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2018 IEEE 8th International Conference on Underwater System Technology: Theory and Applications (USYS)最新文献

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Numerical study on vibration characteristics of the underwater partially fluid-filled cylindrical shell 水下部分充液圆柱壳振动特性的数值研究
2018 IEEE 8th International Conference on Underwater System Technology: Theory and Applications (USYS) Pub Date : 2018-12-01 DOI: 10.1109/USYS.2018.8778928
Jing Li, Tianyun Li, Xiang Zhu, Yueyang Han
{"title":"Numerical study on vibration characteristics of the underwater partially fluid-filled cylindrical shell","authors":"Jing Li, Tianyun Li, Xiang Zhu, Yueyang Han","doi":"10.1109/USYS.2018.8778928","DOIUrl":"https://doi.org/10.1109/USYS.2018.8778928","url":null,"abstract":"The structural finite element coupled with acoustic finite element method is employed to study the vibration characteristics of an underwater partially water-filled cylindrical shell. Taking the underwater cylindrical shell without internal fluid for example, the natural frequency and vibration response of the shell are calculated with the numerical method. The analytical results of the model are also presented to illustrate the accuracy of the numerical method. Then by changing the depth of the internal fluid, the effects of internal fluid on the vibration characteristics of the underwater shells are analyzed. And the effects of the direction and location of the applied loads on the sound radiation as well as the forced vibration are discussed. The results show that the internal liquid has influences on the vibration characteristics and the sound radiation of the system, which leads to complicated mode shapes for the partial interaction between the internal liquid with the shell. When the depth of the internal liquid increases, the natural frequency of the coupled structure decreases, and the vibration mode becomes irregular. For the forced vibration, the response is maximum when radial excitation is applied at a location where the shell isn’t coupled to the internal fluid. The peak of the curve shifts to the lower frequency as the depth of the internal liquid increases.","PeriodicalId":299885,"journal":{"name":"2018 IEEE 8th International Conference on Underwater System Technology: Theory and Applications (USYS)","volume":"19 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115259535","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
Experiment and Numerical Simulation on Collision of Box Girder Hull Model in Towing Tank 拖曳舱箱梁船体模型碰撞试验与数值模拟
2018 IEEE 8th International Conference on Underwater System Technology: Theory and Applications (USYS) Pub Date : 2018-12-01 DOI: 10.1109/USYS.2018.8778945
Lian-Xia Li, Ping Liu, J. Du
{"title":"Experiment and Numerical Simulation on Collision of Box Girder Hull Model in Towing Tank","authors":"Lian-Xia Li, Ping Liu, J. Du","doi":"10.1109/USYS.2018.8778945","DOIUrl":"https://doi.org/10.1109/USYS.2018.8778945","url":null,"abstract":"Ship collision or stranding will not only cause great economic loss, but also cause serious damage to marine environment and ecological balance. In this paper, an investigation on external mechanism of cargo ship under collision scenariothrough model testing methods are conducted in towing tank. The effects of striking velocity and striking angle on the structural damage, energy dissipation and collisionforce are analyzed. In addition, explicit LS-DYNA finite element solver is also employed to simulate the collision scenario, and corresponding comparisons are made. It is shown that the colliding force will decrease with the striking angle decreasing, while the colliding force and indentation depth both increase with the striking velocity increasing. The experimental data can provide support for carrying out the simulation of the ship collision in accuracy and reliability.","PeriodicalId":299885,"journal":{"name":"2018 IEEE 8th International Conference on Underwater System Technology: Theory and Applications (USYS)","volume":"19 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114264697","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: 0
Underwater Image Enhancement Algorithm Adapted to Different Turbidities Ranges 适应不同浊度范围的水下图像增强算法
2018 IEEE 8th International Conference on Underwater System Technology: Theory and Applications (USYS) Pub Date : 2018-12-01 DOI: 10.1109/USYS.2018.8778882
Z. Deng, Daxiong Ji, Lizhong Gu, M. Sun, Xin Yao
