Deployable Solar Array Structure: G1:3, 2019 Kennesaw State University
Deployable Solar Array Structure: G1:3, Daniel Bain, Craig Patton, Andrew Tendean
Senior Design Project For Engineers
This design project is in response to an AIAA RFP (Request-For-Proposal) to build a compact, durable, non-hinged solar array to be deployed from a spacecraft on its way from the Earth to Mars. The solar array structures are used to provide the continual supply of power to operate onboard equipment. A large array will be required but must fit within the fairing of the launch vehicle. Origami principles will be utilized to fit the given constrained stored volume of 10 cm3 while satisfying the power requirements and avoiding structural complications due to tight folds.
Extreme Altitude Search And Rescue Helicopter, 2019 Kennesaw State University
Extreme Altitude Search And Rescue Helicopter, Matthew J. De Sieno, Anthony Chavarria, David Stuver, Zach Boss
Senior Design Project For Engineers
The goal of this design was to develop an extreme altitude rescue helicopter capable of retrieving hikers stranded on top of Mount Everest. Using the Eurocopter AS350 as a baseline, a conceptual model was produced that is fully capable of hovering and delivering forward flight at the desired altitude of 8,848 meters. Combined blade element momentum theory, proper airfoil selection, and forward flight calculations were utilized in order to optimize the rotor for the given flight conditions on top of Mount Everest. Conceptual fluid dynamics and CAD modeling aided in the process of visually designing the fuselage and rotor ...
Unmanned Aerial Power Line Surveillance Drone, 2019 Kennesaw State University
Unmanned Aerial Power Line Surveillance Drone, Brock Arp, Wade Vine, Cameron Whigham, Lorenzo Stewart
Senior Design Project For Engineers
The purpose of our project is to provide power line workers and linemen with a safe way to inspect the power lines. Our Aircraft is an UAV that is capable of surveying 200 linear miles in a normal working shift. The aircraft will be launched/landed and operated from an F-150 pickup truck with a facilitated launch mechanism attached. The aircraft must maintain an altitude of 150-400 ft. It will be recovered via net that will extend from the truck as the plane comes in for a landing, This will eliminate the need for landing gear. The goal for this ...
Adaptive And Supertwisting Adaptive Spacecraft Orbit Control Around Asteroids, 2019 Catholic Kwandong University
Adaptive And Supertwisting Adaptive Spacecraft Orbit Control Around Asteroids, Keum W. Lee, Sahjendra N. Singh
Electrical and Computer Engineering Faculty Publications
This paper addresses the development of control systems for the orbit control of spacecraft around irregularly shaped rotating asteroids with uncertain parameters. The objective is to steer the spacecraft along prescribed orbits. First, a nonlinear adaptive law for orbit control was designed. This was followed by the design of a supertwisting adaptive (STWA) control system. In the closed-loop system, which includes the adaptive law or the STWA law, all the signals remain bounded, and the trajectory tracking error asymptotically converges to zero for any initial condition. Finally, under the assumption of boundedness of the derivative of the uncertain functions of ...
Thermal Management Design Tool System For Cubesat Applications, 2019 Morehead State University
Thermal Management Design Tool System For Cubesat Applications, Siakrishna Reddy Kanumuru
Morehead State Theses and Dissertations
A thesis presented to the faculty of the College of Science at Morehead State University in partial fulfillment of the requirements for the Degree of Master of Science by Saikrishna Reddy Kanumuru on April 26, 2019.
Using A Balloon-Launched Unmanned Glider To Validate Real-Time Wrf Modeling, 2019 University of Kentucky
Using A Balloon-Launched Unmanned Glider To Validate Real-Time Wrf Modeling, Travis J. Schuyler, S. M. Iman Gohari, Gary Pundsack, Donald Berchoff, Marcelo I. Guzman
Chemistry Faculty Publications
The use of small unmanned aerial systems (sUAS) for meteorological measurements has expanded significantly in recent years. SUAS are efficient platforms for collecting data with high resolution in both space and time, providing opportunities for enhanced atmospheric sampling. Furthermore, advances in mesoscale weather research and forecasting (WRF) modeling and graphical processing unit (GPU) computing have enabled high resolution weather modeling. In this manuscript, a balloon-launched unmanned glider, complete with a suite of sensors to measure atmospheric temperature, pressure, and relative humidity, is deployed for validation of real-time weather models. This work demonstrates the usefulness of sUAS for validating and improving ...
Design Of A Thrust Stand For Electric Propulsion, 2019 Western Michigan University
Design Of A Thrust Stand For Electric Propulsion, Hannah Watts
Thrust stands are the industry standard device for measuring the low levels of thrust generated by electric propulsion devices. Western Michigan University’s Aerospace Laboratory for Plasma Experiments is home to several electric propulsion devices and is in the process of obtaining a pulsed plasma thruster in partnership with the Western Aerospace Launch Initiative. The lab currently has no way of measuring the true thrust force generated by these devices. A thrust stand has been designed specific to the micro-Newton thrust range and the constraints inherent to the facilities in which it will operate.
