Personal Projects
2018-2019 Design/Build/Fly
I worked as the structures team-lead for the USU 2018-2019 Design/Build/Fly capstone project. The aircraft was required to fold its wings to fit within a 3' span, carry deployable stores, and take-off from a 10' long ramp. Our final design was built from balsa, MonoKote, and carbon fiber spars/booms. Some of the largest challenges of this project included:
Airframe size and weight, largely due to battery weight (LiPo batteries weren't allowed yet)
Take-off and landing a 22 lb. airplane
Developing foldable and deployable wings
Manufacturing design iterations for testing and development (3 prototype and 2 competition)
The structures team was responsible for designing, testing, and manufacturing a reliable airframe that was capable of meeting the aerodynamic and propulsion requirements set by the project.
Competition Design
Our final design was built from more than 300 laser cut and 3D printed parts. It took almost two weeks to manufacture. The wing-folding was achieved through a servo-driven 3D printed wing root section with a single pivot point (inspired by the TBF/TBM Avenger).
We competed in the 2019 AIAA DBF competition in Tucson, Arizona. We placed 14th out of 104 teams in the design report, completed the ground mission and aircraft design requirements, but unfortunately crashed at the end of the first flight mission.
Flight Simulation
Through my education and research I have worked on a few different flight simulation projects. This work includes both the development of my own Python based flight simulator and integration with the open-source FlightGear flight simulator. Some of the concepts I have learned through this work include:
Six DOF equations of motion and alternate methods of formulation
The Euler-Rodrigues quaternion formulation and quaternion algebra
Numerical integration of the quaternion formulation
Control input response, nonlinear aerodynamic effects, and inertial and gyroscopic coupling
Flight SIM integration with hardware systems for complete system demonstration
Python Based Physics and Graphics Project
As part of the Aircraft Dynamics and Flight Simulation course at USU, we were required to add additional phsyics and graphics elements to our flight simulator. I developed my flight simulator into an RC flight simulator with these modifications:
Additional pilot view angles and options
Aircraft and object interference
Landing forces and aircraft shadow tracking
Visual elements for an RC field runway, sky, trees, and pilot station
GitHub project: https://github.com/Troy-AAbraham/RC-Flight-Simulation
Airfoil Analysis - Vortex Panel Method
I developed a set of inviscid airfoil analysis tools that includes both a vortex panel method and conformal mapping techniques. Either a NACA 4 digit series airfoil or points defining the shape of an airfoil can be provided.
GitHub project: https://github.com/Troy-AAbraham/Airfoil-Analysis
Wing Design/Analysis - Lifting Line Theory
I developed a Python based implementation of classical lifting line for wing design and analysis. This tool can model the effects of planform, twist, and aileron distributions.
GitHub project: https://github.com/Troy-AAbraham/Lifting-Line-Analysis