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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.
11

Overmolded substrate on aluminum metal backing for harsh environment applications

Ridenour, Joshua David, Evans, John L., January 2008 (has links) (PDF)
Thesis (M.S.)--Auburn University, 2008. / Abstract. Vita. Includes bibliographical references (p. 107-109).
12

Probabilistic timing verification and timing analysis for synthesis of digital interface controllers

Escalante, Marco Antonio 08 September 2017 (has links)
In this dissertation we present two techniques on the topic of digital interface design: a probabilistic timing verification and a timing analysis for synthesis, both rooted in a formal specification. Interface design arises when two digital components (e.g., a processor and a memory device) are to be interconnected to build up a system. We have extended a Petri net specification to describe the temporal behavior of the interface protocols of digital components. The specification describes circuit delays as random variables thus making it suitable to model process variations and timing correlation. Interface probabilistic timing verification checks that a subsystem, composed of components to be interconnected and the associated interface logic, satisfies the timing constraints specified by the components' specifications. Our verification technique not only yields tighter results than previous techniques that do not take timing correlation into consideration but also, if the timing constraint is not satisfied, determines the probability that a constraint will be violated. The second technique, timing analysis for synthesis, finds tight bounds on the delays of the interface logic, which are unknown prior to synthesis, such that all the timing constraints given in the component specifications are satisfied. / Graduate
13

A PMAC motor drive with a minimum number of sensors / Li Ying.

Li, Ying, 1963 Mar. 3- January 2002 (has links)
"October 2002" / Bibliography: p. 219-228. / xi, 229 p. : ill. (some col.), plates (col.) ; 30 cm. / Title page, contents and abstract only. The complete thesis in print form is available from the University Library. / Proposes a robust indirect position sensing technique implemented in real time using a DSP based motor controller. This is based on a rotor position estimation using the measured phase voltages and currents of the motor. An incremental algorithm is used to estimate the flux linkage increments, which eliminates the integration involved in the flux linkage estimation. This feature provides a wider operating speed range and robustness. / Thesis (Ph.D.)--University of Adelaide, Dept. of Electrical and Electronic Engineering, 2002
14

An automatic depth control system for the On-the-Go Soil Strength Sensor

Smith, Clifford Warren, Raper, Randy L. Hung, John Y. January 2007 (has links) (PDF)
Thesis(M.S.)--Auburn University, 2007. / Abstract. Vita. Includes bibliographic references.
15

A linear CMOS tunable active resistor

Hill, Bradford K., Greene, Michael E., January 2008 (has links) (PDF)
Thesis (M.S.)--Auburn University, 2008. / Abstract. Vita. Includes bibliographical references (p. 47-48).
16

Active control of a distributed force feedback glove for virtual reality environments

Dazkir, Ahmet Goktug, January 2008 (has links) (PDF)
Thesis (M.S. in mechanical engineering)--Washington State University, August 2008. / Includes bibliographical references (p. 134-137).
17

A universal controller for a single-phase uninterruptible power supply system /

Cheng, Limin, January 1998 (has links)
Thesis (M. Eng.), Memorial University of Newfoundland, 1999. / Bibliography: p. 113-115.
18

Digital control of a series-loaded resonant converter : a thesis submitted in partial fulfilment of the requirements for the degree of Master of Engineering in Electrical and Electronic Engineering at the University of Canterbury, Christchurch, New Zealand /

Chang, Yu-kun. January 1900 (has links)
Thesis (M.E.)--University of Canterbury, 2006. / Typescript (photocopy). "March 2006." Includes bibliographical references (p. [83]-84). Also available via the World Wide Web.
19

Design and implementation of a DSP based controller for power electronic applications

Van Heerden, Gerhard Johann 04 1900 (has links)
Thesis (MScIng)--University of Stellenbosch, 2003. / ENGLISH ABSTRACT: In the field of power electronic engineering, there is a need for a reconfigurable power electronic controller. Such a controller will enable engineers to stay focussed on their main field of study, not being side-tracked by the process of designing a high-speed digital controller to implement their ideas with. The design, construction and implementation of such a controller is presented in this paper. The design process involved defining the specifications of the controller and finding electronic components to satisfy them. After suitable components had been identified, a schematic design of the system was done. The netlist of the schematic was exported to a printed circuit board (PCB) design program, where the final layout was done and the connections between the devices routed. Before the PCB was manufactured, the firmware for the programmable logic devices (PLDs) was written to ensure that it fits in the selected PLDs of the system. After the PCB was manufactured and all its components fitted, it was tested and eventually used to implement the control of a shunt active power filter. / AFRIKAANSE OPSOMMING: Wanneer navorsing gedoen word in die drywings-elektronika gebied, word ’n behoefte vir ’n heropstelbare drywings-elektroniese beheerder ondervind. So ’n beheerder sal ingenieurs in staat stel om gefokus te bly op hulle hoof studieveld, sonder dat hulle aandag hoef te skenk daaraan om ’n ho¨e spoed digitale beheerder te ontwerp om hulle idees mee te implementeer. Die ontwerp, konstruksie en implementering van so ’n beheerder word in hierdie tesis voorgelˆe. Die ontwerp behels die bepaling van die spesifikasies van die beheerder en die opsporing van elektroniese komponente wat hierdie spesifikasies sal bevredig. Nadat geskikte komponente gevind is, is ’n skematiese ontwerp van die hele beheerder gedoen. Die lys van die verbindings tussen die komponente (Eng. netlist) is na die stroombaanbord ontwerp program gestuur, waar die finale uitleg van die bord gedoen is. Voordat die bord gemaak kon word, is die programmatuur vir die programmeerbare logikatoestelle geskryf om te verseker dat dit in die toestelle wat in die sisteem gebruik word, sal pas. Nadat die stroombaanborde vervaardig is en al die komponente daarop gemonteer is, is die bord getoets en uiteindelik gebruik om die beheer van ’n aktiewe drywingsfilter te implementeer.
20

Control of sit-to-stand exoskeleton with human in the loop.

Tchonko, Hervé Patrick. January 2014 (has links)
M. Tech. Electrical engineering. / Discusses the process of standing from a chair is the first movement to be affected by physical impairment or ageing. That justified the increase of researches around sit-to-stand movements nowadays.This thesis presents the design of a four links wearable device that can assist disable people to stand from a sitting position. The four links are joined at the ankle, the knee and the HAT (Head, Arm and Trunk) where actuators are mounted. The system is built around three controllers. The Goal Controller drives the links along their reference trajectories, the Stability Controller makes sure that the system does not collapse as it is rising, and the last controller combines the signal from the 2 first ones.The reference trajectories are obtained from data recorded from healthy people performing the movement. The main idea behind the present design is that from seat off, the floor projection of the body centre of pressure is evaluated and compared to the most stable position. The stability controller generates the torque necessary to compensate the deviation, while the third controller adjusts the level of participation of that torque to satisfy both the trajectory and the stability objectives. Similar idea was previously found in Prinz (2010).

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