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Systems Engineering and Multidisciplinary Design Optimization Commons

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The Challenges Of Building Intelligent Tutoring Systems For Teams, Desmond Bonner, Stephen B. Gilbert, Michael C. Dorneich, Eliot Winer, Anne M. Sinatra, Anna Slavina, Anastacia MacAllister, Joseph Holub 2017 Iowa State University

The Challenges Of Building Intelligent Tutoring Systems For Teams, Desmond Bonner, Stephen B. Gilbert, Michael C. Dorneich, Eliot Winer, Anne M. Sinatra, Anna Slavina, Anastacia Macallister, Joseph Holub

Anastacia MacAllister

Intelligent Tutoring Systems have been useful for individual instruction and training, but have not been widely created for teams, despite the widespread use of team training and learning in groups. This paper reviews two projects that developed team tutors: the Team Multiple Errands Task (TMET) and the Recon Task developed using the Generalized Intelligent Framework for Tutoring (GIFT). Specifically, this paper 1) analyzes why team tasks have significantly more complexity than an individual task, 2) describes the two team-based platforms for team research, and 3) explores the complexities of team tutor authoring. Results include a recommended process for authoring a ...


Cyber-Physical System Characterization And Co-Regulation Of A Quadrotor Uas, Seth E. Doebbeling 2017 University of Nebraska - Lincoln

Cyber-Physical System Characterization And Co-Regulation Of A Quadrotor Uas, Seth E. Doebbeling

Mechanical (and Materials) Engineering -- Dissertations, Theses, and Student Research

An Unmanned Aircraft System (UAS) is a Cyber-Physical System (CPS) in which a host of real-time computational tasks contending for shared resources must be cooperatively managed to obtain mission objectives. Traditionally, control of the UAS is designed assuming a fixed, high sampling rate in order to maintain reliable performance and margins of stability. But emerging methods challenge this design by dynamically allocating resources to computational tasks, thereby affecting control and mission performance. To apply these emerging strategies, a characterization and understanding of the effects of timing on control and trajectory following performance is required. Going beyond traditional control evaluation techniques ...


Optimization Of Miniaturized Resonant Microwave Cavities For Use In Q-Thrusters, Joshua Steven Pennington 2017 University of Arkansas, Fayetteville

Optimization Of Miniaturized Resonant Microwave Cavities For Use In Q-Thrusters, Joshua Steven Pennington

Theses and Dissertations

A gedankenexperiment was considered to compare a hypothetical thruster that used no reaction mass to propulsion methods currently in use. A brief discussion of previous research work done on closed resonant cavity thrust devices was conducted. Using the previous work as a template, a simulation plan was devised. Computational models of resonant microwave cavities were constructed and investigated using COMSOL software. These COMSOL simulations were verified against known analytical solutions using Matlab software as a computational tool. Multiphysics simulations were created to study the microwave heating environment of the resonant cavities. From the COMSOL study outputs, the electromagnetic field magnitude ...


Cruise Missile Integrated Air Defense System Penetration: Modeling The S-400 System, Michael Pelosi, Amie K. Honeycutt 2017 East Central University, Ada OK

Cruise Missile Integrated Air Defense System Penetration: Modeling The S-400 System, Michael Pelosi, Amie K. Honeycutt

International Journal of Aviation, Aeronautics, and Aerospace

This research determines improved flight-path routes that make maximum utilization of terrain-masking opportunities, and defending radar and missile system equipment performance and launch timing constraints, in order to avoid radar detection and tracking, and to mitigate subsequent missile shoot-down risks. The problem is formulated as one of constrained optimization in three dimensions. Advantageous solutions are identified using the A* Algorithm in conjunction with detailed equipment performance and constraint calculations and high-resolution digital terrain elevation maps. Topographical features in digital terrain are exploited by the algorithm to avoid radar detection and tracking. The model includes provisions for all-aspect/all-frequency radar cross ...


