Now showing items 31-40 of 70
Towards Bathymetry-Optimized Doppler Re-Navigation for AUVs
(IEEE, 2005-09-17)
This paper describes a terrain-aided re-navigation
algorithm for autonomous underwater vehicles (AUVs) built
around optimizing bottom-lock Doppler velocity log (DVL)
tracklines relative to a ship derived bathymetric map. ...
Towards High-resolution Imaging from Underwater Vehicles
(SAGE, 2007-01)
Large area mapping at high resolution underwater continues to be constrained by sensor-level environmental constraints and the mismatch between available navigation and sensor accuracy. In this paper, advances are presented ...
Sensor Fusion of Structure-from-Motion, Bathymetric 3D, and Beacon-Based Navigation Modalities
(IEEE, 2002-08-07)
This paper describes an approach for the fusion of 30
data underwater obtained from multiple sensing modalities.
In particular, we examine the combination of imagebased
Structure-From-Motion (SFM) data with bathymetric
data ...
Multi-Attribute Decision Analysis of Mandatory Ballast Water Treatment Measures in the US Great Lakes
(Pergamon; Elsevier, 2003-10)
Mandatory ballast water management, resulting in an increase of required freight rates on the St. Lawrence Seaway, could induce a modal shift away from marine transportation. Such a shift may cause such side effects as ...
High Speed Model Testing With Drag Reduction
(University of Michigan, 2004-07-01)
The hydrodynamic (and wind) forces on such a ship operating at full speed will be enormous, and the flow patterns will be very complex. The friction drag is expected to be the largest contributor to the total drag. The ...
Development of a Multi-AUV SLAM Testbed at the University of Michigan
(Oceans 2008, 2008)
This paper reports the modifications involved in preparing two commercial Ocean-Server AUV systems for simultaneous localization and mapping (SLAM) research at the University of Michigan (UMich). The UMich Perceptual ...
Toward extraplanetary under-ice exploration: Robotic steps in the Arctic
(Wiley Subscription Services, Inc., A Wiley Company, 2009-04)
This paper describes the design and use of two new autonomous underwater vehicles, Jaguar and Puma, which were deployed in the summer of 2007 at sites at 85°N latitude in the ice-covered Arctic Ocean to search for hydrothermal ...
Imaging Coral I: Imaging Coral Habitats with the SeaBED AUV
(Springer, 2004-01)
The SeaBED autonomous underwater vehicle (AUV) is a new imaging platform designed for
high resolution optical and acoustic sensing. This low cost vehicle has been specifically designed
for use in waters up to 2000 m to ...
Measurement of near-wall stratified bubbly flows using electrical impedance
(IOP Publishing Ltd, 2005-04-01)
The impedance measurement between a pair of flush-mounted electrodes was used to measure the characteristics of a stratified near-wall bubbly flow. The variation in cross electrode impedance with liquid layer thickness and ...