Thesis (Ph. D.)--Carleton University, 2004. / Includes bibliographical references (p. 189-201) and index. Also available in electronic format on the Internet.

Thesis (Ph. D.)--Missouri University of Science and Technology, 2008. / Vita. The entire thesis text is included in file. Title from title screen of thesis/dissertation PDF file (viewed May 27, 2008) Includes bibliographical references.

Originally presented as the author's Thesis (doctoral)--Technische Universität München. / "FGV-TUM." Includes bibliographical references (p. 147-156).

Thesis (Ph.D.)--University of Delaware, 2005. / Principal faculty adviser: Xiang-Gen Xia, Dept. of Electrical & Computer Engineering. Includes bibliographical references.

Orientador: Ernesto Ruppert Filho / Dissertação (mestrado) - Universidade Estadual de Campinas, Faculdade de Engenharia Eletrica e de Computação / Made available in DSpace on 2018-08-14T03:57:12Z (GMT). No. of bitstreams: 1 Lazarini_MarcosVinicius_M.pdf: 4342557 bytes, checksum: cca354c6cf0938fd0151555654c04067 (MD5) Previous issue date: 2008 / Resumo: Este trabalho apresenta um estudo detalhado de uma configuração de controle direto de torque (DTC) de motores de indução trifásicos usando modulação em largura de pulsos por vetores espaciais, controlador de estrutura variável tipo modos deslizantes (sliding mode) e estimador de velocidade adaptativo do tipo MRAS (model reference adaptive system). Procurou-se apresentar um tutorial detalhado sobre o assunto onde, desde a modelagem matemática adequada do motor de indução trifásico e do controle direto de torque, da modelagem do controlador tipo modos deslizantes e do estimador MRAS até a programação do sistema em processador digital de sinais foram detalhadas. Construiu-se uma plataforma experimental no Laboratório de Eletrônica de Potência da FEEC/UNICAMP para comprovação dos resultados teóricos obtidos através de modelagens matemáticas e simulações digitais realizadas. Os resultados em geral se mostraram adequados e o trabalho certamente contribuiu bastante para a formação do autor para trabalhos de pesquisas científica e tecnológica. Espera-se que o resultado deste trabalho venha contribuir para o estudo de futuros pesquisadores e para o ensino de pós-graduação e, quem sabe de graduação também, nas áreas de controle, eletrônica de potência e controle de máquinas elétricas. / Abstract: This work presents a detailed study of a three-phase induction motor direct torque control (DTC) using space vector pulse width modulation, variable structure controller of sliding mode type and a MRAS rotor speed estimator (model reference adaptive system). It is shown here a detailed tutorial, covering the three-phase induction motor dynamic mathematical modeling and the direct torque control, the sliding mode controller and the MRAS estimator model, up to the digital signal processor programming structure. An experimental set-up was built in the Power Electronics Laboratory of the FEEC/UNICAMP in order to confirm the theoretical results obtained using dynamic simulation. The results obtained were considered adequate in various situations, and the development of this work became a fundamental contribution to the author in terms of his scientific and academic research skills improvement. It is expected that this work could contribute to the future researchers' learning process and also to the graduate and undergraduate control students, control of electrical machines students and power electronics learning process. / Mestrado / Automação / Mestre em Engenharia Elétrica

As the load on the power system grows and new transmission facilities become increasingly difficult to build, the utilities must look to ways to make the most of the current transmission system. Adaptive relaying is one way to enhance the ability of the power system. On the Florida - Georgia interface an adaptive out-of-step relay is being installed. This relay determines if swings on the power system will remain stable by performing a better then real-time transient stability study. Because of the computing capacity required for a transient stability study, the study cannot be performed on the full power system. A reduced model must be used. In this thesis, various methods of obtaining reduced models for use in the relay will be explored. The models will be verified with a full system model using Electric Power Research Institute's (EPRI) Extended Transient-Midterm Stability Package (ETMSP). / Master of Science

Thesis (M. Tech. (Engineering Electrical)) -- Central University of Technology, Free State, [2014] / This dissertation evaluates the software and hardware components used to develop a Reconfigurable Assembly System with an Integrated Information Management System. The assembly system consists of a modular Cartesian robot and vision system. The research focuses on the reconfigurability, modularity, scalability and flexibility that can be achieved in terms of the software and hardware components used within the system. The assembly system can be divided into high-level control and low-level control components. All information related to the product, Cartesian positioning and processes to follow resides in the Information Management System. The Information Management System is the high-level component and consists of a database, web services and low-levelcontrol drivers. The high-level system responds to the data received from the low-level systems and determines the next process to take place. The low-level systems consist of the PLC (Programmable Logic Controller) and the vision system. The PLC controls the Cartesian robot’s motor controllers and handles all events raised by field devices (e g. sensors or push buttons). The vision system contains a number of pre-loaded inspections used to identify barcodes and parts, obtain positioning data and verify the products’ build quality. The Cartesian robot’s positioning data and the vision system’s inspections are controlled by the Information Management System. The results showed that the high-level control software components are able to add more modularity and reconfigurability to the system, as it can easily adapt to changes in the product. The high-level control components also have the ability to be reconfigured while the assembly system is online without affecting the assembly system. The low-level control system is better suited to handling the control of motor controllers, field devices and vision inspections over an industrial network.

Macroscopic fundamental diagram is the concept of the highest importance in traffic flow theory used for development of network-wide control strategies. Previous studies showed that so called Arterial Fundamental Diagrams (AFDs) properly depict relationships between major macroscopic traffic variables on urban arterials. Most of these studies used detector’s occupancy as a surrogate measure to represent traffic density. Nevertheless, detector’s occupancy is not very often present in the field data. More frequently, field data from arterial streets provide performance metrics measured at the stop lines of traffic signals, which represent a hybrid of flow and occupancy. When such performance measures are used in lieu of density, the outcomes of the relationships between macroscopic fundamental variables can be confusing. This study investigates appropriateness of using degree of saturation, as a representative surrogate measure of traffic density, obtained from an adaptive traffic control system that utilizes stop-line detectors, for development of AFDs. / Includes bibliography. / Thesis (M.S.)--Florida Atlantic University, 2016. / FAU Electronic Theses and Dissertations Collection

A methodology to estimate the state of a moving marine vehicle, defined by its position, velocity and heading, from an unmanned surface vehicle (USV), also in motion, using a stereo vision-based system, is presented in this work, in support of following a target vehicle using an USV. / Includes bibliography. / Dissertation (Ph.D.)--Florida Atlantic University, 2015 / FAU Electronic Theses and Dissertations Collection

Biomimetic flapping-wing vehicles have attracted recent interest because of their numerous potential military and civilian applications. In this dissertation is described the design of a multi-agent adaptive controller for such a vehicle. This controller is responsible for estimating the vehicle pose (position and orientation) and then generating four parameters needed for split-cycle control of wing movements to correct pose errors. These parameters are produced via a subsumption architecture rule base. The control strategy is fault tolerant. Using an online learning process, an agent continuously monitors the vehicle's behavior and initiates diagnostics if the behavior has degraded. This agent can then autonomously adapt the rule base if necessary. Each rule base is constructed using a combination of extrinsic and intrinsic evolution. Details of the vehicle, the multi-agent system architecture, agent task scheduling, rule base design, and vehicle control are provided.