Browsing by Author "Bevly, David"

Now showing items 41-60 of 106

GPS Multipath Detection and Mitigation Timing Bias Techniques

Preston, Sarah (2015-05-08)

In this thesis, timing-based methods of multipath mitigation and detection are developed. GPS pseudorange measurements are used to calculate a receiver's position and timing bias, which is a measurement of the di erence ...

GPS/INS Operation in Shadowed Environments

Clark, Benjamin (2008-08-15)

This thesis presents the analysis techniques developed for monitoring GPS signals in harsh shadowed environments such as heavy foliage. It also details a method selected for improved performance by combining raw GPS ...

Graph-Based Relative Path Estimation Using Landmarks for Long Distance Ground Vehicle Following

Pierce, Dan (2022-12-08)

This dissertation presents a graph-based sensor fusion framework for the localization of automated ground vehicles for leader-follower path duplication. A specific focus is given to scenarios where the following distance ...

High-Dynamic Range Collision Detection using Piezoelectric Polymer Films for Planar and Non-planar Applications

Wooten, James Michael (2013-07-10)

This thesis develops a large area collision detection system utilizing the piezoelectric ef- fect of polyvinylidene fluoride film. Complex high speed autonomous articulations associated with modern large-scale high ...

Improving Magnetic Map-Based Navigation using Vehicle Motion Information

McWilliams, Ryan (2022-01-06)

This thesis utilizes the earth's main magnetic field as the signal for a map definition, implements a particle filter to synthesize a solution from likelihood information, and introduces vehicle motion information by means ...

Improving Semi-autonomous Unmanned Ground Vehicle Operator Performance via Haptics

Stubbs, Chandler (2023-04-26)

This thesis has not been approved for public release.

Incorporation of a Foot-Mounted IMU for Multi-Sensor Pedestrian Navigation

Pierce, Daniel (2016-04-29)

This thesis deals with pedestrian localization by way of multi-sensor fusion. A special focus is made on the use of a foot-mounted inertial measurement unit (IMU) and its incorporation into other pedestrian navigation ...

Initialization of a Pedestrian Navigation System Using a Transfer Alignment Approach

Thopay, Archit (2020-08-11)

Pedestrian navigation techniques are used to provide positioning information in lieu of or to supplement more traditional systems such as GNSS. A challenge facing users of pedestrian navigation algorithms is the acquisition ...

Investigation of Lateral Performance of an ATV Tire on Natural, Deformable Surfaces

Krueger, Darrell (2007-12-15)

A study is undertaken to discover links between soil-rubber interface strength, camber, pressure and lateral performance of a front ATV tire. New tire and soil test rigs are also designed and fabricated for the support ...

Investigation of Precise Relative Positioning through Varying Equipment Grades

Campos-Vega, Christian (2022-02-22)

In this thesis, three methodologies are investigated in order to provide precise relative positioning knowledge between two dynamic platforms as equipment grade is varied. Two methods are integrated into the real-time ...

Kalman Filter Based Tracking Algorithms For Software GPS Receivers

Lashley, Matthew (2006-12-15)

In this thesis several new Kalman filter based tracking algorithms for GPS software receivers are presented. Traditional receivers use Costas loops and Delay Lock Loops (DLL) to track the carrier and Pseudo-Random Noise ...

Lane Detection, Calibration, and Attitude Determination with a Multi-Layer Lidar for Vehicle Safety Systems

Britt, Jordan (2010-11-05)

This thesis develops a lane detection algorithm which extracts lane markings from the road's surface in an effort to ascertain the lateral position of the vehicle in the lane using a lidar, with the goal of being incorporated ...

Lane Level Localization with Camera and Inertial Measurement Unit using an Extended Kalman Filter

Rose, Christopher (2010-12-07)

This thesis studies a technique for combining vision and inertial measurement unit (IMU) data to increase the reliability of lane departure warning systems. In this technique, 2nd-order polynomials are used to model the ...

Laterally String Stable Control at Large Following Distances Using DRTK and TDCP

Geiger, Stephen (2018-08-03)

This thesis examines the lateral string stability of vehicle convoys. String stability is a type of stability that relates specifically to interconnected systems. In the case of vehicle convoys, string stability examines ...

A Loosely Coupled GNSS/PDR Integration Approach for Pedestrian Navigation

Jones, Connor (2023-07-28)

Pedestrian navigation systems embody small, lightweight hardware, techniques, and biomechanical information to provide positioning information in an architecture that substitutes, or supplements, traditional systems such ...

Low-Bandwidth Three Dimensional Mapping and Latency Reducing Model Prediction to Improve Teleoperation of Robotic Vehicles

Woodall, William (2012-07-25)

This thesis uses novel three dimensional sensors like the Microsoft Kinect [1] and the Asus Xtion Pro Live [2] to generate three dimensional environments and use the recon- structed environment with a predictive model in ...