Download or read book Preliminary Design and Cycle Verification of a Digital Autopilot for Autonomous Underwater Vehicles written by Stephen W. Delaplane and published by . This book was released on 1988 with total page 69 pages. Available in PDF, EPUB and Kindle. Book excerpt: Autonomous Underwater Vehicles (AUV's) are being considered for a diversity of U.S. Navy missions. They protend the advantages of cost effective fleet multiplication, minimal detectability, and reduced risk to personnel and high-value fleet assets. In response to the Department of the Navy and DARPA interests, AUV research and development by a number of public and private sector organizations has intensified in recent years. The Naval Postgraduate School has now built the first of a series of AUV models which will be used as test-beds for evolving automated control technologies. This thesis documents the results of initial efforts to install an on-site facility to support the design and development of a model-based digital autopilot for control of the NPS test vehicle. Keywords: Digital autopilot, Autonomous underwater, Theses, Vehicles.

Download or read book Preliminary Design and Cycle Verification of a Digital Autopilot for Autonomous Underwater Vehicles written by and published by . This book was released on 1988 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Autonomous Underwater Vehicles (AUV's) are being considered for a diversity of U.S. Navy missions. They protend the advantages of cost effective fleet multiplication, minimal detectability, and reduced risk to personnel and high-value fleet assets. In response to the Department of the Navy and DARPA interests, AUV research and development by a number of public and private sector organizations has intensified in recent years. The Naval Postgraduate School has now built the first of a series of AUV models which will be used as test-beds for evolving automated control technologies. This thesis documents the results of initial efforts to install an on-site facility to support the design and development of a model-based digital autopilot for control of the NPS test vehicle. Keywords: Digital autopilot, Autonomous underwater, Theses, Vehicles.

Download or read book Masters Theses in the Pure and Applied Sciences written by Wade H. Shafer and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 421 pages. Available in PDF, EPUB and Kindle. Book excerpt: Masters Theses in the Pure and Applied Sciences was first conceived, published, and disseminated by the Center for Information and Numerical Data Analysis and Synthesis (CINDAS) * at Purdue University in 1957, starting its coverage of theses with the academic year 1955. Beginning with Volume 13, the printing and dissemination phases of the activity were transferred to University Microfilms/Xerox of Ann Arbor, Michigan, with the thought that such an arrangement would be more beneficial to the academic and general scientific and technical community. After five years of this joint undertaking we had concluded that it was in the interest of all con cerned if the printing and distribution of the volumes were handled by an interna tional publishing house to assure improved service and broader dissemination. Hence, starting with Volume 18, Masters Theses in the Pure and Applied Sciences has been disseminated on a worldwide basis by Plenum Publishing Cor poration of New York, and in the same year the coverage was broadened to include Canadian universities. All back issues can also be ordered from Plenum. We have reported in Volume 34 (thesis year 1989) a total of 13,377 theses titles from 26 Canadian and 184 United States universities. We are sure that this broader base for these titles reported will greatly enhance the value of this important annual reference work. While Volume 34 reports theses submitted in 1989, on occasion, certain univer sities do report theses submitted in previous years but not reported at the time.

Download or read book Technical Reports Awareness Circular TRAC written by and published by . This book was released on 1988-08 with total page 518 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Development and Testing of Navigation Algorithms for Autonomous Underwater Vehicles written by Francesco Fanelli and published by Springer. This book was released on 2019-04-16 with total page 108 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book focuses on pose estimation algorithms for Autonomous Underwater Vehicles (AUVs). After introducing readers to the state of the art, it describes a joint endeavor involving attitude and position estimation, and details the development of a nonlinear attitude observer that employs inertial and magnetic field data and is suitable for underwater use. In turn, it shows how the estimated attitude constitutes an essential type of input for UKF-based position estimators that combine position, depth, and velocity measurements. The book discusses the possibility of including real-time estimates of sea currents in the developed estimators, and highlights simulations that combine real-world navigation data and experimental test campaigns to evaluate the performance of the resulting solutions. In addition to proposing novel algorithms for estimating the attitudes and positions of AUVs using low-cost sensors and taking into account magnetic disturbances and ocean currents, the book provides readers with extensive information and a source of inspiration for the further development and testing of navigation algorithms for AUVs.

