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Oceanic Engineering, IEEE Journal of

Issue 2 • Date April 2008

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Displaying Results 1 - 20 of 20
  • Table of contents

    Publication Year: 2008 , Page(s): C1
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  • IEEE Journal of Oceanic Engineering publication information

    Publication Year: 2008 , Page(s): C2
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  • Editorial: Excellence in Review

    Publication Year: 2008 , Page(s): 57 - 58
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  • Open-Loop Control of a Multifin Biorobotic Rigid Underwater Vehicle

    Publication Year: 2008 , Page(s): 59 - 68
    Cited by:  Papers (24)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (1433 KB) |  | HTML iconHTML  

    This paper presents an open-loop control system for a new experimental vehicle, named the biorobotic autonomous underwater vehicle (BAUV). The rigid cylindrical hull of the vehicle is attached with six strategically located fins to produce forces and moments in all orthogonal directions and axes with minimal redundancy. The fins are penguin-wing inspired and they implement the unsteady high-lift p... View full abstract»

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  • H_{2} and H_{\infty } Designs for Diving and Course Control of an Autonomous Underwater Vehicle in Presence of Waves

    Publication Year: 2008 , Page(s): 69 - 88
    Cited by:  Papers (12)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (1901 KB) |  | HTML iconHTML  

    H 2 and H infin designs applied to the diving and course control of an autonomous underwater vehicle (AUV) considering the presence of wave disturbances are described. The six-degrees-of-freedom equations of motion of the vehicle are described as a linear model and divided into three noninteracting (or lightly interacting) subsystems for speed control, steering,... View full abstract»

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  • Robust Nonlinear Path-Following Control of an AUV

    Publication Year: 2008 , Page(s): 89 - 102
    Cited by:  Papers (30)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (1471 KB) |  | HTML iconHTML  

    This paper develops a robust nonlinear controller that asymptotically drives the dynamic model of an autonomous underwater vehicle (AUV) onto a predefined path at a constant forward speed. A kinematic controller is first derived, and extended to cope with vehicle dynamics by resorting to backstepping and Lyapunov-based techniques. Robustness to vehicle parameter uncertainty is addressed by incorpo... View full abstract»

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  • Visually Augmented Navigation for Autonomous Underwater Vehicles

    Publication Year: 2008 , Page(s): 103 - 122
    Cited by:  Papers (30)  |  Patents (1)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (3634 KB) |  | HTML iconHTML  

    As autonomous underwater vehicles (AUVs) are becoming routinely used in an exploratory context for ocean science, the goal of visually augmented navigation (VAN) is to improve the near-seafloor navigation precision of such vehicles without imposing the burden of having to deploy additional infrastructure. This is in contrast to traditional acoustic long baseline navigation techniques, which requir... View full abstract»

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  • Thrust Characterization of a Bioinspired Vortex Ring Thruster for Locomotion of Underwater Robots

    Publication Year: 2008 , Page(s): 123 - 132
    Cited by:  Papers (28)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (1007 KB) |  | HTML iconHTML  

    A new type of thrusting technology, loosely inspired by the locomotion of cephalopods, offers promising low-speed maneuvering capabilities for a new generation of underwater vehicles and robots. The actuators consist of a small cavity with a moving wall on one side and an orifice on the other side. The net effect of periodic movement of the moving wall is the ingestion of low-momentum fluid inside... View full abstract»

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  • A Practical Approach to Modeling and Identification of Small Autonomous Surface Craft

    Publication Year: 2008 , Page(s): 133 - 145
    Cited by:  Papers (9)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (1784 KB) |  | HTML iconHTML  

    This paper discusses the theoretical model of an autonomous surface craft (ASC) with respect to the performance of basic sensors usually available onboard small and relatively low- cost vessels. The aim is to define a practical model and the corresponding identification procedure for simulation, guidance, and control of this class of vehicles. The work is supported by the extended at-sea trials ca... View full abstract»

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  • Tracking Large Marine Predators in Three Dimensions: The Real-Time Acoustic Tracking System

    Publication Year: 2008 , Page(s): 146 - 157
    Cited by:  Papers (5)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (1626 KB) |  | HTML iconHTML  

    Large marine predators like sharks and whales can have a substantial influence on oceanic ecosystems, and characterizing their interactions with the physical and biological environment is an important goal in marine ecology. Studies of foraging ecology are of particular importance, but sampling prey aggregations encountered by these predators is extremely difficult because of the small spatial sca... View full abstract»

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  • Array Modeling of Active Sonar Clutter

    Publication Year: 2008 , Page(s): 158 - 170
    Cited by:  Papers (3)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (994 KB) |  | HTML iconHTML  

