2007 Symposium on Underwater Technology and Workshop on Scientific Use of Submarine Cables and Related Technologies最新文献_第9页

Optimal Control of an Underwater Vehicle with Single Actuator 单作动器水下机器人的最优控制

2007 Symposium on Underwater Technology and Workshop on Scientific Use of Submarine Cables and Related Technologies Pub Date : 2007-04-17 DOI: 10.1109/UT.2007.370779

M. S. Arslan, N. Fukushima, I. Hagiwara

引用次数: 6

Detecting, Tracking and Classifying Animals in Underwater Observatory Video 水下观测视频中动物的检测、跟踪和分类

2007 Symposium on Underwater Technology and Workshop on Scientific Use of Submarine Cables and Related Technologies Pub Date : 2007-04-17 DOI: 10.1109/UT.2007.370827

D. Edgington, D. Cline, J. Mariette, I. Kerkez

引用次数: 2

A Ship-borne Lidar System for Measurement of Ocean Chlorophyll Profiles 用于测量海洋叶绿素剖面的舰载激光雷达系统

2007 Symposium on Underwater Technology and Workshop on Scientific Use of Submarine Cables and Related Technologies Pub Date : 2007-04-17 DOI: 10.1109/UT.2007.370750

M. Sasano, N. Kiriya

引用次数: 0

Motion Simulation of an Underwater Vehicle with Mechanical Pectoral Fins Using a CFD-based Motion Simulator 基于cfd运动模拟器的机械胸鳍水下航行器运动仿真

2007 Symposium on Underwater Technology and Workshop on Scientific Use of Submarine Cables and Related Technologies Pub Date : 2007-04-17 DOI: 10.1109/UT.2007.370747

Hiroyoshi Suzuki, Naomi Kato, T. Katayama, Y. Fukui

{"title":"Motion Simulation of an Underwater Vehicle with Mechanical Pectoral Fins Using a CFD-based Motion Simulator","authors":"Hiroyoshi Suzuki, Naomi Kato, T. Katayama, Y. Fukui","doi":"10.1109/UT.2007.370747","DOIUrl":"https://doi.org/10.1109/UT.2007.370747","url":null,"abstract":"The inspection of coastal and offshore structures is important for their life cycle assessment. We have been developing an underwater vehicle equipped with two pairs of mechanical pectoral fins for this mission. If underwater vehicles are used as an automatic inspection system, the determination of the desired levels of guidance and control law for the underwater vehicle is essential. However, since the inflow velocity to the fins is under the influence of the wake generated by the body, numerical methods must be used to predict hydrodynamic force generated by the fins. Therefore, we began working on a project for developing a numerical motion simulator for the underwater vehicle equipped with mechanical pectoral fins. We had already developed a CFD-based motion simulator. However the computational results were fairly different from the measured data. Therefore, we tried to improve this motion simulator from the viewpoint of hydrodynamic drag of the fuselage of the underwater vehicle. Using the improved motion simulator, the computation of the motion of the underwater vehicle with simple fin motion is carried out. As the result, the computed data shows good agreement with the measured one. The motion control simulation with Fuzzy control algorithm is also carried out. It is confirmed using the motion control simulator works well.","PeriodicalId":345403,"journal":{"name":"2007 Symposium on Underwater Technology and Workshop on Scientific Use of Submarine Cables and Related Technologies","volume":"105 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-04-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126420321","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 14

Marine Cable Hosted Observatory (MACHO) Project in Taiwan 台湾海缆天文台(MACHO)计划

2007 Symposium on Underwater Technology and Workshop on Scientific Use of Submarine Cables and Related Technologies Pub Date : 2007-04-17 DOI: 10.1109/UT.2007.370808

S. Hsu, C-s. Lee, T. Shin, C.‐S. Liu, B. Huang, B. Kuo, C.-H. Lin, D. Tang, H.-Y. Chang, C. Kuo

{"title":"Marine Cable Hosted Observatory (MACHO) Project in Taiwan","authors":"S. Hsu, C-s. Lee, T. Shin, C.‐S. Liu, B. Huang, B. Kuo, C.-H. Lin, D. Tang, H.-Y. Chang, C. Kuo","doi":"10.1109/UT.2007.370808","DOIUrl":"https://doi.org/10.1109/UT.2007.370808","url":null,"abstract":"Taiwan is located in a junction corner between the Philippine sea plate and Eurasian plate. Because of active convergence, numerous earthquakes have taken place in and around Taiwan. On average, there are about two earthquakes greater than magnitude 6 each year and over 70% of earthquakes occurred in the offshore area. Because of the subduction of Philippine Sea Plate beneath the western end of the Ryukyu Arc and northern Taiwan, both the tectonics and seismic activity are intensive. The 2004 Sumatra earthquake has induced giant tsunami attacking coastal countries of South Asia. In a similar geodynamic context, the Sumatra event has aroused the attention of Taiwan government. Specialists from Taiwan earth scientists and ocean engineers have quickly teamed up to discuss the potential and mitigation of natural hazards from the western end of the Ryukyu subduction zone. To construct a submarine cable observatory off eastern Taiwan (MACHO project) was proposed. MACHO means a sea goddess who protects people at sea. The purpose of MACHO project has several folds. Firstly, the extension of seismic stations on land to offshore area can increase the resolution of earthquake relocating. Secondly, the extension of seismic stations may obtain tens of second before the destructing seismic waves arrive on land or tens of minute before the arrival of giant tsunami, which is helpful for earthquake or tsunami warning. Thirdly, the seafloor scientific station can monitor the active volcanoes in the Okinawa Trough, which is directly adjacent to the Ilan plain in northeastern Taiwan. Fourthly, the seafloor observatory can be used to continuously study the Kurosho current, off eastern Taiwan. The MACHO project has been granted for the fiscal year of 2007. The MACHO project is expected to be fulfilled in 2009.","PeriodicalId":345403,"journal":{"name":"2007 Symposium on Underwater Technology and Workshop on Scientific Use of Submarine Cables and Related Technologies","volume":"3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-04-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132237873","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 15

