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 14 of 14 for “"Analog Control"”.
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Digital Control for Power Factor Correction
… implementation and improvement of a digital controller for a power factor correction (PFC) converter. The development of the telecommunications industry and the Internet demands reliable, cost-effective and intelligent power. Nowadays, the telecommunication power systems have output current …
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Trust in analog : analog circuit techniques for reducing the risk of malicious circuits and software
… a significant security risk, especially in control applications. This work is concerned with increasing the trustworthiness of control circuitry by reducing its complexity. The security benefits of substituting analog control techniques in place of digital control are analyzed, and both …
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Digital control of a multi-channel boundary-conduction-mode boost converter for power-factor-correction applications
This thesis focuses on the design of digital control schemes for multi-channel boundary-conduction-mode (BCM) boost converters. Multi-channel BCM boost converters are commonly used for the front-end power-factor-corrected (PFC) stage of isolated ac-dc power supplies due to the advantages of being …
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Control of a MEMS fast steering mirror for laser applications
A control system for a MEMS fast steering mirror is designed and implemented to accurately steer a laser beam. This document contains a characterization of important mirror characteristics and the full analysis of an analog control system designed to maximize the performance of the mirror. A full …
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Development of a power electronics for a flywheel energy storage system
… DC-DC converter, allowing the use of mostly analog control. Second, there is a problem associated with the existing six-step brushless DC motor/generator control in the generator mode. A twelve-step control scheme is proposed to solve this problem. Third, high-switching frequency is necessary …
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Optical end point sensing and digital control of a scanning tunneling microscope
… addressed in this thesis is that of digitally controlling a Scanning Tunneling Microscope and implementing end point sensing to close the control loop for accurate X-Y positioning of the microscope tip. This first part entails modifying a microscope with an analog controller so that it may be …
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AC Direct Drive LED Lighting Using Low Cost Analog Components
… starting point and replacing ideal switches and control signals with discrete components. The final version uses a set of comparators and sense resistors to determine when a given LED stack should be on for a simple, analog control solution. Once the system was simulated this way, the assembled …
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Digital Readout and Control of a Superconducting Qubit
… traditionally utilize microwave frequency control signals, and heterodyne based detection schemes for measurement. Both of these techniques rely heavily on room temperature microwave generators, high-bandwidth lines from room temperature to millikelvin temperatures, and bulky non-reciprocal …
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Analysis and Design of High-Intensity-Discharge Lamp Ballast for Automotive Headlamp
… a highly efficient ballast and very complex control circuitry that can achieve fast turn-on and different regulation modes during the lamp start-up process. Due to the complex lamp v-i profile and timing control requirements, control circuit built with conventional analog control is …
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A truly embedded test structure for design-for-manufacturability, hardware security and VLSI testing
… places. The emulation cell incorporates an analog control pin to allow a variety of hardware Trojan loading scenarios to be investigated. Using the hardware data collected from 62 chips fabricated in 90nm CMOS technology, I demonstrate that REBEL can detect the small delay anomalies …
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Investigation of High Performance AC/DC Front-End Converter with Digital Control for Server Applications
… the beginning of transferring their design from analog control to full digital control strategy. Although issues are still exist, reducing components count, reducing the development cycle time, increasing the reliability, enhancing the circuit noise immunity and reducing the cost, all of these …
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Synchronized Communication Network for Real-Time Distributed Control Systems in Modular Power Converters
… are pursuing high-performance distributed control systems. As opposed to the centralized control architecture, the distributed control architecture features shared computational burdens, pulse-width modulation (PWM) latency compensation, simplified fiber-optic cable connection, redundant …
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Modeling and Control of Single Switch Bridgeless SEPIC PFC Converter
… topologies, due to its simple circuitry, simple control scheme and small number of passive components. Even though a boost converter is recognized as a typical PFC converter, its output voltage must be higher than its input voltage. This feature is disadvantageous because the device requires an …
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Interface circuits for readout and control of a micro-hemispherical resonating gyroscope
… (μHSR) This thesis presents the electronic control and read-out interface that has been developed to turn the μHSR into a fully functional micro-hemispherical resonating gyroscope (μHRG) capable of measuring the rate of rotation. First, the μHSR was characterized, which both enabled the …