Research & Publications

Publications

A collection of peer-reviewed journal articles, conference papers, and dissertations spanning spacecraft control, satellite communications, and rehabilitation engineering.

2026

Conference Paper

Fine-Tuning Large Language Models for Nonlinear Dynamics: The Lorenz Attractor as a Benchmark for Hypersonic Simulation

M. Nixon, Ph.D.

AIAA SciTech 2026 Symposium, Orlando, FL

This paper explores the application of fine-tuned large language models to predict nonlinear dynamical systems, using the Lorenz attractor as a benchmark case. The methodology demonstrates potential applications for hypersonic vehicle simulation where traditional numerical methods face computational challenges.

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2025

Workshop Paper

Managing Complexity for LLM Software Co-Pilots Through Abstraction-Aware Context Modeling

B. Dennis, Ph.D., M. Nixon, Ph.D.

AI4SE Workshop - Cognitive Assistants Track

Presents a novel approach to managing software complexity in LLM-based coding assistants through hierarchical context modeling and abstraction-aware prompting strategies. The framework enables more effective code generation and comprehension in large codebases.

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2022

Dissertation

Adaptive Sliding Mode Control of Small Satellites in Formation for Distributed Beamforming Applications

M. E. Nixon

Ph.D. Dissertation, The University of Alabama in Huntsville

This dissertation presents novel adaptive sliding mode control algorithms for maintaining precise relative positioning of satellites in formation flying configurations. The work focuses on distributed beamforming applications where tight formation control is critical for antenna array performance.

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Conference Paper

Robust Adaptive Continuous Spacecraft Formation Control Accounting for Actuator Dynamics

M. E. Nixon and Y. B. Shtessel

Variable Structure Systems

Develops robust adaptive control laws that explicitly account for actuator dynamics in spacecraft formation control. The approach maintains control performance despite actuator limitations and model uncertainties.

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Journal Article

Adaptive Sliding Mode Control of a Perturbed Satellite in a Formation Antenna Array

M. E. Nixon and Y. B. Shtessel

IEEE Transactions on Aerospace and Electronic Systems (Early Access)

Presents an adaptive sliding mode control approach for satellites operating within formation antenna arrays. The controller handles perturbations and uncertainties while maintaining the precise positioning required for coherent beamforming operations.

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2021

Conference Paper 2021 AIAA Best Paper Award

Adaptive double-layer continuous super-twisting control of a satellite formation

M. E. Nixon and Y. B. Shtessel

AIAA SciTech 2021 Forum, Nashville, TN (Virtual)

Introduces a double-layer super-twisting control architecture for satellite formation flying that provides continuous control signals while maintaining robustness to disturbances. This work received recognition for its innovative approach to formation control.

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Conference Paper

Reduced Control Authority in a Dispersed Satellite Formation Antenna Array

M. Nixon and Y. Shtessel

31st AAS/AIAA Space Flight Mechanics Meeting, Charlotte, NC

Analyzes the effects of reduced control authority on satellite formation maintenance in distributed antenna array configurations. The study provides guidance for mission designers on minimum thruster requirements for various formation geometries.

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Conference Paper

Developing a Multilingual Auto-coding Interface Control for the MAVERIC-II Dynamics Simulator

M. Nixon

Interservice/Industry Training, Simulation and Education Conference (I/ITSEC), Orlando, FL

Describes the development of a multilingual programming interface for the MAVERIC-II dynamics simulator, enabling researchers to interface with the simulation environment using multiple programming languages for enhanced flexibility and accessibility.

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2019

Conference Paper

Robust Attitude Control for a Rigid Body Spacecraft

M. E. Nixon and J. Schofield

IEEE SoutheastCon

Presents robust attitude control algorithms for rigid body spacecraft that maintain stability and tracking performance in the presence of modeling uncertainties and external disturbances.

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2018

Conference Paper

ACES RED Experiment #1 Environmental Test Results for Industrial Grade, Non-traditional, and Other Components Lacking Flight Heritage

M. Nixon, C. Duron, J. Hilliard, E. Becnel, G. Day, J. Gould, J. Shrontz, E. Swinney, A. Webb, and E. Neilson

32nd Annual AIAA/USU Conference on Small Satellites, Logan, UT

Reports environmental test results for commercial and industrial-grade components evaluated for potential use in small satellite applications. The ACES RED experiment provides valuable data for spacecraft designers considering non-traditional parts.

