• Refine Query
  • Source
  • Publication year
  • to
  • Language
  • 291
  • 71
  • 55
  • 23
  • 12
  • 7
  • 6
  • 4
  • 4
  • 2
  • 1
  • 1
  • 1
  • 1
  • 1
  • Tagged with
  • 585
  • 165
  • 122
  • 99
  • 75
  • 72
  • 71
  • 61
  • 57
  • 49
  • 45
  • 44
  • 42
  • 37
  • 36
  • 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.
91

Micro bubble actuator for DNA hybridization enhancement /

Deng, Peigang. January 2004 (has links)
Thesis (Ph. D.)--Hong Kong University of Science and Technology, 2004. / Includes bibliographical references (leaves 156-165). Also available in electronic version. Access restricted to campus users.
92

Fully compliant Tensural Bistable Mechanisms (FTBM) with on-chip thermal actuation /

Wilcox, Daniel L., January 2004 (has links) (PDF)
Thesis (M.S.)--Brigham Young University. Dept. of Mechanical Engineering, 2004. / Includes bibliographical references (p. 101-105).
93

Implementation of an actuator placement, switching algorithm for active vibration control in flexible structures

Swathanthira Kumar, Murali Murugavel Manjakkattuvalasu. January 2002 (has links)
Thesis (M.S.)--Worcester Polytechnic Institute. / Keywords: Actuator placement algorithm; piezoelectric actuators; LQR; Galerkin; supervisory control; active vibration control; FEA; switching policy; dSPACE. Includes bibliographical references (p. 58-64).
94

Effects of magnetic field models on control of electromagnetic actuators

Son, Hungsun. January 2007 (has links)
Thesis (Ph.D)--Mechanical Engineering, Georgia Institute of Technology, 2008. / Committee Chair: Lee, Kok-Meng; Committee Member: Bill Singhose; Committee Member: David G. Taylor; Committee Member: Eric Johnson; Committee Member: Nader Sadegh. Part of the SMARTech Electronic Thesis and Dissertation Collection.
95

Investigation of induced strain actuator patches implementing modeling techniques and design considerations to reduce critical stress /

Walker, John Griffith, January 1993 (has links)
Thesis (M.S.)--Virginia Polytechnic Institute and State University, 1993. / Vita. Abstract. Includes bibliographical references (leaves 150-153). Also available via the Internet.
96

Quasi-static hydraulic control systems and energy savings potential using independent metering four-valve assembly configuration

Shenouda, Amir. January 2006 (has links)
Thesis (Ph. D.)--Mechanical Engineering, Georgia Institute of Technology, 2007. / Wayne J. Book, Committee Chair ; Nader Sadegh, Committee Member ; Chris Paredis, Committee Member ; Bonnie Heck, Committee Member ; Roger Yang, Committee Member ; Renato D.C.Monteiro, Committee Member.
97

On the external stability of linear systems with actuator saturation constraints, and the decentralized control of communicating-agent networks with security constraints

Wen, Zheng, January 2007 (has links) (PDF)
Thesis (M.S. in electrical engineering)--Washington State University, August 2007. / Includes bibliographical references (p. 73-77).
98

Integrated structure/acutation synthesis for strain actuated devices /

Forster, Edwin Ewald. January 2000 (has links)
Thesis (Ph. D.)--University of Washington, 2000. / Vita. Includes bibliographical references (leaves 96-100).
99

An analysis of hydrodynamic torque converters for design applications in heavy vehicles.

Groiss, Friederich Harald 10 June 2014 (has links)
M.Ing. (Mechanical Engineering) / The automotive driveline design engineer is invariably confronted with a limited range of driveline components , the combination of which can result in a design which is far from optimal for vehicle overall performance. Due to the close interaction between the prime mover and the torque converter of an automotive driveline incorporating an automatic transmission , the requirement developed to be able to design or modify a torque converter to attain more optimal prime mover/torque converter interaction. Two torque converters of similar configuration formed the basis of this study. A test bench was developed to verifythe published characteristic of the torque converters under controlled conditions. A computer program was developed to analyse the performance of the specific torque converters. This program is similar to the program developed by Lamprecht [10] , which was further refined by the Buro of Mechanical Engineering at the University of Stellenbosch. A method was established to enable accurate and consistent geometry measurement of torque converters. The analysis program was evaluated by establishing the correlation between the theoretical and published results. Based on the results further refinement was done to the analysis program. A parametric study was done based on the geometry of the larger capacity torque converter. Five components (two impellers, two turbines and a single stator) of alternative design but interchangeable with the standard components, were designed and manufactured, These components were fitted individually and tested on the test bench to establish the correlation between the experimental results and design calculations. Recommendations for further development In the field of hydrodynamic torque converters are made
100

Rotor controlled induction machines for mine winder drives

Kane, Ian Jack 27 August 2012 (has links)
M.Ing. / Variable liquid resistors are utilised in the rotor circuit, to control mine winders using slipring induction machines. These liquid resistors have a number of disadvantages, therefore a new drive technology is required to replace liquid controllers. A number of machine drives are discussed and a comparative study is made. A 22kW resistively loaded buck chopper in the rotor, is used as a case study. Full design details and procedures are given for the chopper. These designs are verified by simulations and experimental results. A current control was designed and implemented for the buck chopper in the rotor, using a PI controller and pulse width modulation. The 22kW resistively loaded buck chopper operated exceptionally well and it is evident that it could be a viable method for replacing liquid controllers. The oscillation generated in the hoist cables are discussed and a possible counter acting acceleration method of removing these oscillations is described. A rotating oscillation system was designed and constructed for experimental purposes. From the tests undertaken on the experimental system, it was evident that by the implementation of the counter action process, it is possible to remove the oscillations in the hoist ropes.

Page generated in 0.0508 seconds