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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

Autonomous landing of a rotary unmanned aerial vehicle in a non-cooperative environment using machine vision /

Hintze, Joshua, January 2004 (has links) (PDF)
Thesis (M.S.)--Brigham Young University. Dept. of Electrical and Computer Engineering, 2004. / Includes bibliographical references (p. 57-59).
12

Coordinated UAV target assignment using distributed calculation of target-task tours /

Walker, David Hunt, January 2004 (has links) (PDF)
Thesis (M.S.)--Brigham Young University. Dept. of Mechanical Engineering, 2004. / Includes bibliographical references (p. 103-107).
13

Minimum-energy flight paths for UAVs using mesoscale wind forecasts and approximate dynamic programming /

Nachmani, Gil. January 2007 (has links) (PDF)
Thesis (M.S. in Operations Research)--Naval Postgraduate School, December 2007. / "December 2007." Thesis advisor: Royset, Johannes O. Performed by Naval Postgraduate School, Monterey, CA. Includes bibliographical references (p. 57-60). Also available online from the Naval Postgraduate School (NPS), Dudley Knox Library site and the DTIC Online site.
14

Dynamic stability and handling qualities of small unmanned-aerial-vehicles /

Foster, Tyler M. January 2005 (has links) (PDF)
Thesis (M.S.)--Brigham Young University. Dept. of Mechanical Engineering, 2005. / Includes bibliographical references (p. 97-98).
15

Real-time evaluation of vision-based navigation for autonomous landing of a rotorcraft unmanned aerial vehicle in a non-cooperative environment /

Rowley, Dale D., January 2005 (has links) (PDF)
Thesis (M.S.)--Brigham Young University. Dept. of Mechanical Engineering, 2005. / Includes bibliographical references (p. 127-129).
16

Aerial robot navigation in cluttered urban environments

Shi, Dongqing. Collins, Emmanuel G. January 2006 (has links)
Thesis (Ph. D.)--Florida State University, 2006. / Advisor: Emmanuel G. Collins, Jr., Florida State University, College of Engineering, Dept. of Mechanical Engineering. Title and description from dissertation home page (viewed Sept. 21, 2006). Document formatted into pages; contains xiii, 87 pages. Includes bibliographical references.
17

Frequency and polarization diversity simulations for Urban UAV communication and data links

Pala, Fatih. 09 1900 (has links)
Approved for public release, distribution is unlimited / The purpose of this research was to examine the effects of frequency, and polarization on radio wave propagation in urbanized areas for unmanned aerial vehicle (UAV) data links, and command and control. The transmission from a UAV operating over a small city was simulated using the Urbana Wireless Toolset. Parameters that were varied include frequency, antenna polarization, UAV altitude, and building materials. Multiple reflections and diffractions were included in the simulation. In each case signal contours were generated at discrete frequencies over a 50 MHz bandwidth. It was observed that the signal levels varied up to over the bands at a fixed observation point due to frequency-dependent reflection and diffraction. / 1st Lieutenant, Turkish Air Force
18

Analysis of the Vertical Takeoff and landing Unmanned Aerial Vehicle (VTUAV) in small unti urban operations

Cason, Roman K. 09 1900 (has links)
Approved for public release; distribution is unlimited. / The Marine Corps has recently embarked on the development of a Vertical Takeoff and Landing Unmanned Aerial Vehicle (VTUAV) to replace the aging Pioneer system. This thesis examines the critical elements this platform must possess in order to effectively support small units operating in urban environments. We address this issue by creating and exploring an agentbased simulation of a platoon conducting an urban patrol in a setting similar to those currently being encountered in Iraq. The platoon utilizes the VTUAV as an intelligence-gathering asset. We use an efficient designed experiment to generate data from the simulation scenario, and then use multiple regression and regression trees to relate the UAV capabilities to the patrol's operational effectiveness. Our results suggest that the effectiveness of a VTUAV is greatly influenced by noise in the urban warfare environment. We use a loss function, along with the regression models, to identify UAV configurations that improve operational effectiveness yet are robust to uncertainties about civilian and insurgent behavior. The VTUAV must have high communication capability, as well as accurate sensing, in order to perform well across a range of environmental conditions. / Captain, United States Marine Corps
19

Use of an acoustic network as an underwater positioning system

Reed, Michael S. 06 1900 (has links)
Underwater acoustic networks provide an interface between UUVs and surface or land-based control systems. By exploiting range data measured incidental to communications on these networks it is possible to perform underwater positioning similar to that of the satellite-based GPS program. In this thesis, several algorithms for generating position fixes from these range data are implemented, tested, and evaluated with synthetic data. The algorithms are then applied to data obtained during operations at sea. / US Nany (USN) author.
20

Unmanned aerial vehicle routing problem with limited risk

Visoldilokpun, Siriwat. January 2008 (has links)
Thesis (Ph.D.) -- University of Texas at Arlington, 2008.

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