104 research outputs found
Information-Aware Guidance for Magnetic Anomaly based Navigation
In the absence of an absolute positioning system, such as GPS, autonomous
vehicles are subject to accumulation of positional error which can interfere
with reliable performance. Improved navigational accuracy without GPS enables
vehicles to achieve a higher degree of autonomy and reliability, both in terms
of decision making and safety. This paper details the use of two navigation
systems for autonomous agents using magnetic field anomalies to localize
themselves within a map; both techniques use the information content in the
environment in distinct ways and are aimed at reducing the localization
uncertainty. The first method is based on a nonlinear observability metric of
the vehicle model, while the second is an information theory based technique
which minimizes the expected entropy of the system. These conditions are used
to design guidance laws that minimize the localization uncertainty and are
verified both in simulation and hardware experiments are presented for the
observability approach.Comment: 2022 International Conference on Intelligent Robots and Systems
October 23 to 27, 2022 Kyoto, Japa
Oceanographic surveys with autonomous underwater vehicles : performance metrics and survey design
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Ocean Engineering, 1998.Includes bibliographical references (p. 127-134).by Jeffrey Scott Willcox.M.S
Technology for large space systems: A bibliography with indexes (supplement 20)
This bibliography lists 694 reports, articles, and other documents introduced into the NASA Scientific and Technical Information System between July, 1988 and December, 1988. Its purpose is to provide helpful information to the researcher or manager engaged in the development of technologies related to large space systems. Subject areas include mission and program definition, design techniques, structural and thermal analysis, structural dynamics and control systems, electronics, advanced materials, assembly concepts, and propulsion
Summary of Research 1994
The views expressed in this report are those of the authors and do not reflect the
official policy or position of the Department of Defense or the U.S. Government.This report contains 359 summaries of research projects which were carried out
under funding of the Naval Postgraduate School Research Program. A list of recent
publications is also included which consists of conference presentations and
publications, books, contributions to books, published journal papers, and
technical reports. The research was conducted in the areas of Aeronautics and
Astronautics, Computer Science, Electrical and Computer Engineering, Mathematics,
Mechanical Engineering, Meteorology, National Security Affairs, Oceanography,
Operations Research, Physics, and Systems Management. This also includes research
by the Command, Control and Communications (C3) Academic Group, Electronic Warfare
Academic Group, Space Systems Academic Group, and the Undersea Warfare Academic
Group
Recent Advances in Indoor Localization Systems and Technologies
Despite the enormous technical progress seen in the past few years, the maturity of indoor localization technologies has not yet reached the level of GNSS solutions. The 23 selected papers in this book present the recent advances and new developments in indoor localization systems and technologies, propose novel or improved methods with increased performance, provide insight into various aspects of quality control, and also introduce some unorthodox positioning methods
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