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Multi-insect visual tracking and system identification techniques for inflight feedback interaction analysis
(2021-07)
Individual insects flying in crowded assemblies perform complex aerial maneuvers by small changes in their wing motions. To understand the individual feedback rules that permit these fast, adaptive behaviors in group flight, ...
Impact properties of AISI 316L stainless steel repaired by Directed Energy Deposition (DED) additive manufacturing process
(2019-12)
Directed Energy Deposition (DED) is considered as one of the potential processes for metallic structural repairs. In this work, the impact properties of the repaired stainless steel 316L were investigated. The repair was ...
Investigation of lightweight concepts for low-frequency performance enhancement in acoustic liners
(2021-05)
Acoustic liners are extensively used to reduce noise emitted by aircraft engines. However, conventional acoustic liners are largely ineffective for low-frequency noise content (<~1000 Hz) due to impractical mass and volume ...
Near Wall Structure and Deviation from Equilibrium in Wavy Channel Turbulence
(2019-07)
The structure of turbulent flow over non-flat surfaces is a topic of major interest in practical applications in both engineering and geophysical settings. A lot of work has been done in the fully rough regime at high ...
Electrode erosion of an electrical discharge machining drill for aerospace fastener removal
(2020-05)
This paper presents an examination of an electrical discharge machining hand drill system for aerospace fastener removal purposes to define secondary level influence of cut depth, electrode diameter, and fastener material ...
Quadcopter Trajectory Prediction and Wind Estimation Using Machine Learning
(2019-07)
Small unmanned aerial systems are heavily impacted by wind disturbances. Wind causes deviations from desired trajectories, potentially leading to crashes. In this thesis, we consider two inherently related problems: ...
Experimental observation of boundary layer and movement of topographically varying desert dunes with unmanned systems
(2022-12)
Desert dunes offer unique geophysical interactions, and these eolian dominant interactions occur over a significant portion of earth surfaces. There are multiple factors that determine the direction and shape of these ...
Identification of physical processes via data driven methods
(2020-05)
Extracting governing equations from data can be viewed as reverse engineering of Nature- using data to identify the physical laws/models. This approach is crucial for fields where data is abundant ( such as geophysical ...
Data-driven sparse estimation of nonlinear fluid flows
(2020-05)
Estimation of full state fluid flow from limited observations is central for many practical applications in physics and engineering science. Fluid flows are manifestations of nonlinear multiscale partial differential ...
Development of a software in the loop simulation approach for risk mitigation in unmanned aerial system development
(2020-12)
A common method to reduce risk during the development of new designs is simulation and estimation. The extent to which these simulation and estimation techniques can be relied upon for small Unmanned Aerial Systems (sUAS) ...