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 208 for “"Closed-loop control"”.
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Closed-Loop Control of HCCI Engine Dynamics
The topic of the thesis is control of Homogeneous Charge Compression Ignition (HCCI) engine dynamics. HCCI offers a potential to combine high efficiency with very low emissions. In order to fulfill the potential benefits, closed-loop control is needed. The thesis discusses sensors, feedback signals …
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Investigation of Closed-Loop Control of Polyatomic Molecules
ABSTRACT Investigation of Closed-Loop Control of Polyatomic Molecules Lalinda N. Palliyaguru Doctor of Philosophy Temple University, 2009 Doctoral Advisory Committee Chair: Prof. Robert J. Levis Experimental results that are based on mass spectral data, in this thesis includes …
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Closed loop control of forming stability during aluminum stamping
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 1994.
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Closed-loop control of forming stability during metal stamping
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 1989.
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High Fidelity Studies in Closed-Loop Control of Unsteady Aerodynamics
… and explore the success of a nonlinear, closed loop flow control strategy based on POD-ROM focusing on boundary-layer transitional flow in high-fidelity computational studies involving FDL3DI ILES code. Controlling the boundary-layer transition from laminar to turbulent allows the laminar …
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Development of a Closed Loop Control System for Vibratory Milling
… can lead to improvements when applied in a controlled manner. Vibration assisted machining is a technique in which a certain frequency of vibration is applied to the cutting tool or the Workpiece to achieve better cutting performance The aim of this project is to apply vibration to the …
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Spatial frequency based closed-loop control of sheet metal forming
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 1987.
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Closed-loop control of spacecraft formations with applications on SPHERES
… with a monolithic spacecraft. Successful control of a formation of spacecraft can be divided into two separate stages. The first stage creates a plan that meets a set of mission objectives, and the second stage implements the plan. Plans are specified as a sequence of [delta]V commands …
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Closed Loop Control of Muscle Contraction using Functional Electrical Stimulation
… The goal of this work is two-fold: develop control techniques for muscle contraction to optimize muscle stimulation and develop a small-scale electromagnetic system to provide stimulation to the laryngeal muscles for patients with vocal fold paralysis. These studies; therefore, focus on …
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Development of A closed Loop Control System for Vibration Assisted Grinding
… approach, i.e. the process to be quantitatively controlled and optimized rather than carried out in a trial-and-error manner. Vibration assisted machining been has demonstrated to reduce the amount of forces, pattern definition on a finished surface. Axial oscillation (parallel to the wheel axis) …
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Integrated through -wafer optical monitoring of MEMS for closed -loop control
… simple MEMS, and allows for the application of closed-loop control. Preliminary through-wafer optical monitoring research efforts have shown that through-wafer optical probing is suitable for characterizing and measuring the behavior of lateral harmonic oscillators.;This presentation will …
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Closed-loop control of vortex shedding by means of Lorentz force
… to cross-stream structural vibrations. Flow control to either delay the appearance of vortex shedding or fully suppress it has attracted much attention during the last decade. The focus of this dissertation is to control vortex shedding from a circular cylinder by applying an external …
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PREDICTION AND CLOSED-LOOP CONTROL OF BLOOD PRESSURE FOR HEMORRHAGE RESUSCITATION
… The second method is an observer-based feedback controller which regulates blood pressure from a hypotensive state back to a “healthy” setpoint. The controller was designed using linear matrix inequality (LMI) techniques to ensure it was absolutely stable, which let a portion of the hemodynamic …
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Smart Additive Manufacturing Using Advanced Data Analytics and Closed Loop Control
… feature extraction, process modeling, and closed-loop quality control. These methods are successfully validated by a typical AM process, namely, fused filament fabrication (FFF). Specifically, four new methodologies are proposed and developed as listed below, (1) To capture the variation of …
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A comparison of software engines for simulation of closed-loop control systems
A wide array of control system design and simulation software engines is available in market. It includes MATLAB-Simulink, LabVIEW, Maple-MapleSim, Scilab-Scicos, VisSim and Mathematica-Control Professional Suite (CPS). Among all of them MATLAB-Simulink is dominant and widely used software engine. …
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Closed-Loop Control of Mesoscale Magnetic Robots Using a Global Magnetic Field
… on optimization studies for the MMRS designs and control techniques used experimentally to remove thrombi from a bifurcating vascular model. The dissertation also presents data-driven models to improve MMRS’s 3D path-following performance of a time-delayed sensing system. An algorithm for 2.5D …
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Closed Loop Control for a Piezoelectric-Resonator-Based DC-DC Power Converter
… instantaneous power transfer. However, closed-loop control of PR-based dc-dc converters is necessary for them to be practically viable. Implementation of this closed loop control is challenging because achieving all desired high-efficiency behaviors requires simultaneous control of duty …
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Closed loop control of full penetration welds using optical sensing of backbead width
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 1982.
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