Browsing by Author "Sinclair, Andrew"

Now showing items 1-20 of 24

Angles-Only Initial Relative-Orbit Determination via Successive Maneuvers

Hebert, Laura (2016-04-29)

For relative-orbit determination using linear, Cartesian dynamics, angles-only measurements are not sufficient. A known, impulsive maneuver performed by either the observer or resident space object can provide observability. ...

The Application of a Particle Filter to Urban Ground Target Localization, Tracking, and Intercept

Doucette, Emily (2012-05-01)

Ground vehicle localization is a problem of significance in an urban setting given the recent global conflicts, security interests, and rapid growth of sensor networks. This task is often difficult due to the lack of ...

Characterization of Numerical Error in the Simulation of Translunar Trajectories Using the Method of Nearby Problems

Jagat, Ashish (2011-05-04)

This thesis focuses on analyzing the effect numerical error has on the accurate simulation of translunar trajectories. The method of nearby problems is employed to estimate the numerical error. A simulation is developed ...

Conceptual Design Optimization of an Augmented Stability Aircraft Incorporating Dynamic Response Performance Constraints

Welstead, Jason (2014-12-10)

This research focused on incorporating stability and control into a multidisciplinary design optimization on a Boeing 737-class advanced concept called the D8.2b. A new method of evaluating the aircraft handling performance ...

Control System Development for Autonomous Aerobatic Maneuvering with a Fixed-Wing Aircraft

Reitz, Brian (2014-12-04)

The increasing popularity of unmanned aircraft today has led to the development of more sophisticated vehicles with greater operating capabilities. The multirole nature of many civil and military unmanned aircraft along ...

Design and Evaluation of a 3D Road Geometry Based Heavy Truck Fuel Optimization System

Huang, Wei (2010-07-28)

This dissertation develops a 3D road geometry based optimal powertrain control system in reducing the fuel consumption of heavy trucks. The real-time optimal control (OC) system, solving a constrained nonlinear programming ...

Design of a Guidance Controller Using Network Topology

Robertson, Clay (2016-08-05)

In dynamic environments, the control of a formation of unmanned vehicles remains a significant control problem on both network and guidance dynamics levels. Currently, formations of unmanned vehicles require multiple ground ...

Effect of Coordinate Switching on Simulation Accuracy of Translunar Trajectories

Vautier, Mana (2008-08-15)

This thesis focuses on the effect of round-off error in the accurate simulation of translunar trajectories. The three-body dynamics can be posed in either an Earth-centered (EC) or Moon-centered (MC) frame. In this study, ...

Effects of Rotational Motion on the Ballistic Coefficient of Space Debris

Walsh, Thomas (2012-05-09)

Accurate predication of the future states of operational spacecraft and space debris are necessary for conjunctional analysis. Prediction of the states of debris for a few orbital periods is possible with improved models ...

Enhancement and Defense of GPS Navigation Using Signal Processing Techniques

Carson, Nathaniel (2018-02-14)

In this thesis methods of spoo ng prevention are developed to detect, identify, and mitigate an attack against both networked and standalone GPS receivers. A network based detection algorithm is introduced which combines ...

Fault Detection and Exclusion in Deeply Integrated GPS/INS Navigation

Clark, Benjamin (2012-12-04)

This dissertation presents a novel fault detection and exclusion method in a centralized deeply integrated GPS/INS navigation system. The method presented is also demonstrated in a centralized vector tracking GPS ...

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 ...

Initial Relative-Orbit Determination Using Second-Order Dynamics and Line-of-Sight Measurements

Garg, Shubham (2015-05-06)

This thesis addresses the problem of determining the initial relative-orbit state between a chief and a deputy satellite using line-of-sight unit vectors. An analytical solution is investigated for estimating the deputy ...

Mapping for Path Planning using Maximal Empty Rectangles

Park, Jinyoung (2013-05-14)

This study applies a new map representation, named R-map, to the path-planning problem. The R-map is calculated as a reduced-element representation of a grid map. Grid maps express obstacles and free space with a binary ...

Nonlinear Tracking of Natural Mechanical Systems for HWIL Simulation

Martin, Justin (2007-08-15)

Auburn University has entered into collaboration with the US Department of Defense for academic study and development of hardware-in-the-loop simulation laboratory. One aspect of this collaboration has been research into ...

Path Duplication Using GPS Carrier Based Relative Position for Automated Ground Vehicle Convoys

Travis, William (2010-04-15)

A GPS based automated convoy strategy to duplicate the path of a lead vehicle is presented in this dissertation. Laser scanners and cameras are not used; all information available comes from GPS or inertial systems. An ...

A Predictive Autorotation Entry Analysis Using Bayesian Multi-Model Estimation Detection

Martin, Justin (2017-11-29)

Improvements to achieving helicopter autorotation in an event of engine or driveshaft failure is an issue that has and always will be present in the engineering landscape. Questions include, “how much of a performance hit ...

Rapid Missile System Characterization Using Computational Intelligence

Ritz, Steven (2014-05-15)

There exist many physical relationships between dynamic systems that humans can infer data from where an exact science may not be possible or plausible to apply. The imprecision or inaccuracy of attempted models and ...

A Reduced Element Map Representation and Applications: Map Merging, Path Planning, and Target Interception

Park, Jinyoung (2017-07-25)

Modern autonomous systems require complex and heavy computations. The complexity can be reduced by eliminating or integrating redundant information. In the case of mobile vehicles, occupancy grid map representations are ...

Scene Generation and Target Detection for Hardware-in-the-Loop Simulation

Sherrill, Ryan E. (2009-04-20)

Hardware-in-the-Loop simulations are useful in developing and testing missile components at a lower cost than experimental tests. Accurate results require the missile's optical sensor be stimulated by an artificial ...