Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 148 for “"vector control"”.
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The application of vector control to PWM drives
… motor drive system, whereas the second was a PWM Vector Control System.<br/><br/>The thesis also contains the results of experimental investigations into the performance of the drive system, where the control strategies were implemented by means of a transputer. The experimental results …
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Heat transfer modeling of jet vane Thrust Vector Control (TVC) Systems
… herein, analyzes two models of a jetvane Thrust Vector Control (TVC) System. Computational modeling was accomplished using the latest version of the PHOENICS computer code, designated PHOENICS-84. The vane configurations studied, consisted of a simple wedge and a blunt bodied vane, with a leading …
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The potential for environmental management to contribute to malaria vector control in western Niger
… management techniques to contribute to malaria vector control in Niger, with a case study on Banizoumbou village in western Niger. Numerical modeling was used to simulate habitat modifications in the form of leveling a topographic depression, ploughing the land surface to enhance infiltration …
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Modeling, and classical and advanced control of a solid rocket motor thrust vector control system
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 1993.
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Implementation of a Digital Signal Processor (DSP) Based Space Vector Control of AC Induction Motor Drives
… inverters transfer energy from a DC source to a controlled process in the form of pulse trains, using semiconductor switches which are turned on and off at fast repetition rates. This thesis explains in depth how these pulse trains synthesize sine waves. AC waveform generation techniques such as …
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Effects of multirate compensation on a digital autopilot for thrust vector control of a launch vehicle
Thesis. 1976. M.S.--Massachusetts Institute of Technology. Dept. of Aeronautics and Astronautics.
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Exploiting the Conflict Within: Examining Tripartite Interactions for Development of Next Generation Mosquito Microbiome Vector Control Strategies.
… many aspects of their biology, including vector competence. Given their intimate association, these microbes have established a wide range of strategies aiding them in their transmission, either horizontally or vertically, making them highly attractive for applied vector control approaches …
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The reproductive health effects of along term DDT exposure on malaria vector control workers in Northern Province, South Africa
… countries including South Africa for the control of malaria vectors, have been shown to be endocrine disruptors in vitro and in vivo. The study hypothesis was that male vector control workers highly exposed to DDT in the past should demonstrate clinically significant exposure-related …
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Evaluating the cost-effectiveness of artemisinin-based combination antimalarial drugs and malaria rapid diagnostic tests within the context of effective vector control : case study of Southern Africa
… to evaluate, within the context of effective vector control, the change to artemisinin-based combination therapies (ACTs) as first line malaria treatment and to evaluate the relevance of using definitive diagnosis (as opposed to clinical diagnosis) as the basis for initiating malaria …
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Speed sensorless field oriented control of ac induction motor using model reference adaptive system
In order implement the vector control technique, the motor speed information is required. Incremental encoder, resolvers and tachogenerator, are used to reveal the speed. These sensors require careful mounting and alignment and special attention is required with electrical noises. Sensorless speed …
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Antibiotic resistant and xenobiotic degrading bacteria that shape the microbiota of the vectors Aedes aegypti & Culicoides sonorensis
Vector-borne disease cases have doubled in the United States over the last two decades. The vectors, Aedes aegypti and Culicoides sonorensis, which transmit pathogens that affect humans and animals, are present in the United States, and their geographic distribution continues to grow. The viruses …
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Real time hardware implementation of power converters for grid integration of distributed generation and statcom systems
… and security. This thesis investigates advanced control technology for grid integration of renewable energy sources and STATCOM systems by verifying them on real time hardware experiments using two different systems: d SPACE and OPAL RT. Three controls: conventional, direct vector control and the …
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Modeling of voltage source converter based HVDC transmission system in EMTP-RV
… in a power transmission system is the precise control of active and reactive power flow to maintain the system voltage stability. The VSC operating with the specified vector control strategy can perform independent control of active/reactive power at both ends. This ability of VSC makes it …
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Modeling, simulation and analysis of an indirect vector controlled induction motor drive
Vector control technique is being widely used in ac motors drives for precise dynamic control of torque, speed and position. The application of vector control scheme to the induction motor drive and the complete modeling, analysis and simulation of the drive system are presented in this thesis. …
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Short-to-medium term dengue forecast in Singapore
… and affordable vaccine for the disease, vector control remains the most effective way to control dengue transmission. The objective of this thesis is to develop spatially resolved accurate short-to-medium term dengue forecast systems, informed by mechanistic understanding of dengue …
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Experimental verification for the design of a doubly-fed permanent magnetic generator
… to verify the model of the machine. At last a vector control method is proposed with the stability analysis using the parameters developed from the model. Moreover, the damping effect of the permanent magnet (PM) rotor plate is explored. Keywords: doubly-fed induction, permanent magnet, finite …
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Vector controlled induction motor drive systems
… of the ac machines is the complexity in control and the cost of the related circuitry. With the advent of vector control, ac machines have overcome this disadvantage and are being employed in different applications where dc motors were traditionally used. The d-q modeling, simulation and …
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