Thermal Adaptation Of A Vacuum Chamber, 2019 Western Michigan University
Thermal Adaptation Of A Vacuum Chamber, Jacob Russell
The process of adapting a preexisting vacuum chamber to perform thermal vacuum testing is a rare process in the testing industry. A closed vacuum system that was designed without thermal capacitance in mind will hinder the development of additional thermal system capabilities and prove difficult from a cost standpoint. Generally, building a thermal vacuum system from scratch will cost on the order of $10,000 to $100,000 depending on the system requirements regarding control and thermal capacitance within the chamber. This project will explore the cost of such an adaptation, attempting to minimize expense, and potentially provide the “Western ...
Water Walking As A New Mode Of Free Surface Skipping, 2019 Utah State University
Water Walking As A New Mode Of Free Surface Skipping, Randy C. Hurd, Jesse Belden, Allan F. Bower, Sean Holekamp, Michael A. Jandron, Tadd T. Truscott
Mechanical and Aerospace Engineering Faculty Publications
Deformable elastomeric spheres are evaluated experimentally as they skip multiple times over a lake surface. Some spheres are embedded with small inertial measurement units to measure the acceleration experienced during water surface impact. A model for multiple impact events shows good agreement between measured acceleration, number of skipping events and distanced traveled. The experiment reveals a new mode of skipping, “water walking”, which is observed for relatively soft spheres impacting at low impact angles. The mode occurs when the sphere gains significant angular velocity over the first several impacts, causing the sphere to maintain a deformed, oblong shape. The behavior ...
Autonomous Watercraft Simulation And Programming, 2019 Lynchburg College
Autonomous Watercraft Simulation And Programming, Nicholas J. Savino
Student Scholar Showcase
Automation of various modes of transportation is thought to make travel more safe and efficient. Over the past several decades, advances to semi-autonomous and autonomous vehicles have led to advanced autopilot systems on planes and boats, and an increasing popularity of self-driving cars. We predicted the motion of an autonomous vehicle using simulations in Python. The simulation models the motion of a small scale watercraft, which can then be built and programmed using an Arduino Microcontroller. We examined different control methods for a simulated rescue craft to reach a target. We also examined the effects of different factors, such as ...
Model-Assisted Validation Of A Strain-Based Dense Sensor Network, 2019 Iowa State University
Model-Assisted Validation Of A Strain-Based Dense Sensor Network, Jin Yan, Xiaosong Du, Simon Laflamme, Leifur Leifsson, Chao Hu, An Chen
Recent advances in sensing are empowering the deployment of inexpensive dense sensor networks (DSNs) to conduct structural health monitoring (SHM) on large-scale structural and mechanical systems. There is a need to develop methodologies to facilitate the validation of these DSNs. Such methodologies could yield better designs of DSNs, enabling faster and more accurate monitoring of states for enhancing SHM. This paper investigates a model-assisted approach to validate a DSN of strain gauges under uncertainty. First, an approximate physical representation of the system, termed the physics-driven surrogate, is created based on the sensor network configuration. The representation consists of a state-space ...
Surrogate Modeling Of Ultrasonic Nondestructive Evaluation Simulations, 2019 Iowa State University
Surrogate Modeling Of Ultrasonic Nondestructive Evaluation Simulations, Jacob Siegler, Leifur Leifsson, Robert Grandin, Slawomir Koziel, Adrian Bekasiewicz
Ultrasonic testing (UT) is used to detect internal flaws in materials or to characterize material properties. Computational simulations are an important part of the UT process. Fast models are essential for UT applications such as inverse design or model-assisted probability of detection. This paper presents investigations of using surrogate modeling techniques to create fast approximate models of UT simulator responses. In particular, we propose to use data-driven surrogate modeling techniques (kriging interpolation), and physics-based surrogate modeling techniques (space mapping), as well a mixture of the two approaches. These techniques are investigated for two cases involving UT simulations of metal components ...
Scale Interactions Within A Perturbed Plane Wall Jet, 2019 Embry-Riddle Aeronautical University
Scale Interactions Within A Perturbed Plane Wall Jet, Shibani Bhatt
Dissertations and Theses
The current work focuses on exploiting this behavior to manipulate wall turbulence by targeting the large-scales of the flow. In wall turbulence the large-scales of the flow interact with the smaller scales in a non-linear manner including through a process of amplitude and frequency modulation. A plane wall jet (PWJ) is chosen as the model flow field for this work as its unique geometry allows for the controlled introduction of large-scale perturbations through acoustic forcing. The corresponding interactions because of forcing are characterized using single hot-wire measurements. The nearwall response of the PWJ over a range of large-scale forcing showed ...
