{"title":"Mathematic Modeling and Control of Underwater Cable-Driven Parallel Robot","authors":"Katutoshi Kodama, Akihiro Morinaga, Ikuo Yamamoto","doi":"10.2534/jjasnaoe.36.53","DOIUrl":"https://doi.org/10.2534/jjasnaoe.36.53","url":null,"abstract":"","PeriodicalId":192323,"journal":{"name":"Journal of the Japan Society of Naval Architects and Ocean Engineers","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129897500","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}
Kazuhisa Otsubo, Mitsushi Watanabe, K. Ishida, M. Araki, Kenta Hasegawa, M. Saito, Hiroshi Sato, K. Yukawa, R. Iwashita, S. Kawano
1) Taniguchi, K.: The Hydrogen Gas Cutting System, Komatsu Technical Report, Vol. 50 No. 154, 2004. 2) Suitsu, K. and Yasuda, T.: Some Investigations Regarding Oxygen Cutting (Report 5) –Effect of Preheat Variation on the Cutting Efficiency-, Journal of the Japan Welding Society, Vol. 37. No. 10 pp. 1108-1114, 1961. 3) Nakanishi, M.: Study of Preheating Flame on Oxygen Cutting (Report 1) -Examination of the Heating Effect on the Cut Material-, Journal of the Japan Welding Society, Vol. 37, No. 11, pp. 1260-1287, 1968. 4) Sato, T., Yamamoto, Y., Kato, T., Takeda, T., Nagahori, N., Kamikihara, H.: Influence of Gas
{"title":"On availability analysis for pilot test of excavating and ore lifting conducted for seafloor polymetallic sulphides","authors":"Kazuhisa Otsubo, Mitsushi Watanabe, K. Ishida, M. Araki, Kenta Hasegawa, M. Saito, Hiroshi Sato, K. Yukawa, R. Iwashita, S. Kawano","doi":"10.2534/jjasnaoe.29.147","DOIUrl":"https://doi.org/10.2534/jjasnaoe.29.147","url":null,"abstract":"1) Taniguchi, K.: The Hydrogen Gas Cutting System, Komatsu Technical Report, Vol. 50 No. 154, 2004. 2) Suitsu, K. and Yasuda, T.: Some Investigations Regarding Oxygen Cutting (Report 5) –Effect of Preheat Variation on the Cutting Efficiency-, Journal of the Japan Welding Society, Vol. 37. No. 10 pp. 1108-1114, 1961. 3) Nakanishi, M.: Study of Preheating Flame on Oxygen Cutting (Report 1) -Examination of the Heating Effect on the Cut Material-, Journal of the Japan Welding Society, Vol. 37, No. 11, pp. 1260-1287, 1968. 4) Sato, T., Yamamoto, Y., Kato, T., Takeda, T., Nagahori, N., Kamikihara, H.: Influence of Gas","PeriodicalId":192323,"journal":{"name":"Journal of the Japan Society of Naval Architects and Ocean Engineers","volume":"14 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133014444","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}
{"title":"Estimation of Wave Loads based on Two-dimensional Wave Spectrum by Hindcast.","authors":"M. Oka, Chong Ma, Xi Chen","doi":"10.2534/jjasnaoe.36.125","DOIUrl":"https://doi.org/10.2534/jjasnaoe.36.125","url":null,"abstract":"","PeriodicalId":192323,"journal":{"name":"Journal of the Japan Society of Naval Architects and Ocean Engineers","volume":"36 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125009389","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}
H. Narimatsu, T. Uemura, Masakazu Kuwada, K. Gotoh
{"title":"Studies on applying hot-rolled coil to hull superstructure","authors":"H. Narimatsu, T. Uemura, Masakazu Kuwada, K. Gotoh","doi":"10.2534/jjasnaoe.32.247","DOIUrl":"https://doi.org/10.2534/jjasnaoe.32.247","url":null,"abstract":"","PeriodicalId":192323,"journal":{"name":"Journal of the Japan Society of Naval Architects and Ocean Engineers","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128289557","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}
{"title":"Evaluation of the Kinetic Performance of a High-Speed Planing Vehicle","authors":"K. Yukawa, Kenta Hasegawa, K. Ishida, Shota Saito","doi":"10.2534/jjasnaoe.36.15","DOIUrl":"https://doi.org/10.2534/jjasnaoe.36.15","url":null,"abstract":"","PeriodicalId":192323,"journal":{"name":"Journal of the Japan Society of Naval Architects and Ocean Engineers","volume":"16 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129317921","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}
It is important to understand and predict fish behavior to assess the impacts of coastal development on ecosystem or to conduct appropriate fishery management. In order to collect information for understanding fish behavior, we measured the environmental factors and the distribution of fish simultaneously by using fishing boats. The memory-type sensors were attached to the fishing gear of the small trawling boats in Ise Bay, through which the water temperature, dissolved oxygen, and depth were measured as well as position information by GPS. At the same time, fish catch of each haul by trawling were recorded to grasp the fish distribution. The obtained data provides much more information for temporal and spatial distribution of water qualities than conventional monitoring. We tried to predict resource distributions by artificial neural network using the obtained data. It is found that the environmental factor affecting the behavior of conger eel varies with respect to the months. The developed neural network could predict the horizontal distribution of the conger eel fairly well.
