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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.
1

Navigation of autonomous mobile robots

Keepence, B. S. January 1988 (has links)
No description available.
2

Digital bank-to-turn control and guidance

McConnell, George January 1988 (has links)
No description available.
3

Fuzzy logic control of an automated guided vehicle

Baxter, Jeremy January 1994 (has links)
This thesis describes the fuzzy logic based control system for an automated guided vehicle ( AGV ) designed to navigate from one position and orientation to another while avoiding obstacles. A vehicle with an onboard computer system and a beacon based location system has been used to provide experimental confirmation of the methods proposed during this research. A simulation package has been written and used to test control techniques designed for the vehicle. A series of navigation rules based upon the vehicle's current position relative to its goal produce a fuzzy fit vector, the entries in which represent the relative importance of sets defined over all the possible output steering angles. This fuzzy fit vector is operated on by a new technique called rule spreading which ensures that all possible outputs have some activation. An obstacle avoidance controller operates from information about obstacles near to the vehicle. A method has been devised for generating obstacle avoidance sets depending on the size, shape and steering mechanism of a vehicle to enable their definition to accurately reflect the geometry and dynamic performance of the vehicle. Using a set of inhibitive rules the obstacle avoidance system compiles a mask vector which indicates the potential for a collision if each one of the possible output sets is chosen. The fuzzy fit vector is multiplied with the mask vector to produce a combined fit vector representing the relative importance of the output sets considering the demands of both navigation and obstacle avoidance. This is operated on by a newly developed windowing technique which prevents any conflicts produced by this combination leading to an undesirable output. The final fit vector is then defuzzified to give a demand steering angle for the vehicle. A separate fuzzy controller produces a demand velocity. In tests carried out in simulation and on the research vehicle it has been shown that the control system provides a successful guidance and obstacle avoidance scheme for an automated vehicle.
4

Real-time processing techniques for infra-red image understanding

Irwin, Philip D. S. January 1989 (has links)
No description available.
5

Estimation for homing guidance

Kee, Ronald James January 1992 (has links)
No description available.
6

Modern filter-controllers for bank-to-turn CLOS guidance

Fleming, Ronald John January 1987 (has links)
No description available.
7

A multi-loop guidance scheme using singular perturbation and linear quadratic regulator techniques simultaneously /

Bushong, Philip Merton, January 1991 (has links)
Thesis (Ph. D.)--Virginia Polytechnic Institute and State University, 1991. / Vita. Abstract. Includes bibliographical references (leaves 68-71). Also available via the Internet.
8

PRECOMPUTED STATE DEPENDENT DIGITAL CONTROL OF A NUCLEAR ROCKET ENGINE

Johnson, Morris Ray, 1937- January 1972 (has links)
No description available.
9

A study of guidance controllers for homing missiles /

Stockum, Larry Allen January 1974 (has links)
No description available.
10

Real-time guidance and propulsion control for single-stage-to-orbit airbreathing vehicles

Corban, J. Eric 12 1900 (has links)
No description available.

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