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Development of physical workload evaluation system for repetitive task using muscle fatigue model considering movement variability

Research Project

Project/Area Number 19K04922
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 25020:Safety engineering-related
Research InstitutionTokyo Metropolitan University

Principal Investigator

Seo Akihiko  東京都立大学, システムデザイン研究科, 教授 (80206606)

Project Period (FY) 2019-04-01 – 2023-03-31
Project Status Completed (Fiscal Year 2022)
Budget Amount *help
¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000)
Fiscal Year 2022: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
Fiscal Year 2021: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2020: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2019: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Keywords反復作業 / 筋疲労モデル / 連続作業時間 / 人間工学 / 動作変動
Outline of Research at the Start

作業の快適性向上や製品の操作性向上には、作業時・操作時の身体的な負担を正確に把握し改善する必要がある。そのためには、作業が反復して行われることを踏まえる必要がある。しかし現状の反復作業評価は、ごく限られた種類の作業に適用できる方法しか提案されていない。そこで本研究は、筋の疲労と回復のモデルに動作が変動する影響を組み入れた新たな反復作業負担推定法を開発する。さらに、その結果を可視化して作業設計に利用できるシステムの構築を行う。

Outline of Final Research Achievements

In this research, a measurement device was developed to analyze the factors that cause variability in human manipulation due to repetitive tasks. