network can estimate the pressure coefficient and elements in the vortex-panel influence-coefficient matrix. However, when the neural-network-predicted influence-coefficient matrix is used to estimate the pressure coefficients,

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Whittaker, Matthew P. "Inertial Navigation Employing a Common Frame Error Definition." Thesis, State University of New York at Buffalo, 2019. http://pqdtopen.proquest.com/#viewpdf?dispub=13425252.

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<p> Within the field of Guidance, Navigation, and Control, the navigation process refers to accurately determining one's position in space. The quest of accurate navigation has shaped human history. Early navigation techniques involved dead reckoning with infrequent measurement updates from line-of-sights to stars or landmarks on the shore. The first practical inertial navigation system (INS) attributed to the German V-2 missile in 1942. In the early 1960's the Kalman filter was developed to aid in the merging of mathematical models and measurement updating. Throughout the space age and contin

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48

Wu, Xiaonan. "Design and Development of Variable Pitch Quadcopter for Long Endurance Flight." Thesis, Oklahoma State University, 2019. http://pqdtopen.proquest.com/#viewpdf?dispub=10813154.

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<p> The variable pitch quadrotor is not a new concept but has been largely ignored in small unmanned aircraft, unlike the fixed pitch quadcopter which is controlled only by changing the RPM of the motors and only has about 30 minutes of total flight time. The variable pitch quadrotor can be controlled either by the change of the motor RPM or rotor blade pitch angle or by the combination of both. This gives the variable pitch quadrotor potential advantages in payload, maneuverability and long endurance flight. This research is focused on the design methodology for a variable pitch quadrotor usi

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Gonzalez, Juan. "Spacecraft Formation Control| Adaptive PID-Extended Memory Recurrent Neural Network Controller." Thesis, California State University, Long Beach, 2019. http://pqdtopen.proquest.com/#viewpdf?dispub=10978237.

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<p> In today’s space industry, satellite formation flying has become a cost-efficient alternative solution for science, on-orbit repair and military time-critical missions. While in orbit, the satellites are exposed to the space environment and unpredictable spacecraft on-board disturbances that negatively affect the attitude control system’s ability to reduce relative position and velocity error. Satellites utilizing a PID or adaptive controller are typically tune to reduce the error induced by space environment disturbances. However, in the case of an unforeseen spacecraft distur

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Rana, Akshaykumar A. "Evaluation of Electrical and Mechanical Properties of Carbon-Fiber Composites Using Interleaved Materials." Thesis, California State University, Long Beach, 2019. http://pqdtopen.proquest.com/#viewpdf?dispub=10979176.

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<p> Carbon-Fiber Reinforced Polymers (CFRPs) provides superior mechanical properties and low weight, enabling their extensive use in the aerospace industry. Susceptibility to internal damage due to out-of-plane loads and poor electrical properties are some of their major challenges that require to be addressed in order to increase the utilization of composites in further aerospace structures. Lightning strikes can lead to catastrophic damage, inflicting high repair and certification costs. Lightning Strike Protection (LSP) solutions such as integration of metallic meshes or foils into the comp

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