{"title":"Underwater Image Enhancement Algorithm Adapted to Different Turbidities Ranges","authors":"Z. Deng, Daxiong Ji, Lizhong Gu, M. Sun, Xin Yao","doi":"10.1109/USYS.2018.8778882","DOIUrl":"https://doi.org/10.1109/USYS.2018.8778882","url":null,"abstract":"This paper proposed an image enhancement method that can adapt to changes in turbidity within a certain range. Establishing illumination intensity attenuation model based on light source carried by robot, we combine the absorption and scattering attenuation factors of the underwater medium with the turbidity of the water to obtain the defuzzified image. This method not only takes into account various complex attenuation media underwater, but also considers the changes in water quality in dynamic scenes. The proposed algorithm can be more adaptive to the motion of underwater robots. It can be seen from the comparative test analysis that the approach has strong robustness in a certain turbidity range.","PeriodicalId":299885,"journal":{"name":"2018 IEEE 8th International Conference on Underwater System Technology: Theory and Applications (USYS)","volume":"3 4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116824772","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: 0
Predictor-based Bounded Fuzzy Control for Target Enclosing of an Autonomous Surface Vehicle 基于预测器的自主地面车辆目标封闭有界模糊控制
2018 IEEE 8th International Conference on Underwater System Technology: Theory and Applications (USYS) Pub Date : 2018-12-01 DOI: 10.1109/USYS.2018.8779213
Yue Jiang, Zhouhua Peng, Dan Wang, Lu Liu, Nan Gu
{"title":"Predictor-based Bounded Fuzzy Control for Target Enclosing of an Autonomous Surface Vehicle","authors":"Yue Jiang, Zhouhua Peng, Dan Wang, Lu Liu, Nan Gu","doi":"10.1109/USYS.2018.8779213","DOIUrl":"https://doi.org/10.1109/USYS.2018.8779213","url":null,"abstract":"A target enclosing scheme is investigated for autonomous surface vehicles. The target moves with a time-varying and unknown velocity, and only the relative range and angle is available. A yaw rate control law is proposed at first, where an extended state observer is designed to identify relative dynamics. Next, using the torque and position date from the follower, a fuzzy system is utilized based on prediction errors to estimate the dynamics caused by parametric uncertainty, unmodeled hydrodynamics and external disturbances. Finally, using the reconstructed unknown dynamics, a predictor-based bounded kinetic control law is proposed. Though Lyapunov theory, the target enclosing system is analyzed, and the result of input-to-state stability is proved. Simulation study for two vehicles shows the effectiveness of this target enclosing controller.","PeriodicalId":299885,"journal":{"name":"2018 IEEE 8th International Conference on Underwater System Technology: Theory and Applications (USYS)","volume":"40 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121734527","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: 0
Simulation research and optimization design on towed system of manned submersible 载人潜水器拖曳系统仿真研究与优化设计
2018 IEEE 8th International Conference on Underwater System Technology: Theory and Applications (USYS) Pub Date : 2018-12-01 DOI: 10.1109/USYS.2018.8779225
Jiao Huifeng, F. Wei, Zhang Lindan, Zhao Chuncheng, Zheng Zhiheng, Jiao Huifeng
{"title":"Simulation research and optimization design on towed system of manned submersible","authors":"Jiao Huifeng, F. Wei, Zhang Lindan, Zhao Chuncheng, Zheng Zhiheng, Jiao Huifeng","doi":"10.1109/USYS.2018.8779225","DOIUrl":"https://doi.org/10.1109/USYS.2018.8779225","url":null,"abstract":"This article presents a digital virtual design for the towed system embarked by manned submersible, which builds an overall design of the compositions, the loads and the operation modes for the system. It elaborates an optimized design for towed vehicle, towed cable and winch. This towed vehicle design takes the needs of hydraulic resistance, posture and sail stability into consideration, and uses CFD simulation to calculate the characteristics of its fluid resistance. It also draws a detailed design for winch reel, cable metering device, frame, transmission, rope-pressed device, revolution-meter and inlet/outlet channel. Furthermore, it simulates the motion characteristic of the system, and analyses the motion modes of different manned submersibles related to current velocity and varied cable lengths, which also provides the references for the position of weight carries related to different detection speed.","PeriodicalId":299885,"journal":{"name":"2018 IEEE 8th International Conference on Underwater System Technology: Theory and Applications (USYS)","volume":"6 2","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131922473","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: 3
USYS 2018 List of Papers and Authors USYS 2018论文和作者名单
2018 IEEE 8th International Conference on Underwater System Technology: Theory and Applications (USYS) Pub Date : 2018-12-01 DOI: 10.1109/usys.2018.8778923