Geometric Effects Of Thermal Barrier Coating Damage On Turbine Blade Temperatures, 2019 Embry-Riddle Aeronautical University
Geometric Effects Of Thermal Barrier Coating Damage On Turbine Blade Temperatures, Shane Colon
Dissertations and Theses
Thermal barrier coatings (TBC) found on turbine blades are a key element in the performance and reliability of modern gas turbines. During the life of the turbine components, the TBC surface may be damaged due to manufacturing imperfections, handling damage, service spalling, or service impact damage, producing chips in the coating. While a chip in the TBC coating is expected to cause an increase in airfoil temperature, it is unknown to what degree the blade will be affected and what parameters of the chip shape affect this result. The goal of this preliminary study is to identify the major driving ...
Non-Linear Bending Analysis Of Functionally Graded Beams With Spring Constraints And Thermal Effects, 2019 Embry-Riddle Aeronautical University
Non-Linear Bending Analysis Of Functionally Graded Beams With Spring Constraints And Thermal Effects, Swetha Suresh
Dissertations and Theses
No abstract provided.
Uncover The Power Of Multipath : Detecting Nlos Drones Using Low-Cost Wifi Devices, 2019 Embry-Riddle Aeronautical University
Uncover The Power Of Multipath : Detecting Nlos Drones Using Low-Cost Wifi Devices, Ashok Vardhan Raja
Dissertations and Theses
In recent years, consumer UAV technology has seen considerable advances. Consumer UAVs have become an ideal vector for privacy invasions due to their affordability, size, maneuverability, and their ability to stream live high-quality video. There is considerable proliferation of drones in both civil and military domains. Hence it is critical to detect invading unmanned aerial vehicles (UAVs) or drones in a timely manner for both security and safeguarding privacy. Currently available solutions like active radar, video or acoustic sensors are very expensive (especially for individuals) and have considerable constraints (e.g., requiring visual line of sight).
Recent research on drone ...
Model Predictive Control Synthesis For The Innovative Control Effector Tailless Fighter Aircraft, 2019 Western Michigan University
Model Predictive Control Synthesis For The Innovative Control Effector Tailless Fighter Aircraft, Christopher Proctor
A nonlinear model predictive control law was developed for the Lockheed Martin Innovative Control Effector tailless fighter aircraft to track way points. In general, aircraft are described by nonlinear dynamics that are dependent on the regime of flight. Additionally strict requirements on state and actuator constraints are common to all aircraft. Tailless aircraft are usually overdetermined systems, meaning solutions to control problems are not unique, and the system is non-affine. The proposed nonlinear control law considers those constraints during run-time, and solves the nonlinear control problem for a range of points within different flight regimes. The control law was developed ...
Control Law Synthesis For Lockheed Martin’S Innovative Control Effectors Aircraft Concept, 2019 Western Michigan University
Control Law Synthesis For Lockheed Martin’S Innovative Control Effectors Aircraft Concept, Cameron James Segard
This thesis documents a conventional and modern flight control system design process carried out on a tailless aircraft Simulink model with innovative control effectors provided by Lockheed Martin. To set scope and design requirements a performance analysis was carried out to categorize the aircraft. Evaluation of open-loop dynamics reveled modal instabilities as well as state and control coupling. Flight condition dependent pole migration mapping reveled large changes in the aircraft’s static stability. Leading to the development of a four channel proportional-integral- derivative (PID) stability and control augmentation system (SCAS) controlling pitch-rate, roll-rate, side-slip angle, and airspeed states. PID gains ...
Characterization And Optimization Of A Propeller Test Stand, 2019 Old Dominion University
Characterization And Optimization Of A Propeller Test Stand, Colin Bruce Leighton Benjamin
Mechanical & Aerospace Engineering Theses & Dissertations
In recent history, there has been a rapid rise in the use of drones, and they are expanding in popularity each year. The widespread use and future capabilities of these unmanned aerial vehicles (UAVs) will call for increased study and classification of propellers to maximize their performance. As a result, it is necessary to have continuity in the development, maximization, and optimization of propeller test stand’s capability to collect accurate and precise measurements. It is of significant advantage to have the capability of accurately characterizing a propeller based on its thrust and torque. In this study, a propeller test ...
Algorithm For Geodetic Positioning Based On Angle-Of-Arrival Of Automatic Dependent Surveillance-Broadcasts, 2019 Grand Valley State University
Algorithm For Geodetic Positioning Based On Angle-Of-Arrival Of Automatic Dependent Surveillance-Broadcasts, Richard Allen Gross
This paper develops a non-precision, three-dimensional, geodetic positioning algorithm for airborne vehicles. The algorithm leverages the proliferation of Automatic Dependent Surveillance – Broadcast (ADS-B) equipped aircraft, utilizing them as airborne navigation aids to generate an RF Angle-of-Arrival (AOA) and Angle-of-Elevation (AOE) based geodetic position. The resulting geodetic position can serve as a redundant navigation system for use during locally limited Global Navigation Satellite System (GNSS) availability, be used to validate on-board satellite navigation systems in an effort to detect local spoofing attempts, and be used to validate ADS-B position reports.
The navigation algorithm is an implementation of an Extended Kalman Filter ...