About Me
I have over a decade of industry experience at a university affiliated research center providing expertise on large-scale aerospace projects. For the past year, I have begun a transition into a career focused on software development, with a passion for simulation and analysis of moving mechanical systems, and 3-D design and visualization on novel platforms, including mobile and augmented reality devices. Currently, I am seeking consulting, contracting, or freelance opportunities in an entrepreneurial or startup environment, where I can leverage my unique multidisciplinary skillsets in mechanical and software fields.
Education
Michigan State University
B.S. and M.S. Mechanical Engineering
2004 - 2010
Thesis titled "Development of an Optical Feedback-Controlled Microphone for Aeroacoustics Research"
Technical Skills and Miscellaneous
- Programming: Python, Swift, Kotlin, C#, MATLAB, Mathematica, LabVIEW
- Analysis: NumPy, SciPy, SymPy, Pandas, matplotlib, TensorFlow
- App Development: SwiftUI, Jetpack Compose, Kotlin Multiplatform
- 3-D Rendering: Unity, Blender, RealityKit, SceneKit, Google Filament, Three.js
- Computer Aided Engineering: Abaqus, Simulink, Simscape Multibody, SIMPACK
- Office/Typesetting: Microsoft Office, LaTeX
- Awards: NASA GSRP Fellowship (2008, 2009), Aegis Ballistic Missile Defense Excellence Award (2018)
- Security Clearance: SECRET, active from 2010-2023
Entrepreneurial Experience
DCDC LLC
District of Columbia | Dynamics & Control | Design & Code | Data Analytics & Consulting
December 2023 - Present
DC-Engineer.com
Founder and independent software developer
- Providing mechanical, aerospace, and software engineering services
- Wrote code in Swift, Kotlin, and Python for mobile and multi-platform deployment
- Specialized in creating educational and applied content for engineers, and 3D experiences for mobile and augmented reality devices
- Created a machine learning model in TensorFlow for a client in the video game industry to estimate aerodynamic properties of race cars
The first multibody dynamics app for iOS and Android
MOMDYN provides a native UI that is familiar to engineers and physicists who have studied classical mechanics, with a powerful set of features similar to modern modeling and simulation software. A Python-based numerical equation generation and solving engine provides the scientific backbone for native iOS and Android applications written in Swift and Kotlin.
An augmented reality (AR) version of the Basque tavern game
La Rana is an adaptation of the real-world game where one attempts to toss a coin into the mouth of a brass frog statue. The iOS game is created using the RealityKit framework, with 3D models created using Blender and photogrammetry.
A unit converter designed for engineers
YouKon provides a convenient interface to create databases of engineering properties, and simultaneous conversion to a consistent unit system. The application is created in Jetpack Compose Multiplatform for deployment to iOS and Android from a single code base.
Industry Experience
JHU/APL
The Johns Hopkins University Applied Physics Laboratory
2010 - 2023
Over a decade of experience as a mechanical engineer in the aerospace industry
Dynamics Section Supervisor in the Aerospace and Mechanical Engineering Group (2017-2023)
- Managed 7 professional staff with advanced engineering degrees and research expertise
- Navigated the COVID-19 pandemic with zero furloughs, layoffs, or resignations
- Pursued new business opportunities by building relationships with program management and sponsors
- Coached staff members through the definition and achievement of their personal career objectives
Lead Engineer (2015-2016, 2020-2023)
- Led hardware sustainment & reliability, trajectory simulation, and hardware-in-the-loop teams
- Briefed results of APL analyses to government and industry teams
- Authored documentation describing functionality of critical hardware subsystems
Subject Matter Expert in Structural Dynamics, System Identification, and Propulsion Test & Evaluation
- Developed modal analysis and digital signal processing algorithms in MATLAB and Python
- Created flexible airframe dynamics simulation models using finite element modeling and multibody dynamics software, including Abaqus and SimScape Multibody
- Championed aeroelasticity modeling as a core competency and growth area for the dynamics section
MSU FPaCL
Michigan State University Flow Physics and Control Laboratory
2008 - 2010
Performed aeroacoustics research leading to a journal publication and patent
Graduate Research Assistant
- Developed a feedback-controlled, self-calibrating microphone prototype for aeroacoustics research
- Implemented control system design techniques and evaluated optical displacement sensor technologies
- Published results in a peer reviewed journal article and received a US patent
NASA LaRC
NASA Langley Research Center
2008 - 2010
Received a prestigious Graduate Student Research Program (GSRP) fellowship
GSRP Summer Intern
- Set up a laboratory test to replicate facility used at MSU for validation of microphone prototype concepts
- Collaborated with NASA experts in the fields of acoustical measurement and digital signal processing
- Presented findings to branch and GSRP peer groups
Publications
Journal Article
- E.J. Radcliffe, A.M. Naguib, W.M. Humphreys, “A Novel Design of a Feedback-Controlled Optical Microphone for Aeroacoustics Research,” Measurement Science and Technology, 21, 105208 (2010), https://iopscience.iop.org/article/10.1088/0957-0233/21/10/105208
Patent
- E.J. Radcliffe, A.M. Naguib, W.M. Humphreys, “Acoustic Beam Forming Array Using Feedback-Controlled Microphones for Tuning and Self-Matching of Frequency Response,” US Patent 8,848,942, 30 September 2014, https://ntrs.nasa.gov/api/citations/20150003428/downloads/20150003428.pdf
Conference Proceedings
- E.J. Radcliffe, D.P. Seker, E.Y. Chen, N.N. Horne, J.L. Hill, “Determination of a Predictive Model for Print Quality of Desktop 3D Printers While at Sea,” ASME International Design Engineering Technical Conference, Boston, MA, IDETC-CIE-112599, 20 August 2023, https://doi.org/10.1115/DETC2023-112599
- J.T. Melcher, E.J. Radcliffe, C.S. Butler, B.M. Wheaton, “Effects of Aeroelasticity on Flight Dynamics in the Boundary Layer Transition (BOLT) Experiment,” AIAA Aviation Forum, Chicago, IL, 29 June 2022, https://arc.aiaa.org/doi/abs/10.2514/6.2022-3748
- B.J. Olson, E.J. Radcliffe, R.J. Monroe, B.J. Vidmar, and R.A. Caldwell Jr., “An Inverse Force Identification Methodology for High-fidelity Dynamic Thrust Measurements of Guided Interceptor Missile Divert and Attitude Control Systems,” 17th U.S. National Congress on Theoretical & Applied Mechanics (East Lansing, Michigan), Abstract D-10-402, 2014
- R.N. Couch, E.J. Radcliffe, B.J. Olson, R.A. Caldwell Jr., and B.F. Feeny, “Modal Parameter Identification of a Missile Launcher Structure for Finite Element Model Correlation,” 17th U.S. National Congress on Theoretical & Applied Mechanics (East Lansing, Michigan), Abstract D-10-1180, 2014
- E.J. Radcliffe, A.M. Naguib, W.M. Humphreys, “Design and Characterization of an Optical Feedback Controlled Microphone for Aeroacoustics Research,” 62nd Annual Meeting of the APS Division of Fluid Dynamics, 54 (9), Minneapolis, MN. Nov. 22-24 (2009)