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Underwater Technology—Hydrodynamics and Control System
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Underwater Technology—Hydrodynamics and Control System

A special issue of Journal of Marine Science and Engineering (ISSN 2077-1312). This special issue belongs to the section "Physical Oceanography".

Deadline for manuscript submissions: closed (31 July 2019) | Viewed by 11915

Special Issue Editor

Prof. Dr. Yu-Hsien Lin

E-Mail Website
Guest Editor
Dept. Systems and Naval Mechatronic Engineering, National Cheng Kung University, No.1, University Rd., Tainan City 70101, Taiwan
Interests: autonomous underwater vehicle; ocean engineering; ocean renewable energy; intelligent image-base recognition and underwater guidance system
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

This Special Issue will focus on innovation in the research and development of autonomous underwater vehicles (AUVs). Over the decades, marine research and exploration have promoted the necessity of AUV industries. AUVs provide a new kind of marine research platform that has been well known as an asset in many fields of oceanographic or naval research. Besides, the ocean environment is especially challenging, and estimates of hydrodynamics and designs of control systems need to be developed towards improving the navigation performances of an AUV. This Special Issue would be the focus of the following research: (a) prototypes and trials conducted in the wave basin or ocean environments, (b) the development of control systems, (c) maneuvering capabilities and experimental tests, (d) the hydrodynamic optimization of the AUV hull form, (e) sensors and equipment, and (d) dynamic positioning.

Prof. Yu-Hsien Lin
Guest Editor

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Journal of Marine Science and Engineering is an international peer-reviewed open access monthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2600 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • AUV
  • hydrodynamics
  • control system
  • underwater technology
  • dynamic positioning

Published Papers (3 papers)

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Research

20 pages, 7456 KiB  
Article
Robust Adaptive Heading Control for a Ray-Type Hybrid Underwater Glider with Propellers
by Ngoc-Duc Nguyen, Hyeung-Sik Choi and Sung-Wook Lee
J. Mar. Sci. Eng. 2019, 7(10), 363; https://doi.org/10.3390/jmse7100363 - 11 Oct 2019
Cited by 8 | Viewed by 3207
Abstract
This paper presents the modeling of a new ray-type hybrid underwater glider (RHUG) and an experimental approach used to robustly and adaptively control heading motion. The motions of the proposed RHUG are divided into vertical-plane motions and heading motion. Hydrodynamic coefficients in the [...] Read more.
This paper presents the modeling of a new ray-type hybrid underwater glider (RHUG) and an experimental approach used to robustly and adaptively control heading motion. The motions of the proposed RHUG are divided into vertical-plane motions and heading motion. Hydrodynamic coefficients in the vertical-plane dynamics are obtained using a computational fluid dynamics (CFD) method for various pitch angles. Due to the difficulty of obtaining accurate parameter values for the heading dynamics, a robust adaptive control algorithm was designed containing an adaptation law for the unknown parameters and robust action for minimizing environmental disturbances. For robust action against bounded disturbances, such as waves and ocean currents, sliding mode control was applied under the assumption that the bounds of the external disturbances are known. A direct adaptive algorithm for heading motion was applied in an experiment. Computer simulations of the proposed robust adaptive heading control are presented to demonstrate the robustness of the proposed control system in the presence of bounded disturbances. To verify the performance of the proposed controller for heading dynamics, several heading control experiments were conducted in a water tank and in the sea. Full article
(This article belongs to the Special Issue Underwater Technology—Hydrodynamics and Control System)
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42 pages, 26216 KiB  
Article
Development of an Image Processing Module for Autonomous Underwater Vehicles through Integration of Visual Recognition with Stereoscopic Image Reconstruction
by Yu-Hsien Lin, Shao-Yu Chen and Chia-Hung Tsou
J. Mar. Sci. Eng. 2019, 7(4), 107; https://doi.org/10.3390/jmse7040107 - 18 Apr 2019
Cited by 14 | Viewed by 5072
Abstract
This study investigated the development of visual recognition and stereoscopic imaging technology, applying them to the construction of an image processing system for autonomous underwater vehicles (AUVs). For the proposed visual recognition technology, a Hough transform was combined with an optical flow algorithm [...] Read more.
This study investigated the development of visual recognition and stereoscopic imaging technology, applying them to the construction of an image processing system for autonomous underwater vehicles (AUVs). For the proposed visual recognition technology, a Hough transform was combined with an optical flow algorithm to detect the linear features and movement speeds of dynamic images; the proposed stereoscopic imaging technique employed a Harris corner detector to estimate the distance of the target. A physical AUV was constructed with a wide-angle lens camera and a binocular vision device mounted on the bow to provide image input. Subsequently, a simulation environment was established in Simscape Multibody and used to control the post-driver system of the stern, which contained horizontal and vertical rudder planes as well as the propeller. In static testing at National Cheng Kung University, physical targets were placed in a stability water tank; the study compared the analysis results obtained from various brightness and turbidity conditions in out-of-water and underwater environments. Finally, the dynamic testing results were combined with a fuzzy controller to output the real-time responses of the vehicle regarding the angles, rates of the rudder planes, and the propeller revolution speeds at various distances. Full article
(This article belongs to the Special Issue Underwater Technology—Hydrodynamics and Control System)
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27 pages, 11387 KiB  
Article
The Hydrodynamic Noise Suppression of a Scaled Submarine Model by Leading-Edge Serrations
by Yongwei Liu, Yalin Li and Dejiang Shang
J. Mar. Sci. Eng. 2019, 7(3), 68; https://doi.org/10.3390/jmse7030068 - 15 Mar 2019
Cited by 9 | Viewed by 3283
Abstract
High hydrodynamic noise is a threat to the survival of underwater vehicles. We investigated a noise suppression mechanism by putting leading-edge serrations on the sail hull of a scaled SUBOFF model, through numerical calculation and an experimental test. We found that the cone [...] Read more.
High hydrodynamic noise is a threat to the survival of underwater vehicles. We investigated a noise suppression mechanism by putting leading-edge serrations on the sail hull of a scaled SUBOFF model, through numerical calculation and an experimental test. We found that the cone shape of leading-edge serrations can decrease the intensity of the adverse pressure gradient and produce counter-rotation vortices, which destroy the formation of the horseshoe vortex and delay the tail vortex. To achieve the optimum hydrodynamic noise reduction, we summarized the parameters of leading-edge serrations. Then, two steel models were built, according to the simulation. We measured the hydrodynamic noise based on the reverberation method in a gravity water tunnel. The numerically calculated results were validated by the experimental test. The results show that leading-edge serrations with amplitudes of 0.025c and wavelengths of 0.05h can obtain hydrodynamic noise reduction of at least 6 dB, from 10 Hz to 2 kHz, where c is the chord length and h is the height of the sail hull. The results in our study suggest a new way to design underwater vehicles with low hydrodynamic noise at a high Reynolds number. Full article
(This article belongs to the Special Issue Underwater Technology—Hydrodynamics and Control System)
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