This paper presents an approach to accelerate the simulation of shipboard power systems. A common issue in the ship research community is the simulation run time of large-scale shipboard power systems. A contributor to lengthy run times is that PC-based power system simulators do not exploit multicore technology, which stems from the fact that software trails advances in hardware. The Center fo...

Accurate ship velocity is important for determining absolute currents from acoustic Doppler current profiler (ADCP) measurements. In this paper, the authors describe the application of two methods to improve the quality of ship velocity estimates. The first uses wide-area differential global positioning system (WADGPS) navigation to improve ship positioning. During the cruise, raw global positi...

Airborne Synthetic Aperture Radar (SAR) images of sea surface often reveal ship wakes, which appear in a form of bright and dark streaks. It is believed that some of them pertain to the ship generated Kelvin wave system and some to the ship turbulent wake (Reed et al., 1990). The streaks in SAR images are sufficiently narrow to consider them as straight segments. Assuming that the location and ...

0 7 4 0 7 4 5 9 / 0 3 / $ 1 7 . 0 0 © 2 0 0 3 I E E E After initial salvage attempts, the ship was largely forgotten until Anders Franzen located it in 1956.1 In 1961, 333 years after it sank, the Vasa was raised; it was so well preserved that it could float after the gun portals were sealed and water and mud were pumped from it. The sheltered harbor had protected the ship from storms, and the ...

The aim of this paper is to present a comparative study on two different methods for the evaluation of the equilibrium point of a ship, core issue for designing an On Board Stability System (OBSS) module that, starting from geometry information of a ship hull, described by a discrete model in a standard format, and the distribution of all weights onboard calculates the ship floating conditions ...

Stricter regulations on emissions force ship owners and designers to come up with new solutions for ship propulsion systems. Hybrid drive systems consisting of prime movers and batteries, like in the Toyota Prius, show great potential, especially in special ships like harbour tugs. Economic and environmental performance of such systems strongly depends on the way it is controlled. Dynamic compu...

Naval ship design can be understood to be a networked System-ofSystems (SoS) multidisciplinary process whereby a decision on one aspect of the design may have simultaneous, multiple order effects on other aspects of the design. Modern naval ship design should therefore consider the systems of interest as components subsumed by a holistic environment encompassing assets and capabilities inorgani...

Long development times and high costs prevent robots from being practical for use in many important field missions. Here a modular design approach is proposed to produce a rapidly deployable low cost field robotic system. An inventory of components such as actuated joints, links, power supplies, and software modules are assembled to produce a field robotic system for a specified task. The propo...

The Concept and Requirements Exploration process used at Virginia Tech is based on a Multi-Objective Optimization approach that explores the design space to produce a NonDominated set of ship design solutions ranked objectively by Cost, Risk, and Effectiveness. Prior research and effort has also been made to leverage the validation and verification of the U.S. Navy’s ship synthesis design tool,...