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Data Transmission in Quantized Consensus

Description: In the world of networked system, average consensus is an important dimension of co-ordinate control and cooperation. Since the communication medium is digital, real value cannot be transmitted and we need to perform quantization before data transmission. But for the quantization, error is introduced in exact value and initial average is lost. Based on this limitation, my 16 bit quantization method (sending MSB in 1-4 cycle and MSB+LSB in 5th cycle) reduces error significantly and preserves ini… more
Date: May 2013
Creator: Parvez, Imtiaz
Item Type: Refine your search to only Thesis or Dissertation
Partner: UNT Libraries
open access

An Implementation of Consensus Through Bluetooth Communication

Description: This thesis provides an implementation of consensus of multi-agent networked systems. Consensus problem is an important issue of distributed computing and has various algorithms and applications in the field of electronical and computer science. The consensus requests all nodes of a network reach an agreement over a certain measurement. An algorithm of convergent consensus problem is implemented through a small network of Bluetooth communication in the thesis. The connections of the Bluetooth d… more
Date: May 2014
Creator: Wang, Yinan
Item Type: Refine your search to only Thesis or Dissertation
Partner: UNT Libraries
open access

Implementation of an Unmanned Aerial Vehicle for New Generation Peterbilt Trucks

Description: As science and technology continue to advance, innovative developments in transportation can enhance product safety and security for the benefit and welfare of society. The federal government requires every commercial truck to be inspected before each trip. This pre-trip inspection ensures the safe mechanical condition of each vehicle before it is used. An Unmanned Aerial Vehicle (UAV) could be used to provide an automated inspection, thus reducing driver workload, inspection costs and time whi… more
Date: May 2016
Creator: Srinivasan K, Venkatesh
Item Type: Refine your search to only Thesis or Dissertation
Partner: UNT Libraries
open access

The Design and Implementation of an Effective Vision-Based Leader-Follower Tracking Algorithm Using PI Camera

Description: The thesis implements a vision-based leader-follower tracking algorithm on a ground robot system. One camera is the only sensor installed the leader-follower system and is mounted on the follower. One sphere is the only feature installed on the leader. The camera identifies the sphere in the openCV Library and calculates the relative position between the follower and leader using the area and position of the sphere in the camera frame. A P controller for the follower and a P controller for the … more
Date: August 2016
Creator: Li, Songwei
Item Type: Refine your search to only Thesis or Dissertation
Partner: UNT Libraries
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Applied Real-Time Integrated Distributed Control Systems: An Industrial Overview and an Implemented Laboratory Case Study

Description: This thesis dissertation mainly compares and investigates laboratory study of different implementation methodologies of applied control systems and how they can be adopted in industrial, as well as commercial, automation applications. Namely the research paper aims to assess or evaluate eventual feedback control loops' performance and robustness over multiple conventional or state-of-the-art technologies in the field of applied industrial automation and instrumentation by implementing a laborat… more
Date: August 2016
Creator: Zaitouni, Wael K
Item Type: Refine your search to only Thesis or Dissertation
Partner: UNT Libraries
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The Modeling and Simulation of EV3 Motor Dynamics

Description: This paper describes a procedure to find the transfer function for the Lego Mindstorms Ev3. Lego Mindstorms Ev3 can serve as the platform for a system modeling and a controller design course. It is economical and accessible. It is also very compatible with Matlab and Simulink. This platform can be used for concepts of modeling, feedback, and controller design. The main approach in this work focuses on the closed loop instead of open loop. Although this approach turns the problem into a mor… more
Date: August 2016
Creator: Norouzi Kandalan, Roya
Item Type: Refine your search to only Thesis or Dissertation
Partner: UNT Libraries
open access

Measurement and Analysis of Indoor Air Quality Conditions

Description: More than 80% of the people in urban regions and about 98% of cities in low and middle income countries have poor air quality according to the World Health Organization. People living in such environment suffer from many disorders like a headache, shortness of breath or even the worst diseases like lung cancer, asthma etc. The main objective of the thesis is to create awareness about the air quality and the factors that are causing air pollution to the people which is really important and provi… more
Date: August 2016
Creator: Chidurala, Veena
Item Type: Refine your search to only Thesis or Dissertation
Partner: UNT Libraries
open access

Development and Analysis of a Mobile Node Tracking Antenna Control System

Description: A wireless communication system allows two parties to exchange information over long distances. The antenna is the component of a wireless communication system that allows information to be converted into electromagnetic radiation that propagates through the air. A system using an antenna with a highly directional beam pattern allows for high power transmission and reception of data. For a directional antenna to serve its purpose, it must be accurately pointed at the object it is communicating … more
Date: August 2017
Creator: Hensley, Phillip Hayden
Item Type: Refine your search to only Thesis or Dissertation
Partner: UNT Libraries
open access

Synthesis and Design of Microwave Filters and Duplexers with Single and Dual Band Responses

