Results 221 to 230 of about 7,210 (250)

Robust obstacle detection for unmanned surface vehicles

MIPPR 2017: Remote Sensing Image Processing, Geographic Information Systems, and Other Applications, 2018
Obstacle detection is of essential importance for Unmanned Surface Vehicles (USV). Although some obstacles (e.g., ships, islands) can be detected by Radar, there are many other obstacles (e.g., floating pieces of woods, swimmers) which are difficult to be detected via Radar because these obstacles have low radar cross section.
Yueming Qin, Xiuzhi Zhang
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Nature and Classification of Unmanned Surface Vehicles

Vocational Education, 2023
The text describes and classifies unmanned surface vehicles (USVs). It also provides some scales for determining the autonomy of unmanned surface vehicles and raises questions about their place in the international system of laws and treaties.
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Basic navigation, guidance and control of an Unmanned Surface Vehicle

Autonomous Robots, 2008
This paper discusses the navigation, guidance and control (NGC) system of an Unmanned Surface Vehicle (USV) through extended at sea trials carried out with the prototype autonomous catamaran Charlie. In particular, experiments demonstrate the effectiveness, both for precision and power consumption, of extended Kalman filter and simple PID guidance and ...
Caccia M, Bibuli M, Bono R, Bruzzone G
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Spatial correlation for unmanned surface vehicles

2005 IEEE Antennas and Propagation Society International Symposium, 2005
The paper considers multi-sensor communications between low profile boats, such as unmanned surface vehicles (USVs), in a rough sea environment. We derive the expression of spatial correlation coefficients between two antennas, which is important in designing the configuration of multi-sensor systems.
Kurti, Gjergji., Zhang, Yimin., Amin, Moeness., Watson, Morgan.   +3 more
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Tracking Control of an Unmanned Surface Vehicle

2014
Nowaday, unmanned surface vehicle (USV) has been a special attention for marine research and surveying exploration in costal area. This paper describes an analysis about architecture and control system of a USV disposed with three fixed thrusters. Therefore, hardware and software architectures of control system will be mentioned and functions of all ...
Ngoc-Huy Tran, Hyeung-Sik Choi, Se-Hoon Baek, Hee-Young Shin   +3 more
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Development and missions of unmanned surface vehicle

Journal of Marine Science and Application, 2010
The navy and other Department of Defense organizations are increasingly interested in the use of unmanned surface vehicles (USVs) for a variety of missions and applications. The term USV refers to any vehicle that operates on the surface of the water without a crew.
Ru-jian Yan, Shuo Pang, Han-bing Sun, Yong-jie Pang   +3 more
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Obstacle detection for Unmanned Surface Vehicle

2014 International Conference on Electrical Sciences and Technologies in Maghreb (CISTEM), 2014
The goal of this paper is to present a new monocular vision system for obstacle detection to be used by USV (Unmanned Surface Vehicle). This system is based on a monocular camera placed on a known height above the waterline. The technique used to calculate the distance between camera and obstacle depends on earth geometry and requires the prior horizon
Tarek Azzabi, Samir Belhaj Amor, Samir Nejim   +2 more
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Planning for Autonomous Operation of Unmanned Surface Vehicles

2016
The growing variety and complexity of marine research and application oriented tasks requires unmanned surface vehicles (USVs) to operate fully autonomously over long time horizons even in environments with significant civilian traffic. The autonomous operations of the USV over long time horizons requires a path planner to compute paths over long ...
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Cooperative Damage Inspection with Unmanned Surface Vehicle and Micro Unmanned Aerial Vehicle at Hurricane Wilma

2006 IEEE/RSJ International Conference on Intelligent Robots and Systems, 2006
On Oct 24, 2005, Hurricane Wilma made landfall at Cape Romano, Florida. Two days later, the Center for Robot-Assisted Search and Rescue (CRASAR) deployed an iSENSYS helicopter and an unmanned surface vehicle to survey damage in parts of Marco Island, 11 miles from landfall.
Robin R. Murphy, Sam Stover, Kevin S. Pratt, Chandler Griffin   +3 more
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Course Control of Unmanned Surface Vehicle

Solid State Phenomena, 2013
The paper considers the problems of controlling a course of an Unmanned Surface Vehicle USV. To select proper course controller, following three methods were tested: PID, slide and fuzzy control. Moreover, to counteract sea current two methods were presented and compared by means of numerical research.
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