Development Of High-Order Realizable Finite-Volume Schemes For Quadrature-Based Moment Method, Varun Vikas, Z. J. Wang, Alberto Passalacqua, Rodney O. Fox 2017 Iowa State University

Development Of High-Order Realizable Finite-Volume Schemes For Quadrature-Based Moment Method, Varun Vikas, Z. J. Wang, Alberto Passalacqua, Rodney O. Fox

Rodney O. Fox

Kinetic equations containing terms for spatial transport, gravity, fluid drag and particle-particle collisions can be used to model dilute gas-particle flows. However, the enormity of independent variables makes direct numerical simulation of these equations almost impossible for practical problems. A viable alternative is to reformulate the problem in terms of moments of velocity distribution. Recently, a quadrature-based moment method was derived by Fox for approximating solutions to kinetic equation for arbitrary Knudsen number. Fox also described 1st- and 2nd-order finite-volume schemes for solving the equations. The success of the new method is based on a moment-inversion algorithm that is used ...


A Fully Coupled Fluid-Particle Flow Solver Using Quadrature-Based Moment Method With High-Order Realizable Schemes On Unstructured Grids, Varun Vikas, Z. J. Wang, Alberto Passalacqua, Rodney O. Fox 2017 Iowa State University

A Fully Coupled Fluid-Particle Flow Solver Using Quadrature-Based Moment Method With High-Order Realizable Schemes On Unstructured Grids, Varun Vikas, Z. J. Wang, Alberto Passalacqua, Rodney O. Fox

Rodney O. Fox

Kinetic Equations containing terms for spatial transport, gravity, fluid drag and particle-particle collisions can be used to model dilute gas-particle flows. However, the enormity of independent variables makes direct numerical simulation of these equations almost impossible for practical problems. A viable alternative is to reformulate the problem in terms of moments of the velocity distribution function. A quadrature method of moments (QMOM) was derived by Desjardins et al. [1] for approximating solutions to the kinetic equation for arbitrary Knudsen number. Fox [2, 13] derived a third-order QMOMfor dilute particle flows, including the effect of the fluid drag on the particles ...


Modeling And Simulation Of A Sounding Rocket Active Stabilization System, Steven M. MacLean 2017 California Polytechnic State University - San Luis Obispo

Modeling And Simulation Of A Sounding Rocket Active Stabilization System, Steven M. Maclean

Master's Theses and Project Reports

The Horizon Simulation Framework is a modeling and simulation framework developed to verify system level requirements. In this thesis, the framework is extended to include the Dynamic position type that existed in the early development phase of the framework. The Dynamic position type is tested through the modeling and simulation of a sounding rocket. An active control system based on linear-quadratic regulator (LQR) control theory is implemented and tested in the simulation to determine the overall effect on altitude. A first order aerodynamics and aeroprediction model are created within the framework to allow for rapid changes early in the design ...


Mass Estimation Through Fusion Of Astrometric And Photometric Data Collection With Application To High Area-To-Mass Ratio Objects, Matthew Richardson 2017 California Polytechnic State University, San Luis Obispo

Mass Estimation Through Fusion Of Astrometric And Photometric Data Collection With Application To High Area-To-Mass Ratio Objects, Matthew Richardson

Master's Theses and Project Reports

This thesis work presents the formulation for a tool developed in MATLAB to determine the mass of a space object from the fusion of astrometric and photometric data. The application for such a tool is to better model the mass estimation method used for high area-to-mass ratio objects found in high altitude orbit regimes. Typically, the effect of solar radiation pressure is examined with angles observations to deduce area-to-mass ratio calculations for space objects since the area-to-mass ratio can greatly affect its orbital dynamics. On the other hand, photometric data is not sensitive to mass but is a function of ...


Enceladus Sample Return Mission, Braxton Brakefield, Rekesh Ali, Andrew Bishop, Shelby Honaker, David Taylor 2017 University of Tennessee, Knoxville

Enceladus Sample Return Mission, Braxton Brakefield, Rekesh Ali, Andrew Bishop, Shelby Honaker, David Taylor

University of Tennessee Honors Thesis Projects

No abstract provided.


Computer Simulation Of The Attitude Of Lunar Icecube During Early Operations And Deployment, Johnathon F. Fitzpatrick 2017 Morehead State University

Computer Simulation Of The Attitude Of Lunar Icecube During Early Operations And Deployment, Johnathon F. Fitzpatrick

Theses and Dissertations

A Thesis Presented to the Faculty of the College of Science Morehead State University in partial fulfillment of the requirements for the degree of Master of Science by Jonathan F. Fitzpatrick on April 21, 2017.