Download or read book Government Reports Announcements Index written by and published by . This book was released on 1988-10 with total page 504 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book The Design Construction Outfitting and Preliminary Testing of the C SCOUT Autonomous Underwater Vehicle AUV written by Timothy Curtis and published by . This book was released on 2001 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Design Fabrication and Test of an Autonomous Underwater Vehicle written by Timothy L. Stanford and published by . This book was released on 2008 with total page 176 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Government reports annual index written by and published by . This book was released on 199? with total page 1420 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Autonomous Underwater Vehicles written by Sabiha Wadoo and published by CRC Press. This book was released on 2017-12-19 with total page 208 pages. Available in PDF, EPUB and Kindle. Book excerpt: Underwater vehicles present some difficult and very particular control system design problems. These are often the result of nonlinear dynamics and uncertain models, as well as the presence of sometimes unforeseeable environmental disturbances that are difficult to measure or estimate. Autonomous Underwater Vehicles: Modeling, Control Design, and Simulation outlines a novel approach to help readers develop models to simulate feedback controllers for motion planning and design. The book combines useful information on both kinematic and dynamic nonlinear feedback control models, providing simulation results and other essential information, giving readers a truly unique and all-encompassing new perspective on design. Includes MATLAB® Simulations to Illustrate Concepts and Enhance Understanding Starting with an introductory overview, the book offers examples of underwater vehicle construction, exploring kinematic fundamentals, problem formulation, and controllability, among other key topics. Particularly valuable to researchers is the book’s detailed coverage of mathematical analysis as it applies to controllability, motion planning, feedback, modeling, and other concepts involved in nonlinear control design. Throughout, the authors reinforce the implicit goal in underwater vehicle design—to stabilize and make the vehicle follow a trajectory precisely. Fundamentally nonlinear in nature, the dynamics of AUVs present a difficult control system design problem which cannot be easily accommodated by traditional linear design methodologies. The results presented here can be extended to obtain advanced control strategies and design schemes not only for autonomous underwater vehicles but also for other similar problems in the area of nonlinear control.

Download or read book Autonomous Underwater Vehicles written by Jing Yan and published by Springer Nature. This book was released on 2021-11-01 with total page 222 pages. Available in PDF, EPUB and Kindle. Book excerpt: Autonomous underwater vehicles (AUVs) are emerging as a promising solution to help us explore and understand the ocean. The global market for AUVs is predicted to grow from 638 million dollars in 2020 to 1,638 million dollars by 2025 – a compound annual growth rate of 20.8 percent. To make AUVs suitable for a wider range of application-specific missions, it is necessary to deploy multiple AUVs to cooperatively perform the localization, tracking and formation tasks. However, weak underwater acoustic communication and the model uncertainty of AUVs make achieving this challenging. This book presents cutting-edge results regarding localization, tracking and formation for AUVs, highlighting the latest research on commonly encountered AUV systems. It also showcases several joint localization and tracking solutions for AUVs. Lastly, it discusses future research directions and provides guidance on the design of future localization, tracking and formation schemes for AUVs. Representing a substantial contribution to nonlinear system theory, robotic control theory, and underwater acoustic communication system, this book will appeal to university researchers, scientists, engineers, and graduate students in control theory and control engineering who wish to learn about the core principles, methods, algorithms, and applications of AUVs. Moreover, the practical localization, tracking and formation schemes presented provide guidance on exploring the ocean. The book is intended for those with an understanding of nonlinear system theory, robotic control theory, and underwater acoustic communication systems.

Download or read book Autonomous Underwater Vehicles written by Frank Ehlers and published by SciTech Publishing. This book was released on 2020-08-26 with total page 591 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book gives a state-of-the-art overview of the hot topic of autonomous underwater vehicle (AUV) design and practice. It covers a wide range of AUV application areas such as education and research, biological and oceanographic studies, surveillance purposes, military and security applications and industrial underwater applications.

Download or read book Technology and Applications of Autonomous Underwater Vehicles written by Gwyn Griffiths and published by CRC Press. This book was released on 2002-11-28 with total page 369 pages. Available in PDF, EPUB and Kindle. Book excerpt: The oceans are a hostile environment, and gathering information on deep-sea life and the seabed is incredibly difficult. Autonomous underwater vehicles are robot submarines that are revolutionizing the way in which researchers and industry obtain data. Advances in technology have resulted in capable vehicles that have made new discoveries on how th

