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Designing A Simple Indirect Vector Controlled Drive System In Simulink, Ryan M. Hanlon
Designing A Simple Indirect Vector Controlled Drive System In Simulink, Ryan M. Hanlon
Graduate Theses, Dissertations, and Problem Reports
In recent years, the need for alternative fueled vehicles has been highlighted by government and industry leaders. The emphasis has focused on hybrid/electric drive systems. In order to compete with current technology, these drives must be capable of operating under various load conditions as well as operating over a large speed range. Such performance requirements require motor control systems that must be capable of overcoming changes within the drive system: primarily motor parameter changes at high speed operation. While multiple control algorithms exist for electric drives, some offer more robust control than others. These algorithms range in cost and complexity.;The …
Electric Power Distribution Expansion Planning Using Distributed Generation Sources And Storages, Ruben R. Avagyan
Electric Power Distribution Expansion Planning Using Distributed Generation Sources And Storages, Ruben R. Avagyan
Graduate Theses, Dissertations, and Problem Reports
Electric Power Distribution Expansion Planning (PDEP) is concerned with finding the best topology of the power distribution grid and component sizing such that power demand at each load bus is satisfied and some objectives are optimized. In this research, a new integrated time-phased problem is considered, where demand changes through the planning horizon and distributed generation sources and energy storages are integrated into the planning process. The growth of power demand in consecutive periods may require an upgrade of existing or construction of new substations and/or feeders during the planning time-span. An alternative solution to meet the growing demand and …
Data Recovery From Magnetic Media Using Magnetic Force Microscopy, Terry R. Ferrett
Data Recovery From Magnetic Media Using Magnetic Force Microscopy, Terry R. Ferrett
Graduate Theses, Dissertations, and Problem Reports
Magnetic tapes are widely used to store voice and other data. Due to the effect of hysteresis, modification of the magnetization pattern written to a tape by overwriting, erasing, or physical damage leaves remanent information about the previous magnetization state that can not be discerned by standard audio playback devices. Recently, a high resolution microscopy technique known as magnetoresistive microscopy was used by Pappas et al. in an attempt to recover data from audio tapes which were physically damaged. However, the device, while having a higher resolution than tape playback heads, still averages over entire audio track widths when collecting …
Dsp Implementation Of Trellis Coded Modulation And Distributed Space Time Coding, Yipeng Tang
Dsp Implementation Of Trellis Coded Modulation And Distributed Space Time Coding, Yipeng Tang
Graduate Theses, Dissertations, and Problem Reports
Trellis coded modulation (TCM) combines convolutional coding with modulation, and offers approximately 2--3 dB of coding gain without requiring a corresponding bandwidth expansion. This thesis describes the process of encoding TCM, convolutional codes, decoding using the Viterbi Algorithm (VA), M-ary modulation formats suitable for TCM, and the evaluation of TCM performance.;The concept of multiple TCM, which is a generalization of ordinary TCM, gives rise to the concept of space time codes (STC). With STC, coded signals are transmitted from multiple antennas at the same time over a Rayleigh fading channel. STC combines of transmit diversity, coding and M-ary modulation to …
Mechatronics For Sophomore-Level Mechanical Engineering Students, David Thomas Morris
Mechatronics For Sophomore-Level Mechanical Engineering Students, David Thomas Morris
Graduate Theses, Dissertations, and Problem Reports
As mechanical product designs become more complex, integrating electromechanical components with embedded control circuitry, the need for engineering graduates with a diversified educational background in multidisciplinary applications has been recognized within many facets of industry. The focus of this research was to create a series of laboratory experiments and a capstone project based on a survey of literature from current educators that could be used to introduce sophomore-level mechanical engineering students to fundamentals in the field known as "mechatronics", which incorporates the traditional disciplines of mechanical, electrical and software engineering. The lab exercises utilize the Handy Board microcontroller from MIT …
Fuzzy Reliability Modeling Of Distributed Client -Server Systems, Patrick Louis Cross
Fuzzy Reliability Modeling Of Distributed Client -Server Systems, Patrick Louis Cross
Graduate Theses, Dissertations, and Problem Reports
With the proliferation of client-server systems there is a need for new approaches to determine their reliability in the uncertain environment of the internet. The proposed methods analyze client-server reliability by accounting for uncertainties in the operational environment of the internet. The uncertainties are addressed with a fuzzy paradigm applied in a tractable, verifiable reliability model of client-server systems. For computer hardware, fuzzy sets were used to address vague reliability data using bi-state fuzzy probabilistic theories. For software and operating systems, fuzzy sets account for the uncertainties in bi-state failure data using fuzzy possibility theories. Client-server architectures, such as hypercubes, …