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 23 for “"digital control system"”.
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Digital control system programming from process control diagrams
A graphical process control language has been developed as a means of defining process control software. The user configures a block diagram describing the required control system, from a menu of functional blocks, using a graphics software system with graphics terminal. Additions may be made to …
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Implementation of a digital control system analysis program using the z-transform
<p>Control system design and analysis is computationally complex and includes a wide range of tools to aid the engineer. For discrete systems the z-transform is one such tool. This paper discusses the development and application of a computer program which utilizes the z-transform in the analysis …
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Design and simulation of a digital control system for a multi-modular power plant
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Nuclear Engineering, 1992.
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Analysis and IC Implement of Digitally Controlled Multi-Port DC -Dc Converters
This dissertation spans several aspects of digital control in a dc-dc converter. The efforts divide into three thrusts: (1) digital control system analysis, (2) design of IC-based digital controller, and (3) implementation and testing of the design. As for digital control system analysis, a …
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Susceptibility of a digital turbine control system to IEEE 802.11 compliant emissions.
… With the nuclear power industry moving toward digital technologies for control and reactor protection systems, concern exists regarding their potential susceptibility to contemporary wireless telecommunications technologies. This study evaluates the susceptibility of Comanche Peak's planned …
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Development of a control system for a SMA actuated medical manipulator
This thesis discusses the development of a digital control system for the operation of a conceptual robotic manipulator for use in minimally invasive surgery. The motion of the manipulator is envisioned to be accomplished with actuators made of Shape Memory Alloy (SMA). SMA has the ability to …
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Control of Herbicide Sprayers With Soil Organic Matter as an Input (Illinois)
A digital control system for agricultural field sprayers was designed using bypass nozzles to minimize changes in spray pattern and drop size. Sprayer travel speed and the organic matter in the soil under the sprayer were the design inputs. Step, impulse and sinusoidal demands on the system were …
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Facial hacking: the twisted logic of electro-facial choreography
… of a computational facial language that enables systematic exploration of the external controlled human face with the aim to identify fundamental electro-facial choreographic patterns. Rewiring the human face to an external digital control system, has sparked a radical new way of thinking about …
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Exploration and Design of a Magnetic Levitation System
… the inner workings of a magnetic levitation system: a commercial levitating moon-lamp device. This device is able to levitate the floating lamp from the bottom and is stable when aligned correctly. The objective is to investigate how this device operates. A commercial device is purchased and …
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Digital plasma control system and Alcasim simulation code for Alcator C-Mod
Abstract The Alcator C-Mod control system was upgraded to digital architecture DPCS (Digital Plasma Control System). The main features of the digital system are the high flexibility, robustness and maintainability. The hardware consists of low-latency digitizers, a single processor Xeon server and …
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Enhancing Input/Output Correctness, Protection, Performance, and Scalability for Process Control Platforms
Most modern control systems use digital controllers to ensure safe operation. We modify the traditional digital control system architecture to integrate a new component known as a trusted input/output processor (TIOP). TIOP interface to the inputs (sensors) and outputs (actuators) of the system …
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A metrological atomic force microscope
… This design serves as a prototype for a similar system that will later be integrated with the Sub-Atomic Measuring Machine (SAMM) under development in collaboration with the University of North Carolina at Charlotte. The microscope uses a piezoelectric tube scanner with a quartz tuning fork …
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Design and analysis of a monolithic flexure atomic force microscope
… from propagating into the moving stage. A digital control system uses closed loop control to regulate the vertical displacement of the stage. The positioning system demonstrated a 450 Hz -3db closed loop bandwidth and 0.249 RMS noise positioning. A new probe named after its inventor Dr. …
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On the Stability and Robustness of Discrete Uncertain Systems
<p>Model reference adaptive control (MRAC) is a well-established control design framework for ensuring closed-loop system stability and reference tracking performance in dynamical systems with uncertainties. Nominal, fixed-gain controllers rely on accurate mathematical models to guarantee desired …
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A testbed to simulate cyber attacks on nuclear power plants
… both physical and cyber. The increasing usage of digital control and computer systems, for supervisory control and data acquisition in the control rooms of new generation nuclear reactors, has introduced several cyber security issues that must be addressed. One of the most significant problems is …
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Adaptive feedforward cancellation viewed from an oscillator amplitude control perspective
… Previous work has shown that classical control techniques can be used to analyze the stability and robustness of an AFC loop. However, determination of the convergence and error properties of the closed-loop system to changes in the reference or disturbance signal is not an obvious …
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Thermal stratification in solar storage tanks
… the overall efficiency of solar water heating systems. Testing of the three storage containers was carried out under similar conditions and the results showedthat TYPEI storage container behaves as a three-segment stratified system, TYPEII storage container behaves as a two-segment stratified …
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A High efficiency high power led driver with fault tolerance and multiple led load driving using a coupled Cuk converter
… is not negatively impacted. The LED driver and a digital control system are designed, with the fault-tolerant feature incorporated. The LED driver and the control system are simulated and practically implemented. The results obtained show excellent LED driver performance. The fault-tolerant …
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A comparative study of MPPT and voltage regulator controllers for controlling output voltage in PV applications
… but getting the most power out of a solar power system is a complicated task and need advanced digital control system and high efficient algorithms. Many algorithms have been developed for the maximum power point tracking (MPPT) of solar panels. However, most of the algorithms such as artificial …
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Direct digital control of D.C. machines
… thesis set out to improve on previous methods of digital control of a three phase fully controlled thyristor bridge, using phase control of the thyristors, and to use this bridge for the purpose of controlling the speed of a separately excited D. C. machine, under the supervision of a small …
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