{"title":"Estimation of fish distribution by means of neural network using monitoring data by fishing boats","authors":"Kimitoshi Iwaba, S. Tabeta, T. Hamada, K. Mizuno","doi":"10.2534/jjasnaoe.29.117","DOIUrl":"https://doi.org/10.2534/jjasnaoe.29.117","url":null,"abstract":"It is important to understand and predict fish behavior to assess the impacts of coastal development on ecosystem or to conduct appropriate fishery management. In order to collect information for understanding fish behavior, we measured the environmental factors and the distribution of fish simultaneously by using fishing boats. The memory-type sensors were attached to the fishing gear of the small trawling boats in Ise Bay, through which the water temperature, dissolved oxygen, and depth were measured as well as position information by GPS. At the same time, fish catch of each haul by trawling were recorded to grasp the fish distribution. The obtained data provides much more information for temporal and spatial distribution of water qualities than conventional monitoring. We tried to predict resource distributions by artificial neural network using the obtained data. It is found that the environmental factor affecting the behavior of conger eel varies with respect to the months. The developed neural network could predict the horizontal distribution of the conger eel fairly well.","PeriodicalId":192323,"journal":{"name":"Journal of the Japan Society of Naval Architects and Ocean Engineers","volume":"9 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128574241","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}
Tomoki Taniguchi, T. Fujiwara, Jun Umeda, T. Nimura, T. Katayama
Real-time implementation of a nonlinear model predictive control (NMPC) for a point absorber type wave energy converter (PAWEC) with a tubular air cored permanent magnet generator is experimentally validated through tank model tests. The control inputs of the NMPC were updated by the differential equation to trace the solution of an associated two-point boundary-value problem. Two conventional control strategies, the resistive load control and the approximate complex-conjugate control with considering the copper loss (ACL), and the NMPC were implemented to the PAWEC model. The floater heave motion, control force of the generator, and power generation characteristics were compared in these control strategies. The power generation performance of the NNPC was the same level of that of the ACL in regular and irregular waves. The sensitivities to the linear viscous damping estimation error and to the wave excitation force estimation error in the NMPC were experimentally evaluated by the tank model tests.
{"title":"Validation of Real-Time Nonlinear Model Predictive Control on Point Absorber Type Wave Energy Converter by Tank Test","authors":"Tomoki Taniguchi, T. Fujiwara, Jun Umeda, T. Nimura, T. Katayama","doi":"10.2534/jjasnaoe.33.247","DOIUrl":"https://doi.org/10.2534/jjasnaoe.33.247","url":null,"abstract":"Real-time implementation of a nonlinear model predictive control (NMPC) for a point absorber type wave energy converter (PAWEC) with a tubular air cored permanent magnet generator is experimentally validated through tank model tests. The control inputs of the NMPC were updated by the differential equation to trace the solution of an associated two-point boundary-value problem. Two conventional control strategies, the resistive load control and the approximate complex-conjugate control with considering the copper loss (ACL), and the NMPC were implemented to the PAWEC model. The floater heave motion, control force of the generator, and power generation characteristics were compared in these control strategies. The power generation performance of the NNPC was the same level of that of the ACL in regular and irregular waves. The sensitivities to the linear viscous damping estimation error and to the wave excitation force estimation error in the NMPC were experimentally evaluated by the tank model tests.","PeriodicalId":192323,"journal":{"name":"Journal of the Japan Society of Naval Architects and Ocean Engineers","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122636206","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}
{"title":"Fuel Saving Evaluation of a Rotor Ship in Actual Seas","authors":"N. Sogihara, K. Kume","doi":"10.2534/jjasnaoe.35.29","DOIUrl":"https://doi.org/10.2534/jjasnaoe.35.29","url":null,"abstract":"","PeriodicalId":192323,"journal":{"name":"Journal of the Japan Society of Naval Architects and Ocean Engineers","volume":"35 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123544904","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}
Yukihide Yoshihara, N. Osawa, H. Murakawa, Dai Peiyuan
{"title":"Study on the Estimation Method for Welding Fatigue Mean Stress Effect Independently from Failure Mode and Joint Type","authors":"Yukihide Yoshihara, N. Osawa, H. Murakawa, Dai Peiyuan","doi":"10.2534/jjasnaoe.36.69","DOIUrl":"https://doi.org/10.2534/jjasnaoe.36.69","url":null,"abstract":"","PeriodicalId":192323,"journal":{"name":"Journal of the Japan Society of Naval Architects and Ocean Engineers","volume":"31 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122530758","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}
{"title":"Extraction of Dominant Parameters and Proposal of Simplified Formula for Ship Motion in Waves","authors":"S. Matsui, Kyohei Shinomoto, Kei Sugimoto","doi":"10.2534/jjasnaoe.35.43","DOIUrl":"https://doi.org/10.2534/jjasnaoe.35.43","url":null,"abstract":"","PeriodicalId":192323,"journal":{"name":"Journal of the Japan Society of Naval Architects and Ocean Engineers","volume":"16 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114970885","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}
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