AE Brown Bag Seminar
Friday, March 29
11:00 a.m. -1:00 p.m.
Guggenheim 442
Pizza Served
Cory Chianello
Devin Kelsey
Ezra Keto
Varoon Raghupathi
Harry Shrager
Banglue Wei
Cory Chianello
Title:
A Study of the Effects of Solid-Body Rotation on Turbulence
Abstract:
Turbulence is a phenomenon with inherently complex flow features and apparent randomness. Its characteristics depend on many factors, a less-studied of which is the rotation of the fluid field itself. In order to determine the magnitude of the effect of this solid-body rotation, a production direct numerical simulation code was run on Frontera, one of the top supercomputers in the world. The trends for various flow parameters and flow fluctuation statistics were then plotted and compared for simulations with and without rotation; one of the most important differences is the slowing of the turbulent kinetic energy decay in rotating flows. By understanding the behavior of turbulence under these testing conditions, improved turbulence models can then be formulated.
Faculty Advisor:
Professor P.K. Yeung
Devin Kelsey
Title:
Hardware Design and Simulation Supporting a Magnetic Field Mapper Using Commercial-Off-the-Shelf Components.
Abstract:
Inherent variations in the magnetic flux density of permanent magnetic components present a challenge for research applications that require knowledge of the component’s field beyond that which can be guaranteed by a datasheet. Additionally, characterization of complex arrays or components with unusual geometries is often required. Although commercial mapping platforms are available, these instruments impose a high cost that often exceeds the budget available to many research groups. This presentation documents a low-cost open-source mapping solution prioritizing replicability and ease of use. Particular focus is dedicated to the hardware design, plotting, simulation, and verification portions of this project. The completed instrument successfully characterizes the field about multiple permanent magnets, demonstrating mean error below 1 mT and percent error below 5%, with submillimeter position accuracy.
Faculty advisor:
Professor Álvaro Romero-Calvo
Ezra Keto
Title:
Magnetic Field Mapper Using Commercial off the Shelf Components.
Abstract:
Diverse research endeavors into novel applications of magnetism are the focus of many research efforts, including in aerospace research. Investigations into magnetic materials and the characterization of their independent magnetic field are therefore necessary due to inherent discrepancies in hysteresis-producing coils, manufacturing defects, and other factors that may occur in permanent magnets. The precision made into commercial solutions for measuring the magnetic field of a magnet causes such instruments to be economically prohibitive and may pose a substantial financial hurdle to research in magnetism. In order to present an economical solution to this hurdle, we utilized off-the-shelf components in order to create a magnetic flux density mapping tool. The system integrates a Hall-effect sensor mounted to a commonly used 3D printer with the use of open-source and proprietary software. The results demonstrate the capability of the system, with a standard deviation of less than 1 mT compared to numerical findings and a spatial resolution of 0.1 mm. The total system cost with these results, comes to be under 2,200 USD (FY-2024) which also demonstrates the cost effectiveness of the system for magnetism research applications.
Advisor: Professor Álvaro Romero-Calvo
Varoon Raghupathi
Title:
An Over-the-Air Update System for CubeSats
Abstract:
The VISORS mission is a formation-flying distributed solar telescope mission being spearheaded by Georgia Tech in collaboration with several other institutions. Under the guidance of Dr. Lightsey in the Space Systems Design Lab, the Georgia Tech team is responsible for propulsion, flight software, systems engineering, and assembly/integration for both of the 6U CubeSats. This talk focuses on one of the aspects of the software onboard the mission, specifically the ability to update the software during flight. Since one of the flight computers on each spacecraft is a commercial, off-the-shelf Linux microprocessor, the ability to perform a software update during flight must be implemented from scratch. This talk examines the biggest hurdles and design considerations, the planned implementation, and the risk assesment involved during the entire process.
Faculty Advisor:
Professor Glenn Lightsey
Harry Shrager
Title: Preliminary Design and Analysis of a CubeSat Spacecraft Bus
Abstract:
Green Propellant, Dual Mode (GPDM) is a NASA CubeSat that's designed, integrated, and operated by the Space Systems Design Laboratory. The spacecraft's goal is to test a prototype propulsion system capable of operating both chemical and electrospray thrusters on a common non-toxic monopropellant, called ASCENT. To that end, the spacecraft bus is necessary to house, control, and monitor the propulsion system during operation. In addition, much of the structure will be custom-fabricated by facilities on-campus at Georgia Tech, prompting low-level hardware design of much of the satellite in SolidWorks. Major problems were encountered and solved over the course of design, such as dispenser envelope tolerancing, propulsion system integration, and antenna placement. This seminar will cover the overall process and issues solved over the course of the spacecraft's design phase up to the present.
Faculty Advisor:
Professor Glenn Lightsey
Banglue Wei
Title:
Mars Base Architecture under Model-Based System Engineering
Abstract:
The central purpose of this project is to gain an understanding of the Unified Architecture Framework Enterprise Architecture(UAF EA). To use UAF in an operational context, the project centered around creating a hypothetical enterprise managing a permanent Mars-based research facility. I derived the Mars Base infrastructure from current NASA Artemis plans for a moon settlement. The project’s modeling was based on Magic System of System’s provided UAF EA template, focusing on modeling the central path outlined by a premade process guide. Within each block of the modeling guide, I applied system engineering knowledge from previous Model-Based System Engineering (MBSE) semesters and requirement validation from Space Systems Design. Overall, the modeling process consisted of determining the larger goals of the enterprise, physical steps in meeting those goals, specific systems essential to the enterprise's operation, personnel groups and technology groups to operate the enterprise, and a block diagram of systems and subsystems. Ultimately, the resultant enterprise framework can interface with block diagrams of previously designed systems, showing MBSE can illustrate a system from the business planning stage to the subsystem design and validation stage.
Faculty Advisor:
Dr. Selcuk Cimtalay and Dr. Russell Peak