    Active sonar systems operating in shallow-water environments often deal with excessive false alarms, generically referred to as clutter, that are more numerous than expected for Rayleigh-distributed reverberation. The clutter probability density function, and therefore the probability of false alarm (P fa), depends on the scattering sources, propagation conditions, sonar system, ... View full abstract»

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  • Design and Capacity Analysis of Cellular-Type Underwater Acoustic Networks

    Publication Year: 2008 , Page(s): 171 - 181
    Cited by:  Papers (11)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (793 KB) |  | HTML iconHTML  

    The design of a cellular underwater network is addressed from the viewpoint of determining the cell size and the frequency reuse pattern needed to support a desired number of users operating over a given area within a given system bandwidth. By taking into account the basic laws of underwater acoustic propagation, it is shown that unlike in the terrestrial radio systems, both the cell radius R<... View full abstract»

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  • An Iterative Equalization and Decoding Approach for Underwater Acoustic Communication

    Publication Year: 2008 , Page(s): 182 - 197
    Cited by:  Papers (10)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (831 KB) |  | HTML iconHTML  

    In this paper, we present an iterative approach for recovering information sent over a shallow underwater acoustic (UWA) communication channel. The procedure has three main tasks: estimation of channel model parameters (CMPs), channel equalization, and decoding. These tasks are performed cyclicly until the algorithm converges. Information bits are convolutionally encoded, punctured and permuted, m... View full abstract»

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  • Multicarrier Communication Over Underwater Acoustic Channels With Nonuniform Doppler Shifts

    Publication Year: 2008 , Page(s): 198 - 209
    Cited by:  Papers (137)  |  Patents (2)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (1877 KB) |  | HTML iconHTML  

    Underwater acoustic (UWA) channels are wideband in nature due to the small ratio of the carrier frequency to the signal bandwidth, which introduces frequency-dependent Doppler shifts. In this paper, we treat the channel as having a common Doppler scaling factor on all propagation paths, and propose a two-step approach to mitigating the Doppler effect: 1) nonuniform Doppler compensation via resampl... View full abstract»

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  • Understanding and Interpretations for Mutual Coupling Within Sonar Arrays

    Publication Year: 2008 , Page(s): 210 - 214
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (217 KB) |  | HTML iconHTML  

    In this paper, understanding and interpretations for mutual coupling within sonar arrays are given. Mathematically, our past mutual-coupling understanding of electromagnetic waves is successfully extended to treat acoustic sonar arrays. Physically, new acoustic-wave interpretations are given in this study. Numerical examples converge very fast and show that our mutual-coupling understanding for so... View full abstract»

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  • A Simplified Subspace Fitting Method for Estimating Shape of a Towed Array

    Publication Year: 2008 , Page(s): 215 - 223
    Cited by:  Papers (2)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (1569 KB) |  | HTML iconHTML  

    Although the existing array shape estimation methods using reference sources demonstrate good performance, most of the methods require at least two reference sources 2RS in known locations and the reference sources must be in far field. This communication proposes a simplified subspace fitting method that uses only a single reference source 1RS. In the proposed method, the horizontal and vertical ... View full abstract»

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  • Sparse Cylindrical Sonar Arrays

    Publication Year: 2008 , Page(s): 224 - 231
    Cited by:  Papers (3)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (939 KB) |  | HTML iconHTML  

    Sparse arrays offer a means for reducing the cost and complexity of beamforming systems. Most of the work in the literature has focused on sparse linear arrays with isotropic transducer elements, which simplifies analysis greatly. In this paper, we will focus on multibeam cylindrical arrays using highly directive elements for use in fishery applications, which requires a direction- ally independen... View full abstract»

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  • Special issue on Non-Rayleigh reverberation and clutter

    Publication Year: 2008 , Page(s): 232
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  • IEEE Oceanic Engineering Society Information

    Publication Year: 2008 , Page(s): C3
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  • Blank page [back cover]

    Publication Year: 2008 , Page(s): C4
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Aims & Scope

The IEEE Journal of Oceanic Engineering (ISSN 0364-9059) is published quarterly by the IEEE Oceanic Engineering Society (IEEE OES). The scope of the Journal is the field of interest of the IEEE OES, which encompasses all aspects of science, engineering, and technology that address research, development, and operations pertaining to all bodies of water. This includes the creation of new capabilities and technologies from concept design through prototypes, testing, and operational systems to sense, explore, understand, develop, use, and responsibly manage natural resources.

Full Aims & Scope

Meet Our Editors

Editor-in-Chief
N. Ross Chapman
School of Earth & Ocean Sciences
University of Victoria
3800 Finnerty Road
Victoria, BC V8P 5C2 Canada
chapman@uvic.ca