{"title":"USYS 2018 List of Papers and Authors","authors":"","doi":"10.1109/usys.2018.8778923","DOIUrl":"https://doi.org/10.1109/usys.2018.8778923","url":null,"abstract":"","PeriodicalId":299885,"journal":{"name":"2018 IEEE 8th International Conference on Underwater System Technology: Theory and Applications (USYS)","volume":"68 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133710488","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: 0
USYS 2018 Committees
2018 IEEE 8th International Conference on Underwater System Technology: Theory and Applications (USYS) Pub Date : 2018-12-01 DOI: 10.1109/usys.2018.8779070
{"title":"USYS 2018 Committees","authors":"","doi":"10.1109/usys.2018.8779070","DOIUrl":"https://doi.org/10.1109/usys.2018.8779070","url":null,"abstract":"","PeriodicalId":299885,"journal":{"name":"2018 IEEE 8th International Conference on Underwater System Technology: Theory and Applications (USYS)","volume":"20 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127844504","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: 0
[USYS 2018 Back cover] [USYS 2018封底]
2018 IEEE 8th International Conference on Underwater System Technology: Theory and Applications (USYS) Pub Date : 2018-12-01 DOI: 10.1109/usys.2018.8779146
{"title":"[USYS 2018 Back cover]","authors":"","doi":"10.1109/usys.2018.8779146","DOIUrl":"https://doi.org/10.1109/usys.2018.8779146","url":null,"abstract":"","PeriodicalId":299885,"journal":{"name":"2018 IEEE 8th International Conference on Underwater System Technology: Theory and Applications (USYS)","volume":"17 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114938107","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: 0
Hydrodynamic Prediction of Multi-Legged Positions and Gestures During C-SV Cruising C-SV巡航中多足位置和姿态的流体动力学预测
2018 IEEE 8th International Conference on Underwater System Technology: Theory and Applications (USYS) Pub Date : 2018-12-01 DOI: 10.1109/USYS.2018.8778909
Kang Zhang, Lei Wang, Wei Wei, Hong Chen
{"title":"Hydrodynamic Prediction of Multi-Legged Positions and Gestures During C-SV Cruising","authors":"Kang Zhang, Lei Wang, Wei Wei, Hong Chen","doi":"10.1109/USYS.2018.8778909","DOIUrl":"https://doi.org/10.1109/USYS.2018.8778909","url":null,"abstract":"This paper studies the hydrodynamic coefficients of multi-legged positions and gestures during crawling-swimming vehicle(C-SV) cruising, which includes resistance, oblique and pure pitch movement. Hybrid mesh is adopted during computation, because it can avoid mesh distortion caused by dynamic mesh and improve computation efficiency. The results show that resistance of multi-legs accounts for a large component of total resistance. The trends of vertical force and pitching moment of C-SVs are related to multi-legged positions and gestures. Computational results of pure pitching movement have relative errors, which needs further research and experiment validation.","PeriodicalId":299885,"journal":{"name":"2018 IEEE 8th International Conference on Underwater System Technology: Theory and Applications (USYS)","volume":"70 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122359245","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: 0
Modeling of the Tail Slap for A Supercavitating Projectile 超空泡弹丸尾翼拍打的建模
2018 IEEE 8th International Conference on Underwater System Technology: Theory and Applications (USYS) Pub Date : 2018-12-01 DOI: 10.1109/USYS.2018.8779216
Xuefeng Zhao, Xujian Lyu, Da Li
{"title":"Modeling of the Tail Slap for A Supercavitating Projectile","authors":"Xuefeng Zhao, Xujian Lyu, Da Li","doi":"10.1109/USYS.2018.8779216","DOIUrl":"https://doi.org/10.1109/USYS.2018.8779216","url":null,"abstract":"This paper presents a model for forward motion and tail slap dynamics by mathematic deduction. The MATLAB software is applied to model the above motion and the characteristics for a single slap in the water layer are analyzed, as well as several slaps in the cavitation. The duration time of single slap increases as the projectile speed decrease into a certain range and this may lead to collapse of the supercavitation and instability of the projectile moving forward. It turns out that the number of the tail slap and the reflection angle increase with the increasing of the projectile angular speed. What’s more, the differences between parameters of different slap points become smaller as the tail slap goes on under supercavitation condition.","PeriodicalId":299885,"journal":{"name":"2018 IEEE 8th International Conference on Underwater System Technology: Theory and Applications (USYS)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115950198","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
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