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Now showing items 31-40 of 101
Evaluation of Cooperative Navigation Strategies with Maneuvering UAVs
(2021-07-27)
This thesis presents and evaluates cooperative navigation methods used to reduce navigation solution error growth between members of an unmanned aerial vehicle - unmanned ground vehicle (UAV-UGV) or all-UAV team when Global ...
Utilizing Hidden Markov Models to Classify Maneuvers and Improve Estimates of an Unmanned Aerial Vehicle During High Dynamic Flight
(2021-07-28)
Unmanned Aerial Vehicles (UAVs) are an increasing presence around the world; however, they can pose a threat to secure facilities. Many UAV mitigation techniques require accurate knowledge of UAV states to successfully ...
Study of the Effect of Mechanical Cycling on the Constitutive Behavior of Lead-Free Solders
(2021-08-05)
Solder joints in electronic assemblies are often subjected to cyclic (positive/negative) mechanical strains and stresses. Such exposures can occur in variable temperature application environments or during accelerated life ...
Online Rotational Self-Calibration of LiDAR Sensors when Mounted on a Ground Vehicle
(2021-08-06)
This thesis presents a method for online extrinsic rotational calibration of a LiDAR sensor
with minimal manual intervention. The approach leverages the expected geometry of structured
environments common to ground ...
A GPS L5 Software Defined Vector Tracking Receiver
(2021-08-11)
As the world continues towards autonomy, the need for continuous, precise, and robust navigation is becoming increasingly important. A new wave of modernized Global Navigation Satellite Systems (GNSS) signals are currently ...
Mechanical Behavior and Microstructural Evolution of SAC and SAC+Bi Solder Alloys in Harsh Environment Applications
(2021-08-16)
The microstructure and mechanical properties of lead free solder joints in electronic assemblies are constantly evolving when exposed to isothermal aging. These changes lead to dramatic reductions in reliability of lead ...
A Multiscale Investigation of the Fatigue Behavior of Additively Manufactured Nickel Superalloys
(2021-11-15)
Fatigue as the most frequent mode of failure among mechanical systems has been the focus of a large part of the research community. Modern manufacturing technologies are developed to address the need for complex geometries ...
Charging strategy considering subzero temperature based on electrochemical-thermal life model for lithium-ion batteries
(2021-12-06)
In order to overcome range anxiety of electric vehicles (EVs) powered by lithium-ion batteries, more batteries are installed to increase battery capacity, which results in a long charging time that is one of the most ...
A Numerical and Experimental Study of Additively Manufactured Compact Cold Plates for Electronics Cooling Applications
(2021-12-03)
This research assesses the viability of metal Additive Manufacturing (AM) to create Compact Cold Plate Heat Exchangers. Unique arrays of offset strip fins were used to increase heat transfer and reduce pressure drop. Cold ...
Modal and Impact Analysis of Fluid-Structure Interaction by Finite Element Methods.
(2021-12-01)
In this work, the modal and impact interactions of fluid-filled cylindrical structures are studied. The first part of the study focuses on the parametric modal analysis of fluid-coupled thin structures. This study emphasizes ...