2u Cubesat Structural Design And Integration, Yevgeniy Byeloborodov 2017 Morehead State University

2u Cubesat Structural Design And Integration, Yevgeniy Byeloborodov

Theses and Dissertations

A thesis presented to the faculty of the College of Science, Morehead State University in partial fulfillment of the requirements for the Degree of Master of Science by Yevgeniy Byeloborodov on April 18, 2017.


A Couplings Approach To Mitigate Unexpected Behaviors In Large Scale Complex Engineering Systems Specifically For The Ares 1 Rocket, Benjamin Giles 2017 Iowa State University

A Couplings Approach To Mitigate Unexpected Behaviors In Large Scale Complex Engineering Systems Specifically For The Ares 1 Rocket, Benjamin Giles

Symposium on Undergraduate Research and Creative Expression

Large-scale complex engineered systems have many components interacting together to impact the end result of the system. However, some interactions of these systems can have unexpected impacts and behaviors on critical functions and thus can lead to the system’s lack of performance or even failure. Catching these unexpected behaviors in the design and development phase of a system can result in saving time, money, and preventing the cancelation of projects altogether. Detecting these impacts early also allows engineers to redesign these components to reduce the negative impact they have on other parts of the system before the development begins ...


Professional Pilot Commercial Off-The-Shelf (Cots) Efb Usage, Policies And Reliability, Tyler A. Babb 2017 Middle Tennessee State University

Professional Pilot Commercial Off-The-Shelf (Cots) Efb Usage, Policies And Reliability, Tyler A. Babb

International Journal of Aviation, Aeronautics, and Aerospace

Electronic Flight Bags (EFBs) have flooded the aviation industry. Commercial off-the-shelf (COTS) tablets are now commonly used by pilots as EFBs. Operators use EFBs for ease of use, faster access to information, to remove weight from the aircraft, and to increase pilots’ quality of life. Identifying trends in EFB usage among professional pilots could benefit operators and universities with flight training programs. EFB policies and procedures may vary among operators but achieve FAA compliance. This study identified these policies and procedures. The types of devices and software vary, and identifying these devices and software could be useful. This research used ...


The Challenges Of Building Intelligent Tutoring Systems For Teams, Desmond Bonner, Stephen B. Gilbert, Michael C. Dorneich, Eliot Winer, Anne M. Sinatra, Anna Slavina, Anastacia MacAllister, Joseph Holub 2017 Iowa State University

The Challenges Of Building Intelligent Tutoring Systems For Teams, Desmond Bonner, Stephen B. Gilbert, Michael C. Dorneich, Eliot Winer, Anne M. Sinatra, Anna Slavina, Anastacia Macallister, Joseph Holub

Michael C. Dorneich

Intelligent Tutoring Systems have been useful for individual instruction and training, but have not been widely created for teams, despite the widespread use of team training and learning in groups. This paper reviews two projects that developed team tutors: the Team Multiple Errands Task (TMET) and the Recon Task developed using the Generalized Intelligent Framework for Tutoring (GIFT). Specifically, this paper 1) analyzes why team tasks have significantly more complexity than an individual task, 2) describes the two team-based platforms for team research, and 3) explores the complexities of team tutor authoring. Results include a recommended process for authoring a ...


Continuous Digital Simulation Of The Second-Order Slowly Varying Wave Drift Force, Bohdan W. Oppenheim, P. A. Wilson 2017 Loyola Marymount University

Continuous Digital Simulation Of The Second-Order Slowly Varying Wave Drift Force, Bohdan W. Oppenheim, P. A. Wilson

Bohdan W. Oppenheim

A discussion is given on practical aspects of digital representation in time of the slowly oscillatory second-order wave drift force from a known force spectrum. The emphasis is placed on the computational efficiency and on the suitability of the simulation to a numerical integration of an equation of motion using a variable integration step size, where the force acts as the excitation of motion. The effect of approximating the original spectrum by a white spectrum is discussed. A sensitivity analysis is made to the range of frequencies of the spectra. The force time record is obtained by first generating at ...


