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Track Evaluation from Train Responses by Data Assimilation and Machine Learning

Research Project

Project/Area Number 19K04570
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 22020:Structure engineering and earthquake engineering-related
Research InstitutionThe University of Tokyo

Principal Investigator

Su Di  東京大学, 大学院工学系研究科(工学部), 特任准教授 (40535796)

Project Period (FY) 2019-04-01 – 2022-03-31
Project Status Completed (Fiscal Year 2021)
Budget Amount *help
¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000)
Fiscal Year 2021: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2020: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2019: ¥1,950,000 (Direct Cost: ¥1,500,000、Indirect Cost: ¥450,000)
Keywords軌道評価 / データ同化 / 機械学習 / 携帯情報端末 / 車両応答 / 営業車両応答 / 維持管理工学 / デ ー タ 同化
Outline of Research at the Start

営業車両の車体にとりつける振動計測システムから軌道状態を把握することが期待されている.本研究では,近年急速に普及した安価な携帯情報端末により観測した,営業車両の車体及び台車の振動応答から軌道状態を推定し,簡便かつ高頻度な常時モニタリングシステムの構築を目指す.研究の方法としては,軌道変状が長短波長成分を分類され,データ同化手法と機械学習手法を組み合わせ,数値解析モデルで検証する上,実線路営業車両へ応用検証を行う.本システムは全国中小鉄道での利用を想定しており,僅か数万円の経済負担で安全性を向上させ,事故の発生を未然に防ぐと共に,鉄道インフラの維持管理の合理化を図るものである.

Outline of Final Research Achievements

Early detection of rail abnormalities is important to prevent accidents caused by track irregularity. However, track inspections, usually conducted once a year, are infrequent and do not adequately monitor the progress of track deterioration. This study aims to construct a simple and high-frequency monitoring system by estimating track conditions based on vibration responses of car bodies of commercial vehicles observed by inexpensive mobile devices, which have rapidly become popular in recent years. The research method is to classify track irregularity into long- and short-wavelength components, combine data assimilation and machine learning methods, verify the results using numerical analysis models, and apply the results to actual trains. The evaluation method of track conditions is constructed by numerical analysis and actual vehicle measurement, and the practicality and accuracy of the method are clarified.

Academic Significance and Societal Importance of the Research Achievements

軌道の変状特性によって応答への影響が異なる.本研究は対象とする軌道状態を表現するために十分に詳細な,かつ,逆解析に耐える車両モデルを提案する.さらに,長波長変状成分をデータ同化から直接逆推定を適用するともに,推定困難の短波長成分は機械学習より特徴検出を試みた.
本システムでは,営業車両と携帯情報端末を利用するため,特殊な車両と計測機器を必要としないことから,実装は容易である.また,通常営業中に頻繁な計測,データ収集が可能であるため,本研究は地方中小鉄道事業者に低廉かつ簡便なモニタリング手法を提供し,資産価値の維持と向上に資する重要な基礎技術と位置付けられる.

Report

(4 results)
  • 2021 Annual Research Report   Final Research Report ( PDF )
  • 2020 Research-status Report
  • 2019 Research-status Report
  • Research Products

    (9 results)

All 2022 2021 2020 2019 Other

All Int'l Joint Research (2 results) Journal Article (2 results) (of which Peer Reviewed: 2 results,  Open Access: 1 results) Presentation (5 results) (of which Int'l Joint Research: 1 results)

  • [Int'l Joint Research] RDSO/Ministry of Railways(インド)

    • Related Report
      2021 Annual Research Report
  • [Int'l Joint Research] RDSO/Ministry of Railways(インド)

    • Related Report
      2020 Research-status Report
  • [Journal Article] Response based track profile estimation using observable train models with numerical and experimental validations2021

    • Author(s)
      Jothi Saravanan Thiyagarajan, Di Su, Hirofumi Tanaka, Boyu Zhao and Tomonori Nagayama
    • Journal Title

      Smart Structures and Systems

      Volume: 27 Pages: 267-284

    • Related Report
      2020 Research-status Report
    • Peer Reviewed
  • [Journal Article] Numerical Investigation of Unsupported Sleeper Detection Method Based on LSTM and Monte Carlo Dropout2020

    • Author(s)
      久野元、蘇迪、長山智則
    • Journal Title

      Intelligence, Informatics and Infrastructure

      Volume: 1 Issue: J1 Pages: 536-544

    • DOI

      10.11532/jsceiii.1.J1_536

    • NAID

      130007940714

    • ISSN
      2435-9262
    • Year and Date
      2020-11-11
    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Open Access
  • [Presentation] 継ぎ目を考慮した浮きまくらぎ検知手法の数値的検討2022

    • Author(s)
      中村俊敬,蘇迪,長山智則
    • Organizer
      第77回土木学会年次学術講演会
    • Related Report
      2021 Annual Research Report
  • [Presentation] Experimental and numerical evaluation of longitudinal vehicular forces on bridges of Indian railways2021

    • Author(s)
      Swapnil Chaurasia, Di Su
    • Organizer
      9th International Conference on Experimental Vibration for Civil Engineering Structures (EVACES2021)
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Experimental and numerical evaluation of longitudinal forces on bridges of Indian railways2021

    • Author(s)
      Swapnil Chaurasia, Di Su
    • Organizer
      第76回土木学会年次学術講演会
    • Related Report
      2021 Annual Research Report
  • [Presentation] 振動モニタリングによるレール波状摩耗の進展把握システムの開 発2020

    • Author(s)
      田中博文、梶原和博、神野響一、川西直、蘇迪、長山智則
    • Organizer
      令和2年度土木学会全国大会第75回年次学術講演会
    • Related Report
      2020 Research-status Report
  • [Presentation] 車体振動を用いた浮きまくらぎ検知手法の数値的検討2019

    • Author(s)
      久野元,蘇迪,長山智則
    • Organizer
      第74回土木学会年次学術講演会
    • Related Report
      2019 Research-status Report

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Published: 2019-04-18   Modified: 2023-01-30  

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