Description: In this thesis the general Chebyshev filter synthesis procedure to generate transfer and reflection polynomials and coupling matrices were described. Key concepts such as coupled resonators, non-resonant nodes have been included. This is followed by microwave duplexer synthesis. Next, a technique to design dual band filter has been described including ways to achieve desired return loss and rejection levels at specific bands by manipulating the stopbands and transmission zeros. The concept of d… more
Date: August 2013
Creator: Mandal, Iman K.
Item Type: Refine your search to only Thesis or Dissertation
Partner: UNT Libraries
open access

Parameter Estimation of Microwave Filters

Description: The focus of this thesis is on developing theories and techniques to extract lossy microwave filter parameters from data. In the literature, the Cauchy methods have been used to extract filters’ characteristic polynomials from measured scattering parameters. These methods are described and some examples are constructed to test their performance. The results suggest that the Cauchy method does not work well when the Q factors representing the loss of filters are not even. Based on some prototype… more
Date: December 2015
Creator: Sun, Shuo
Item Type: Refine your search to only Thesis or Dissertation
Partner: UNT Libraries
open access

Clustering Algorithms for Time Series Gene Expression in Microarray Data

Description: Clustering techniques are important for gene expression data analysis. However, efficient computational algorithms for clustering time-series data are still lacking. This work documents two improvements on an existing profile-based greedy algorithm for short time-series data; the first one is implementation of a scaling method on the pre-processing of the raw data to handle some extreme cases; the second improvement is modifying the strategy to generate better clusters. Simulation data and real… more
Date: August 2012
Creator: Zhang, Guilin
Item Type: Refine your search to only Thesis or Dissertation
Partner: UNT Libraries
open access

A Smooth-turn Mobility Model for Airborne Networks

Description: In this article, I introduce a novel airborne network mobility model, called the Smooth Turn Mobility Model, that captures the correlation of acceleration for airborne vehicles across time and spatial coordinates. E?ective routing in airborne networks (ANs) relies on suitable mobility models that capture the random movement pattern of airborne vehicles. As airborne vehicles cannot make sharp turns as easily as ground vehicles do, the widely used mobility models for Mobile Ad Hoc Networks such a… more
Date: August 2012
Creator: He, Dayin
Item Type: Refine your search to only Thesis or Dissertation
Partner: UNT Libraries
open access

Simulation Study of Tremor Suppression and Experiment of Energy Harvesting with Piezoelectric Materials

Description: The objective of this research is to develop a wearable device that could harvest waste mechanical energy of the human hand movement and utilize this energy to suppress wrist tremors. Piezoelectric material is used to measure the hand movement signals, and the signal of wrist tremor is filtered to be utilized to suppress the tremor. In order to conduct the experiment of energy harvesting and tremor suppression, an experimental rig was fabricated. Two types of piezoelectric materials, PVDF (poly… more
Date: August 2012
Creator: Ou, Jianqiang
Item Type: Refine your search to only Thesis or Dissertation
Partner: UNT Libraries
open access

An Interactive Tool to Investigate the Inference Performance of Network Dynamics From Data

Description: Network structure plays a significant role in determining the performance of network inference tasks. An interactive tool to study the dependence of network topology on estimation performance was developed. The tool allows end-users to easily create and modify network structures and observe the performance of pole estimation measured by Cramer-Rao bounds. The tool also automatically suggests the best measurement locations to maximize estimation performance, and thus finds its broad applications… more
Date: August 2012
Creator: Veenadhar, Katragadda
Item Type: Refine your search to only Thesis or Dissertation
Partner: UNT Libraries
open access

The Effect of Mobility on Wireless Sensor Networks

Description: Wireless sensor networks (WSNs) have gained attention in recent years with the proliferation of the micro-electro-mechanical systems, which has led to the development of smart sensors. Smart sensors has brought WSNs under the spotlight and has created numerous different areas of research such as; energy consumption, convergence, network structures, deployment methods, time delay, and communication protocols. Convergence rates associated with information propagations of the networks will be ques… more
Date: August 2014
Creator: Hasir, Ibrahim
Item Type: Refine your search to only Thesis or Dissertation
Partner: UNT Libraries
open access

Networking and Decentralized Control in Layered Networks: a Theoretical Study and Test-bed Development

Description: Layered structures are commonly used in communication systems, but their roles in decentralized control are not understood well. In the first part of this thesis, a theoretical study of consensus (a typical decentralized control task) in layered structures is conducted. The unique graph topology approach permits explicit characterization of consensus performance based on simple graphical characteristics of MLMG structures. In the second part of this thesis, a generic LEGO test-bed to mimic mult… more
Date: December 2014
Creator: Sheth, Vardhman Jayeshkumar
Item Type: Refine your search to only Thesis or Dissertation
Partner: UNT Libraries
open access

