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Optimal Designing of Tidal/Ocean Power Generator by Machine Learning Architecture

Research Project

Project/Area Number 21K14081
Research Category

Grant-in-Aid for Early-Career Scientists

Allocation TypeMulti-year Fund
Review Section Basic Section 19010:Fluid engineering-related
Research InstitutionHakodate National College of Technology

Principal Investigator

Fujiwara Ryo  函館工業高等専門学校, 生産システム工学科, 准教授 (70791375)

Project Period (FY) 2021-04-01 – 2024-03-31
Project Status Completed (Fiscal Year 2023)
Budget Amount *help
¥4,680,000 (Direct Cost: ¥3,600,000、Indirect Cost: ¥1,080,000)
Fiscal Year 2023: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
Fiscal Year 2022: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2021: ¥2,340,000 (Direct Cost: ¥1,800,000、Indirect Cost: ¥540,000)
Keywords深層学習 / 変分オートエンコーダ / 海洋発電機 / 流体場 / 海洋発電 / 機械学習 / 最適設計
Outline of Research at the Start

潮海流発電において効率的にエネルギを回収するため,人間社会の利益となる物理量を最大化し,不利益となる物理量を最小化する性能を実現する設計(最適設計)を機械学習により行う.最適設計を行うため,流体・機械・電気要素等の幾多もの設計値間の多変量解析を行う必要がある.従来の多変量解析手法では,計算時間が膨大となる,発電機の形状や流況により数理モデルが恣意的になる,他海域におけるエネルギ回収へ応用可能な知見が得られるとは限らない等の問題点がある.本研究課題ではこれらの問題点を解決するため,機械学習により流速場等の実験データを学習させ海洋発電機の最適設計値を推定する.

Outline of Final Research Achievements

The objective of this research project is to estimate the optimal design values of a generator that utilizes the tidal currents and ocean currents of the Tsugaru Straits by learning big data with an architecture that combines machine learning methods such as deep learning in order to speed up multivariate analysis in generator design and to obtain general-purpose results. Using a deep neural network and a variational autoencoder, we were able to predict the current velocity field from the design values and boundary conditions and establish the basis for an architecture to predict the performance of marine generators. This architecture can be applied to other fluid machinery design problems.

Academic Significance and Societal Importance of the Research Achievements

本研究課題で開発したアーキテクチャを応用すれば他の流体機械の設計問題にも応用可能である.機械学習アーキテクチャによる解法は同様の問題にも適用できることが他の問題解決手法と大きく異なる特徴である.

Report

(4 results)
  • 2023 Annual Research Report   Final Research Report ( PDF )
  • 2022 Research-status Report
  • 2021 Research-status Report
  • Research Products

    (8 results)

All 2024 2022 2021

All Journal Article (1 results) (of which Peer Reviewed: 1 results,  Open Access: 1 results) Presentation (6 results) (of which Int'l Joint Research: 1 results) Book (1 results)

  • [Journal Article] Forecasting design values of tidal/ocean power generator in the strait with unidirectional flow by deep learning2022

    • Author(s)
      Fujiwara Ryo、Fukuhara Ryoma、Ebiko Tsubasa、Miyatake Makoto
    • Journal Title

      Intelligent Systems with Applications

      Volume: 14 Pages: 200067-200067

    • DOI

      10.1016/j.iswa.2022.200067

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Open Access
  • [Presentation] Generation of Fluid Field around Tidal/Ocean Power Generator with Unidirectional Flow Exploiting Variable Auto Encoder2024

    • Author(s)
      Ryo Fujiwara, Hiroki Nakagawa, Tsubasa Ebiko, Makoto Miyatake
    • Organizer
      2023 8th International Conference on Green Energy Technologies
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 変分オートエンコーダによる潮海流発電機まわりの二次元的および三次元的な流速場の生成2024

    • Author(s)
      中川 浩貴, 菅野 秀斗, 蛯子 翼, 宮武 誠, 藤原 亮
    • Organizer
      精密工学会北海道支部大会
    • Related Report
      2023 Annual Research Report
  • [Presentation] 潮海流発電装置まわりの三次元的な流速場を用いた変分オートエンコーダによる流速場の生成2024

    • Author(s)
      中川 浩貴, 菅野 秀人, 蛯子 翼, 宮武 誠, 藤原 亮
    • Organizer
      精密工学会大会学術講演会
    • Related Report
      2023 Annual Research Report
  • [Presentation] Attempt to Detect Feature Regions of Current Velocity Field around Tidal Ocean Current Generator Using Activation Map of Convolutional Neural Network and Object Detection Model2022

    • Author(s)
      B. Enkhmanlai, R. Fujiwara
    • Organizer
      Chitose International Forum on Science & Technology 2022
    • Related Report
      2022 Research-status Report
  • [Presentation] 潮海流発電機まわりの流速場を分析する畳み込み層の活性化マップの解析2022

    • Author(s)
      ブレントゥムル エンフマンライ, 藤原 亮
    • Organizer
      精密工学会北海道支部大会
    • Related Report
      2022 Research-status Report
  • [Presentation] AIと実機モデルのシナジーによる海洋発電機の最適設計~津軽海峡からエネルギーを取り出す~2021

    • Author(s)
      藤原 亮
    • Organizer
      超異分野学会 北海道フォーラム2021
    • Related Report
      2021 Research-status Report
  • [Book] Trends and Technological Challenges in Green Energy2024

    • Author(s)
      Zhijun Peng
    • Total Pages
      142
    • Publisher
      Springer Cham
    • ISBN
      9783031555787
    • Related Report
      2023 Annual Research Report

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Published: 2021-04-28   Modified: 2025-01-30  

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