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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
231

Power feedback control in cylindrical grinding process

Hecker, Rogelio Lorenzo 05 1900 (has links)
No description available.
232

Influence of load perturbations on the time-response of an incremental digital feedback numerical control machine tool

Suzan, Jean-Louis 12 1900 (has links)
No description available.
233

Design of a mechanical phase plane time response analyzer

Scraggs, Charles Richard 08 1900 (has links)
No description available.
234

Command generation for flexible systems using numerator dynamics and sliding mode control

Ooten, Erika Ann 12 1900 (has links)
No description available.
235

Modeling for high-speed high-strength precision optical fiber drawing

Tchikanda, Serge William 05 1900 (has links)
No description available.
236

Output Feedback Control and Optimal Bandwidth Allocation of Networked Control Systems

Dong, Jiawei 03 October 2013 (has links)
A networked control system (NCS) is a control system where sensors, actuators, and controllers are interconnected over a communication network. This dissertation presents a framework for modeling, stability analysis, optimal control, and bandwidth allocation of the NCS. A ball magnetic-levitation (maglev) system, four DC motor speed-control systems, and a wireless autonomous robotic wheelchair are employed as test beds to illustrate and verify the theoretical results of this dissertation. This dissertation first proposes an output feedback method to stabilize and control the NCSs. The random time delays in the controller-to-actuator and sensor-to-controller links are modeled with two time-homogeneous Markov chains while the packet losses are treated with Dirac delta functions. An asymptotic mean-square stability criterion is established to compensate for the network-induced random time delays and packet losses in the NCS. Then, an algorithm to implement the asymptotic mean-square stability criterion is presented. Experimental results illustrate effectiveness of the proposed output feedback method compared to conventional controllers. The proposed output feedback controller could reduce the errors of the NCS by 13% and 30–40% for the cases without and with data packet losses, respectively. The optimal bandwidth allocation and scheduling of the NCS with nonlinear-programming techniques is also presented in the dissertation. The bandwidth utilization (BU) of each client is defined in terms of its sampling frequency. Two nonlinear approximations, exponential and quadratic approximations, are formulated to describe the system performance governed by discrete-time integral absolute error (DIAE) versus sampling frequency. The optimal sampling frequencies are obtained by solving the approximations with Karush-Kuhn-Tucker (KKT) conditions. Simulation and experimental results are given to verify the effectiveness of the proposed approximations and the bandwidth allocation and scheduling algorithms. In simulations and experiments, the two approximations could maximize the total BU of the NCS up to about 98% of the total available network bandwidth.
237

Search-based methods for computer-aided controller design improvement

Frazier, William Garth. January 1993 (has links)
Thesis (Ph. D.)--Ohio University, June, 1993. / Title from PDF t.p.
238

Frequency domain analysis of sampled-data control systems /

Braslavsky, Julio Hernán. January 1995 (has links)
Thesis (Ph. D.)--University of Newcastle, 1995. / "The Department of Electrical and Computer Engineering, the University of Newcastle." Includes bibliographical references (p. [137]-143) and index. Also available online.
239

A method of compensator design for discrete systems which bounds both the closed-loop and compensator eigenvalues

Bartholomew, David L. January 1995 (has links)
Thesis (Ph. D.)--Ohio University, November, 1995. / Title from PDF t.p.
240

A reduced order controller design method based on the Youla parameterization of all stabilizing controllers

Glenn, Russell David. January 1995 (has links)
Thesis (Ph. D.)--Ohio University, November, 1995. / Title from PDF t.p.

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