Browsing by Author "Hung, John"

Now showing items 41-60 of 61

Modelling, Control and Estimation Techniques For Micromachined Electrostatic Actuators Using Macro Magnetic Actuators

Li, Chong (2016-07-29)

Parallel plate actuators (PPAs) are fundamental devices in micro-electro-mechanical systems. PPAs' main drawback is their limited open loop stable traveling range which is caused by their nonlinear electrostatic force. ...

Monitoring Moisture Content and Mass Flow of Wood Chips Using Electrical Capacitance Tomography

Pan, Pengmin (2014-12-10)

Woody biomass is currently sold on a wet basis, a system that works because moisture content of harvested trees normally uctuates within a narrow range and wood from multiple sources can be considered a uniform product. ...

Multi-robot SLAM and map merging

Li, Hongye (2015-05-04)

Although it is a very useful technique for a robot to detect an unknown environment and plot the map, mapping is a classic problem in robotics. The mapping task can be sped up by multi-robot cooperation. Each robot in a ...

Nonlinear Control and Design Methodologies for Electrostatic MEMS Devices

Ozmun, Phillip M. (2007-08-15)

A method to extend the travel range of electrostatically actuated MEMS device is presented. A gap closing actuator (GCA) is used to demonstrate the method. An output (position)feedback controller is presented, along with ...

Nonlinear Systems Control Using a Subset Stabilization Approach

Simmons, Adam (2006-05-15)

Numerous problems in nonlinear control systems are difficult or impossible to solve with commonly proposed methods of design. For such systems, we propose a two-loop control strategy that we call the subset stabilization ...

Obstacle Avoidance of an Unmanned Ground Vehicle using a Combined Approach of Model Predictive Control and Proportional Navigation

Shaw, Ryan (2018-12-06)

This thesis presents a new approach for the guidance and control of a UGV (Unmanned Ground Vehicle). A special focus was placed on moving obstacles that interfere with the planned path of the vehicle, this is due to the ...

On-line Estimation of Implement Dynamics for Adaptive Steering Control of Farm Tractors

Gartley, Evan (2005-12-15)

An adaptive control technique for the control of a farm tractor during low levels of excitation and at low velocities is presented. Results of a set of system identification experiments are compared to previous tractor ...

Particle Swarm Optimization Applied to the Design of a Nonlinear Control

Broderick, David (2006-05-15)

A method of searching for a tuning of an input to state linearizing controller is presented. The problem of ?nding the appropriate weights of the control law’s terms is treated as an optimization problem. Given the highly ...

Path Following and Obstacle Avoidance for Autonomous Ground Vehicles Using Nonlinear Model Predictive Control

Brothers, Robert (2020-05-18)

This thesis presents a nonlinear model predictive controller (NMPC) for path following and obstacle avoidance in automated driving systems. Automated safety control systems have been increasingly effective at reducing ...

Pine Seedling Detection and Registration

Hunt, Jeff (2009-11-20)

Pine seedling nurseries across the United States depend on antiquated techniques and equipment to manage the country’s supply of pine seedling stock. This research is directed towards the development of a method to ...

Power Quality Standard Comparison between China, IEEE, and IEC

Zheng, Tianxu (2018-11-15)

This thesis compares power quality standards and measurement methods of the U.S. and China. These standards specify the power quality parameters (harmonics, flicker, unbalance,etc.), that are dedicated to ensure the ...

Radar Probabilistic Data Association Filter with GPS Aiding for Target Selection and Relative Position Determination

Sherer, Tyler (2017-04-21)

In this thesis, Global Positioning System (GPS) and radar measurements are utilized in a multi-sensor architecture to achieve a confident relative positioning solution between two vehicles. A GPS solution providing a ...

Reaction: An Android Based Supplemental Learning Aid for Engineering Education

Gaddes, Christopher (2016-12-07)

The rapid rise of the smartphone platform is changing many facets of modern life. The platform presents exciting opportunities for supplemental education. Many mobile education applications are available e.g. Duolingo, an ...

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 ...

Sample selection and reconstruction for array-based multispectral imaging

Parmar, Manu (2007-05-15)

In this work we address the problem of acquisition of multispectral images in a sampled form and the subsequent processing of the acquired signal. The problem is relevant in the context of color imaging in digital ...

Solutions for Tractor-trailer Path Following at Low Speed

Wu, Tong (2017-07-22)

Autonomous tractor-trailer systems have become more and more popular in real life. This dissertation focuses on control and estimation for the path following problem where space-based path is used as reference. The goal ...

Statistical Analysis of Time Delays in USB Type Sensor Interfaces on Windows-based Low Cost Controllers

Ramadoss, Lalitha (2008-12-15)

Real-time control systems need sensor data at periodic and predictable time intervals- this is one aspect of what is commonly called ""determinism"". Common forces that present challenges to determinism in Windows-based ...

Stream Function Path Planning and Control for Unmanned Ground Vehicles

Daily, Robert (2008-08-15)

This research develops a harmonic potential field based path planner and controller. The first component of the dissertation compares several analytical and numerical potential field generation methods. To overcome ...

A Study of the Effects of Stochastic Inertial Sensor Errors in Dead-Reckoning Navigation

Wall, John (2007-08-15)

The research presented in this thesis seeks to quantify the error growth of navigation frame attitude, velocity, and position as solely derived from acceleration and rotation- rate measurements from a strapdown Inertial ...

Training Arbitrarily Connected Neural Networks with Second Order Algorithms

Cotton, Nicholas (2008-08-15)

Neural networks have been an active area of research and application for many years. Today they are gaining popularity with the growing processing power of modern computers. With neural networks gaining popularity comes ...