Optimal Sensor Placement for Structural Health Monitoring

Description: In large-scale civil structures, a limited number of sensors are placed to monitor the health of civil structures to reduce maintenance, communication and energy costs. In this thesis, the problem of optimal sensor location placement to infer the health of civil structures is explored. First, a comparative study of approaches from the fields of control engineering and civil engineering is conducted . The widely used civil engineering approaches such as effective independence (EI) and modal assu… more
Date: December 2014
Creator: Movva, Gopichand
Item Type: Refine your search to only Thesis or Dissertation
Partner: UNT Libraries
open access

Development of a Cost Effective Wireless Sensor System for Indoor Air Quality Monitoring Applications

Description: Poor air quality can greatly affect the public health. Research studies indicate that indoor air can be more polluted than the outdoor air. An indoor air quality monitoring system will help to create an awareness of the quality of air inside which will eventually help in improving it. The objective of this research is to develop a low cost wireless sensor system for indoor air quality monitoring. The major cost reduction of the system is achieved by using low priced sensors. Interface circuits … more
Date: May 2014
Creator: Abraham, Sherin
Item Type: Refine your search to only Thesis or Dissertation
Partner: UNT Libraries
open access

A Lego Mindstorms Nxt Based Test Bench for Multiagent Exploratory Systems and Distributed Network Partitioning

Description: Networks of communicating agents require distributed algorithms for a variety of tasks in the field of network analysis and control. For applications such as swarms of autonomous vehicles, ad hoc and wireless sensor networks, and such military and civilian applications as exploring and patrolling a robust autonomous system that uses a distributed algorithm for self-partitioning can be significantly helpful. A single team of autonomous vehicles in a field may need to self-dissemble into multiple… more
Date: May 2014
Creator: Patil, Riya Raghuvir
Item Type: Refine your search to only Thesis or Dissertation
Partner: UNT Libraries
open access

Arduino Based Hybrid MPPT Controller for Wind and Solar

Description: Renewable power systems are becoming more affordable and provide better options than fossil-fuel generation, for not only the environment, but a benefit of a reduced cost of operation. Methods to optimize charging batteries from renewable technologies is an important subject for off-grid and micro-grids, and is becoming more relevant for larger installations. Overcharging or undercharging the battery can result in failure and reduction of battery life. The Arduino hybrid MPPT controller takes t… more
Date: December 2017
Creator: Assaad, Michael
Item Type: Refine your search to only Thesis or Dissertation
Partner: UNT Libraries
open access

Implementation of Turbo Codes on GNU Radio

Description: This thesis investigates the design and implementation of turbo codes over the GNU radio. The turbo codes is a class of iterative channel codes which demonstrates strong capability for error correction. A software defined radio (SDR) is a communication system which can implement different modulation schemes and tune to any frequency band by means of software that can control the programmable hardware. SDR utilizes the general purpose computer to perform certain signal processing techniques. We … more
Date: December 2010
Creator: Talasila, Mahendra
Item Type: Refine your search to only Thesis or Dissertation
Partner: UNT Libraries
open access

Modeling and Control of a Motor System Using the Lego EV3 Robot

Description: In this thesis, I present my work on the modeling and control of a motor system using the Lego EV3 robot. The overall goal is to apply introductory systems and controls engineering techniques for estimation and design to a real-world system. First I detail the setup of materials used in this research: the hardware used was the Lego EV3 robot; the software used was the Student 2014 version of Simulink; a wireless network was used to communicate between them using a Netgear WNA1100 wifi dongle. N… more
Date: August 2015
Creator: Mitchell, Ashley C.
Item Type: Refine your search to only Thesis or Dissertation
Partner: UNT Libraries
open access

An Arduino Based Control System for a Brackish Water Desalination Plant

Description: Water scarcity for agriculture is one of the most important challenges to improve food security worldwide. In this thesis we study the potential to develop a low-cost controller for a small scale brackish desalination plant that consists of proven water treatment technologies, reverse osmosis, cation exchange, and nanofiltration to treat groundwater into two final products: drinking water and irrigation water. The plant is powered by a combination of wind and solar power systems. The low-cost c… more
Date: August 2015
Creator: Caraballo, Ginna
Item Type: Refine your search to only Thesis or Dissertation
Partner: UNT Libraries
open access

AirSniffer: A Smartphone-Based Sensor Module for Personal Micro-Climate Monitoring

Description: Environmental factors can have a significant impact on an individual's health and well-being, and a primary characteristic of environments is air quality. Air sensing equipment is available to the public, but it is often expensive,stationary, or unusable for persons without technical expertise. The goal of this project is to develop an inexpensive and portable sensor module for public use. The system is capable of measuring temperature in Celsius and Fahrenheit, heat index, relative humidity, a… more
Date: May 2016
Creator: Smith, Jeffrey Paul
Item Type: Refine your search to only Thesis or Dissertation
Partner: UNT Libraries
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