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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.
121

Feedback Controlled High Frequency Electrochemical Micromachining

Ozkeskin, Fatih Mert 10 October 2008 (has links)
Microsystem and integrated circuitry components are mostly manufactured using semiconductor technologies. Fabrication using high strength metals, for demanding aerospace, mechanical, or biomedical applications, requires novel technologies which are different from those for silicon. A promising mass production method for micro/meso scale components is electrochemical micromachining. The complex system, however, requires high precision mechanical fixtures and sophisticated instrumentation for proper process control. This study presents an electrochemical micromachining system with a closed-loop feedback control programmed using a conditional binary logic approach. The closed-loop control is realized using electrical current as the dynamic feedback signal. The control system improves material removal rate by 250% through optimizing inter electrode gap and provides robust automation reducing machining variation by 88%. The new system evokes production of higher quality microcomponents. Workpiece damage is reduced by 97% and increased feature sharpness is observed.
122

Nonlinear filtering and system identification algorithms for autonomous systems /

Brunke, Shelby Scott, January 2001 (has links)
Thesis (Ph. D.)--University of Washington, 2001. / Vita. Includes bibliographical references (leaves 131-139).
123

A study of frequency domain stability criteria in nonlinear feedback systems.

Ho, Chun-fai. January 1971 (has links)
Thesis--Ph. D., University of Hong Kong. / Mimeographed.
124

Feedback control of wave propagation patterns in excitable media

Chirila, Florin. January 2003 (has links)
Thesis (Ph. D.)--West Virginia University, 2003. / Title from document title page. Document formatted into pages; contains xii, 156 p. : ill. (some col.) + MPEG video files. Includes MPEG video files. Includes abstract. Includes bibliographical references.
125

Adaptive output feedback controllers for a class of nonlinear mechanical systems

Miwa, Hideaki 28 August 2008 (has links)
Not available / text
126

A study of frequency domain stability criteria in nonlinear feedback systems

Ho, Chun-fai., 何振輝. January 1971 (has links)
published_or_final_version / Electrical Engineering / Doctoral / Doctor of Philosophy
127

CLOSED-LOOP, SUB-OPTIMAL CONTROL EMPLOYING THE SECOND METHOD OF LIAPUNOV

Melsa, James L. January 1965 (has links)
No description available.
128

GENERATION OF SUBOPTIMAL, CLOSED LOOP GUIDANCE FOR MINIMUM TIME AIRCRAFT TRAJECTORIES

Ishihara, Teruo, 1927- January 1969 (has links)
No description available.
129

NONLINEAR OSCILLATIONS AND STABILITY OF A NUCLEAR REACTOR WITH TWO REACTIVITY FEEDBACKS

Schmidt, Theodore Reinold, 1938- January 1969 (has links)
No description available.
130

Time optimal control of discrete systems using state variable feedback

Miletich, James Michael, 1944- January 1969 (has links)
No description available.

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