Conference Paper

Kestrel Eye Block II

K. J. Bocam, K. J. Hyatt, J. Stephen, D. D. Risaliti, K. Arroyo-flores, F. Eckert, G. Gallant, G. E. Cameron, S. J. Fujikawa, W. K. Hardy, M. E. Ray, C. J. Reyes, M. A. Hitt, and M. E. Nixon

32nd Annual AIAA/USU Conference on Small Satellites

Describes the Kestrel Eye Block II small satellite mission, a technology demonstration for low-cost Earth observation. The paper covers system design, development, and mission objectives for this innovative CubeSat-class imaging satellite.

2017

Conference Paper

Army Cost Efficient Spaceflight Research Experiments and Demonstrations Attitude Determination Experiment

M. Nixon, B. Holden, T. Taylor, J. Smith, J. Shrontz, E. Swinney, A. Webb, J. Gould, M. Benfield, and M. Turner

31st Annual AIAA/USU Conference on Small Satellites, Logan, UT

Presents the attitude determination experiment conducted as part of the ACES RED mission. The paper details sensor configurations, algorithm implementations, and on-orbit performance results for low-cost attitude determination approaches.

Conference Paper

Tactical Ka-band MIL-SATCOM Using LEO Small Satellites

M. E. Ray, M. E. Nixon, J. R. London III, T. Newton, D. Reuster, M. Hicks, J. Watkins, and T. Cook

IEEE International Microwave Symposium, Honolulu, HI

Explores the use of LEO small satellites for tactical Ka-band military satellite communications. The paper analyzes link budgets, constellation architectures, and operational concepts for providing persistent tactical communications coverage.

Conference Paper

Evolution and Maturation of Small Space Microwave Technologies for U.S. Army Applications

M. E. Nixon, M. E. Ray, and J. R. London III

IEEE International Microwave Symposium, Honolulu, HI

Reviews the development and maturation of microwave technologies for small satellite applications within U.S. Army programs. The paper traces technology evolution from early demonstrations to operational capabilities.

2016

Conference Paper

U.S. Army Small Space Update

B. E. Johnson, J. T. Dodson, T. A. Farmer, R. Technologies, W. K. Hardy, B. W. Heflin, M. G. Klinner, J. R. London III, K. E. Mott, M. E. Nixon, M. E. Ray, T. S. Taylor, B. M. Urena, D. J. Weeks, and M. F. Lindsey

30th Annual AIAA/USU Conference on Small Satellites, Logan, UT

Provides a comprehensive update on U.S. Army small satellite programs, including technology demonstrations, operational missions, and future plans. The paper highlights lessons learned and technology advancements across multiple programs.

2013

Conference Paper

Applying gaming principles to virtual environments for upper extremity therapy games

M. E. Nixon and A. M. Howard

IEEE International Conference on Systems, Man, and Cybernetics

Investigates the application of gaming principles to virtual rehabilitation environments for upper extremity therapy. The research explores how game mechanics can improve patient engagement and therapeutic outcomes.

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Conference Paper

Quantitative evaluation of the Microsoft Kinect for use in an upper extremity virtual rehabilitation environment

M. E. Nixon, A. M. Howard, and Y.-P. Chen

International Conference on Virtual Rehabilitation, Philadelphia, PA

Presents a quantitative evaluation of the Microsoft Kinect sensor for tracking upper extremity movements in virtual rehabilitation applications. The study assesses accuracy, precision, and suitability for therapeutic motion tracking.

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Master's Thesis

Utilization of Auditory Cues to Enhance Therapy for Children with Cerebral Palsy

M. E. Nixon

M.S. Thesis, Georgia Institute of Technology

This thesis investigates the use of auditory feedback and cues in rehabilitation therapy for children with cerebral palsy. The research develops and evaluates a system that provides audio feedback to guide and encourage therapeutic movements.

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2012

Conference Paper

Fostering Undergraduate Research through a Student Projects and Research Club

T. Roppel, R. M. Nelms, L. Smolin, and M. Nixon

ASEE Southeast Section Conference, Starkville, MS

Describes an initiative to encourage undergraduate research participation through a student-led projects and research club. The paper presents the club structure, activities, and outcomes in fostering early research experiences.