Browsing by Author "Hung, John"

Now showing items 1-20 of 61

Adaptive Disturbance Rejection and Stabilization for Rotor Systems with Internal Damping

Simon, Andras (2009-05-15)

Advanced rotor systems today consist of a lightweight rotor supported by radial active magnetic bearings (AMB). These systems are widely used in flywheel applications and in other fields where high rotational speeds are ...

Analysis of DC Power Systems Containing Induction Motor-Drive Loads

Leedy, Aleck (2006-05-15)

The development of an analytical method used for conducting a power flow analysis on a DC power system containing multiple motor-drive loads is presented. The method is fast, simplistic, easy to implement, and produces ...

Analysis, Design and Construction of an LLC Resonant Converter

Pu, Shi (2016-05-02)

The trend in DC/DC converters development is toward higher frequency, power density and efficiency. The traditional hard-switched converter is limited in switching frequency and power density. The phase-shift full-bridge ...

Artificial Nonlinear Stiffness and Artificial Vacuum for Wide-Bandwidth High-Q Resonance Behavior

Han, Yingsong (2023-07-27)

This dissertation explores the use of electrostatic force feedback to generate artificial performance characteristics in a microdevice that would otherwise not be possible. As a test case, a non-vacuumed microresonator ...

An Automatic Depth Control System for the On-the-Go Soil Strength Sensor

Smith, Clifford (2007-12-15)

Hardpans are areas of soil compaction formed by vehicle traffic or natural processes. These compacted areas beneath the topsoil can hinder successful crop production. A novel sensor for measuring soil strength was presented ...

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 ...

Control, Modeling, and Analysis of Inverter-Based Resources

Baker, William (2021-11-23)

The increased penetration level of Inverter-Based Resources (IBR) presents new challenges to the planning and operation of electric grids traditionally designed, protected, and operated based on the inherent characteristics ...

Cooperative Map-Building for Autonomous Mobile Robots

Wagh, Rajish (2017-04-20)

A novel algorithm for multi-robot simultaneous localization and mapping is investigated through simulation. Although cooperative-SLAM has been studied by other researchers, the algorithm presented here offers a simpler, ...

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 ...

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 ...

Design and Implementation of Digital Controllers for Buck and Boost Converters Using Linear and Nonlinear Control Methods

Guo, Liping (2006-08-15)

Issues in the design and implementation of digital controllers for a buck converter and a boost converter using linear and nonlinear control methods were investigated in this dissertation. The small signal models of the ...

Design and Implementation of Digital Current Mode Control

He, Siyu (2015-05-11)

Presented in this dissertation are three digital control methods of current mode control for switch-mode power supplies. Both the current and voltage loop are implemented on the digital processor. Digital versions of peak ...

Design, Testing, and Simulation of a Low-Cost, Light-Weight, Low-g IMU for the Navigation of an Indoor Blimp

Anderson, Abby (2006-05-15)

In this thesis we develop an IMU for the purpose of navigating an autonomous indoor blimp. Due to the unique system properties of an indoor blimp, the developed IMU is light-weight and is capable of measuring slow rotational ...

Determination of the Allowable Parametric Uncertainty in the Closed Loop Via a Skew-μ Based Technique with an Application to the Yaw-Roll Vehicle Model

Brown, Lowell (2017-08-14)

In this dissertation, a methodical approach is presented that quantifies how well model parameters need to be known or by how much they can vary in order that the performance of a controller in closed loop is maintained. ...