Identification of Hydrodynamic Parameters for a Remotely Operated Vehicle Using Projective Mapping Method 用投影映射法识别遥控车辆的流体动力参数

2007 Symposium on Underwater Technology and Workshop on Scientific Use of Submarine Cables and Related Technologies Pub Date : 2007-04-17 DOI: 10.1109/UT.2007.370768

Hsin-Hung Chen, H. Chang, C. Chou, P. Tseng

{"title":"Identification of Hydrodynamic Parameters for a Remotely Operated Vehicle Using Projective Mapping Method","authors":"Hsin-Hung Chen, H. Chang, C. Chou, P. Tseng","doi":"10.1109/UT.2007.370768","DOIUrl":"https://doi.org/10.1109/UT.2007.370768","url":null,"abstract":"This study proposed a sequential procedure for identifying all hydrodynamic parameters of a remotely operated vehicle (ROV). A simplified nonlinear ROV dynamic model with twelve unknown hydrodynamic parameters in six degrees of freedom was used for simulations. Uncoupled motions such as surge, heave, sway, yaw, and coupling surge and sway were obtained from ROV dynamic model to reduce number of parameters needed to be estimated simultaneously. A vision-based system was utilized to capture time-series images of ROV planar simple motions and an onboard pressure sensor was used to record ROV heave motion. Based on observations of captured time-series images, ROV planar movements were resolved by projective mapping. Then, hydrodynamic parameters were estimated with numerical optimizations by comparing the responses of the ROV and the mathematical model to the same inputs. Sequential identifications were performed, from the simple to the complex, in the order of first surge, next heave, yaw, then sway, and finally coupling surge and sway motions, and the results were satisfactory. As well, the results have been shown that the parameters identified from the coupling surge and sway motion have worse accuracy than those identified from single-degree-of-freedom motions.","PeriodicalId":345403,"journal":{"name":"2007 Symposium on Underwater Technology and Workshop on Scientific Use of Submarine Cables and Related Technologies","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-04-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129252426","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 15

Quantitative Surveys of Fish Assemblage at a High-rise Artificial Fish Reef by Stationary Underwater Cameras 固定式水下相机对高层人工鱼礁鱼类群落的定量调查

2007 Symposium on Underwater Technology and Workshop on Scientific Use of Submarine Cables and Related Technologies Pub Date : 2007-04-17 DOI: 10.1109/UT.2007.370753

H. Takahashi, A. Matsuda, T. Akamatsu, N. Takagi

{"title":"Quantitative Surveys of Fish Assemblage at a High-rise Artificial Fish Reef by Stationary Underwater Cameras","authors":"H. Takahashi, A. Matsuda, T. Akamatsu, N. Takagi","doi":"10.1109/UT.2007.370753","DOIUrl":"https://doi.org/10.1109/UT.2007.370753","url":null,"abstract":"Stationary underwater cameras were deployed to evaluate spatial and temporal distribution of fish assemblage inhabiting a high-rise artificial reef. The camera named FISCHOM has a stereo camera or a monaural camera on board and it can operate periodically by an arbitrary interval. We can acquire the information about fish fauna and fish size distribution and their time series of reef fish assemblages by the assessment using the FISCHOMs. Two surveys were conducted in the early summer and fall of 2005 at a high-rise artificial fish reef in the Sea of Japan. In both surveys, five FISCHOMs were fixed dispersedly on the reef and operated in an hour interval. As a result, we could evaluate the spatial and temporal distribution of the fish assemblage and their seasonal variations around the reef about 20 days. In total, 48 thousands of fish were counted in both surveys. Pearl-spot chromis Chromis notata notata, jack mackerel Trachurus japonicus, and rockfish Sebastes spp. were mainly observed. We confirmed these major species had stable diurnal cycles; they were observed in daytime and rarely observed in midnight The differences of the spatial distributions of the major species were found by comparing the results of each FISCHOMs. The folk lengths of the major species were estimated by stereo measurements.","PeriodicalId":345403,"journal":{"name":"2007 Symposium on Underwater Technology and Workshop on Scientific Use of Submarine Cables and Related Technologies","volume":"127 3","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-04-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133112191","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Underwater Cable Network: Capturing Processes in the Ocean 水下电缆网络:海洋中的捕获过程

2007 Symposium on Underwater Technology and Workshop on Scientific Use of Submarine Cables and Related Technologies Pub Date : 2007-04-17 DOI: 10.1109/UT.2007.370785

K. Suyehiro

引用次数: 2

Neural Oscillator Based Motion Control System for Snake-like Robot 基于神经振荡器的蛇形机器人运动控制系统

2007 Symposium on Underwater Technology and Workshop on Scientific Use of Submarine Cables and Related Technologies Pub Date : 2007-04-17 DOI: 10.1109/UT.2007.370749

T. Matsuo, K. Ishii

引用次数: 5

Analysis of Short Term Temporal Fluctuations in Noise Power Spectrum of Shallow Water Ambient Noise 浅水环境噪声功率谱短期波动分析

2007 Symposium on Underwater Technology and Workshop on Scientific Use of Submarine Cables and Related Technologies Pub Date : 2007-04-17 DOI: 10.1109/UT.2007.370950

S. Ramji, S. Ramakrishanan, G. Latha

引用次数: 5