Design And Construction Of An Optimum Method To Present Uncertainty Of Convective Weather Forecasts To Air Traffic Personnel, Anna K. Selchow, Austin Wright 2017 The University of Akron

Design And Construction Of An Optimum Method To Present Uncertainty Of Convective Weather Forecasts To Air Traffic Personnel, Anna K. Selchow, Austin Wright

Honors Research Projects

The purpose of this design project was to develop a new weather display for air traffic controllers to utilize that shows the probabilistic hazard information for convective weather forecasts. Multiple iterations of maps were generated and evaluated for overall effectiveness in conveying uncertainty information for convective weather observations and forecasts with the final maps being tested through interviews with retired air traffic personnel. The goal of these maps was to improve upon current convective weather displays to more accurately show uncertainty and probabilistic hazard information to aid the air traffic controllers (ATCs) in providing guidance for aircraft pilots.


Immersed Boundary Methods For Optimization Of Strongly Coupled Fluid-Structure Systems, Nicholas J. Jenkins 2017 University of Colorado at Boulder

Immersed Boundary Methods For Optimization Of Strongly Coupled Fluid-Structure Systems, Nicholas J. Jenkins

Aerospace Engineering Sciences Graduate Theses & Dissertations

Conventional methods for design of tightly coupled multidisciplinary systems, such as fluid-structure interaction (FSI) problems, traditionally rely on manual revisions informed by a loosely coupled linearized analysis. These approaches are both inaccurate for a multitude of applications, and they require an intimate understanding of the assumptions and limitations of the procedure in order to soundly optimize the design. Computational optimization, in particular topology optimization, has been shown to yield remarkable results for problems in solid mechanics using density interpolations schemes. In the context of FSI, however, well defined boundaries play a key role in both the design problem and the ...


Disrupting Long-Range Polar Order With An Electric Field, Hanzheng Guo, Xiaoming Liu, Fei Xue, Long-Qing Chen, Wei Hong, Xiaoli Tan 2016 Iowa State University

Disrupting Long-Range Polar Order With An Electric Field, Hanzheng Guo, Xiaoming Liu, Fei Xue, Long-Qing Chen, Wei Hong, Xiaoli Tan

Xiaoli Tan

lectric fields are known to favor long-range polar order through the aligning of electric dipoles in relation to Coulomb's force. Therefore, it would be surprising to observe a disordered polar state induced from an ordered state by electric fields. Here we show such an unusual phenomenon in a polycrystalline oxide where electric fields induce a ferroelectric-to-relaxor phase transition. The nonergodic relaxor phase with disordered dipoles appears as an intermediate state under electric fields during polarization reversal of the ferroelectric phase. Using the phenomenological theory, the underlying mechanism for this unexpected behavior can be attributed to the slow kinetics of ...


Cubesat Adcs Validation And Testing Apparatus, Jacob Stevens 2016 Western Michigan University

Cubesat Adcs Validation And Testing Apparatus, Jacob Stevens

Honors Theses

The WALI team at Western Michigan University requested a test environment to validate their CubeSat’s de-tumbling control system and hardware. The test environment required a Helmholtz cage and spherical air bearing. The Helmholtz cage provides an adjustable magnetic field to simulate low earth orbit; the spherical air bearing simulates the friction free environment the CubeSat will experience in space. In conjunction, the two components create an adjustable system that simulates a satellite in low earth orbit.


Development Of Fault Tolerant Adaptive Control Laws For Aerospace Systems, Andres E. Perez Rocha 2016 Embry-Riddle Aeronautical University

Development Of Fault Tolerant Adaptive Control Laws For Aerospace Systems, Andres E. Perez Rocha

Dissertations and Theses

The main topic of this dissertation is the design, development and implementation of intelligent adaptive control techniques designed to maintain healthy performance of aerospace systems subjected to malfunctions, external parameter changes and/or unmodeled dynamics. The dissertation is focused on the development of novel adaptive control configurations that rely on non-linear functions that appear in the immune system of living organisms as main source of adaptation. One of the main goals of this dissertation is to demonstrate that these novel adaptive control architectures are able to improve overall performance and protect the system while reducing control effort and maintaining adequate ...


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