Download or read book Autonomous Underwater Vehicles written by Frank Ehlers and published by . This book was released on 2020 with total page 591 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Use of Services for Family Planning and Infertility United States 1982 written by Gerry E. Hendershot and published by . This book was released on 1988 with total page 982 pages. Available in PDF, EPUB and Kindle. Book excerpt: The 1982 statistics on the use of family planning and infertility services presented in this report are preliminary results from Cycle III of the National Survey of Family Growth (NSFG), conducted by the National Center for Health Statistics. Data were collected through personal interviews with a multistage area probability sample of 7969 women aged 15-44. A detailed series of questions was asked to obtain relatively complete estimates of the extent and type of family planning services received. Statistics on family planning services are limited to women who were able to conceive 3 years before the interview date. Overall, 79% of currently mrried nonsterile women reported using some type of family planning service during the previous 3 years. There were no statistically significant differences between white (79%), black (75%) or Hispanic (77%) wives, or between the 2 income groups. The 1982 survey questions were more comprehensive than those of earlier cycles of the survey. The annual rate of visits for family planning services in 1982 was 1077 visits /1000 women. Teenagers had the highest annual visit rate (1581/1000) of any age group for all sources of family planning services combined. Visit rates declined sharply with age from 1447 at ages 15-24 to 479 at ages 35-44. Similar declines with age also were found in the visit rates for white and black women separately. Nevertheless, the annual visit rate for black women (1334/1000) was significantly higher than that for white women (1033). The highest overall visit rate was for black women 15-19 years of age (1867/1000). Nearly 2/3 of all family planning visits were to private medical sources. Teenagers of all races had higher family planning service visit rates to clinics than to private medical sources, as did black women age 15-24. White women age 20 and older had higher visit rates to private medical services than to clinics. Never married women had higher visit rates to clinics than currently or formerly married women. Data were also collected in 1982 on use of medical services for infertility by women who had difficulty in conceiving or carrying a pregnancy to term. About 1 million ever married women had 1 or more infertility visits in the 12 months before the interview. During the 3 years before interview, about 1.9 million women had infertility visits. For all ever married women, as well as for white and black women separately, infertility services were more likely to be secured from private medical sources than from clinics. The survey design, reliability of the estimates and the terms used are explained in the technical notes.

Download or read book Design of a Hover Mode Autopilot for the Phoenix Autonomous Underwater Vehicle written by Juan Cesar Gonzalez and published by . This book was released on 1995 with total page 108 pages. Available in PDF, EPUB and Kindle. Book excerpt: The potential uses for autonomous underwater vehicles (AUV's) is gaining recognition by organizations world wide. As such, continuous research toward improving existing vehicles by seeking new designs and increasing efficiency is being funded by organizations that serve to benefit from the new technology. Some examples for which AUV's may be used include mine countermeasures, submerged structural repair or destruction, search and rescue, biological study, ocean floor and coastal survey. The goal of this thesis is to design an autopilot that will use a combination of both vertical thrusters, both horizontal thrusters, and the main screws simultaneously to control the NPS phoenix AUV's posture during hovering conditions and short transits. The control design is implemented and simulated using Common LISP object oriented programming language. The results of this thesis are favorable. Since this thesis presents only a basic approach to an autopilot design, it is believed by the author that with further improvements to the design presented, the existing hover made autopilot can eventually be upgraded with the resulting autopilot design. This upgrade would greatly increase the autopilots efficiency. (AN).

Download or read book Computational Design and Control of Autonomous Underwater Vehicles written by Juan A. Salazar and published by . This book was released on 2022 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Design of autonomous underwater vehicles (AUVs) currently relies heavily on rule-of-thumb techniques shared among those in the field, with many designs ending up with thousands of custom-made components that are not readily transferable to other designs made for different tasks. This is largely because of the complexity of designing a vehicle subject to the harsh ocean environment, which results in many interdepencies across design parameters. For the past few years, we have been developing hardware and software for SoFi, an autonomous soft robotic fish platform originally developed at MIT. Throughout our development process, we encountered a number of hardware-related obstacles concerning SoFi's many custom components, which considerably slowed down our design iteration cycle. Using an automated pipeline that can synthesize designs from a pre-defined component library relieves the design cycle from the drawbacks of rules-of-thumb and highly customized components, and enables fast computational generation and evaluation of optimal performance underwater vehicles. In this work, we first describe our design work and evaluation on the SoFi platform. Next, we present an approach in the form of a automatic graph grammar-based AUV design framework that produces locally optimal AUV designs (including structure and control) based on a task specification. Our framework randomly samples the space of AUV topologies defined by the graph grammar and simultaneously optimizes structure and control with a gradient-based method using a differentiable simulator. Finally, we summarize the results from evaluating our autonomous soft robotic platform, the results from running our AUV design framework on a simulated mission and then show that the design framework carries massive potential in accelerating the future design of SoFi and other types of AUVs, conventional or non-conventional.