Browsing by Author "Bevly, David"

Now showing items 1-20 of 106

An Adaptive Control System for an Accelerating Rotor Supported by Active Magnetic Bearings under Unbalance Disturbances

Wang, Xianglin (2017-10-12)

This thesis describes an adaptive control system capable of rejecting unbalance disturbances for an accelerating rotor supported by active magnetic bearings (AMBs). The control of accelerating rotor during start-up and ...

Adaptive Steering Actuator Delay Compensation for a Vehicle Lateral Control System

Kennedy, William (2023-05-01)

This thesis presents an adaptive control algorithm for steering actuator delay compensation in a ground vehicle lateral control system. Unknown and time-varying actuator delay values are considered. Many active safety ...

Ambiguous Energy Suppression in Encryption Derived Pseudo-Random BPSK Radar Signals

Kamrath, Luke (2021-12-01)

In this thesis, a pseudo-random binary phase shift keying (BPSK) radar signal is developed using Advanced Encryption Standard (AES-192). The primary objective of this encryption based BPSK (E-BPSK) signal is to provide a ...

Analysis of Record and Playback Errors of GPS Signals Caused by the USRP

Hennigar, Andrew (2014-12-10)

In this thesis, the errors created by the USRP (Universal Software Receiver Platform) during record and playback are analyzed. The USRP is used for jamming, spoo fing, and GPS processing, and has recently become widely ...

Analysis of Simulated Performance of Integrated Vector Tracking and Navigation Loops for GPS

Hamm, Christopher (2005-12-15)

An alternative GPS signal tracking method that uses an extended Kalman-Bucy filter in place of traditional independent, parallel tracking loops is presented in this thesis. Furthermore, this method is extended into a ...

Classification of Ego Platform Motion for Platform Independent Plug and Play Navigation

Ryan, Jonathan (2016-05-05)

This dissertation presents a method of using these kinematic constraints without requiring this apriori knowledge of the application platform. The method is termed ``joint navigation and classification'' (JNC), and involves ...

Closely Coupled GPS/INS Relative Positioning For Automated Vehicle Convoys

Martin, Scott (2011-04-15)

In this thesis, differential GPS methods are developed for use in automated vehicle convoy positioning. The GPS pseudorange and carrier phase measurements are used to compute relative position vectors between two vehicles ...

Collaborative Architectures for Relative Position Estimation of Ground Vehicles with UWB Ranging and Vehicle Dynamic Models

Jones, Benjamin (2022-12-09)

The relative position to neighboring vehicles is critical to ongoing autonomy efforts including collision avoidance and path planning; therefore, it should not be fully dependent on an external reference such as GPS. ...

Collaborative Simultaneous Tracking and Navigation with Low Earth Orbit Satellite Signals of Opportunity and Inertial Navigation System

Thompson, Sterling (2022-07-26)

This thesis has not been approved for public release.

A Computational Fluid Dynamics Analysis of a Driver-Assistive Truck Platooning System with Lateral Offset

Humphreys, Hugh (2017-04-17)

This study utilizes Computational Fluid Dynamics to analyze the aerodynamic drag performance of a two-truck Driver-Assistive Truck Platooning system. Simulations were conducted to characterize the drag reduction versus ...

Computer Vision Based Cooperative Navigation for UAVs and Ground Vehicles

Kamrath, Daniel (2022-06-30)

This thesis is not approved for public release.

Controlling the Speed of a Magnetically-Suspended Rotor with Compressed Air

Jantz, Robert (2011-04-08)

Magnetic bearing research is generally concerned with the development of the automatic control systems required to levitate a rotor, driven by either an electric motor or air turbine. The regulation of rotor speed in ...

Coupling GPS/INS and IMM Radar Tracking Algorithms for Precise Collaborative Ground Vehicle Navigation

Selikoff, Joseph (2018-12-07)

This thesis describes a method of collaborative ground vehicle navigation utilizing shared radar data to provide observations during periods of GPS degradation. Navigational errors that typically arise from degraded GPS ...

Decentralized Collaborative Navigation in Limited Observability Environments with Low Earth Orbit Satellite Signals of Opportunity between Aerial and Ground Vehicles

Moomaw, Christian (2023-07-28)

A decentralized collaborative navigation algorithm known as inverse covariance intersection (ICI) is studied in the context of a group of vehicles navigating using opportunistic Doppler measurements. Signals of opportunity ...

Deep Integration of a Flight Vehicle Dynamic Model in a Vector Tracking Software Defined Receiver

Miller, Noah (2024-01-04)

The greater occurrence of signal interference on Global Navigation Satellite Systems (GNSS) requires additional alternative navigation solutions to provide robust, reliable localization of flight vehicles when measurements ...

Design and Development of a GPS Intermediate Frequency and IMU Data Acquisition System for Advanced Integrated Architectures

Newlin, Michael (2006-12-15)

Advanced levels of GPS and INS integration, including Deeply Integrated and Ultra- Tightly Coupled, have been reported to provide significant gains in anti-jamming capa- bility and reduced susceptibility to loss of GPS ...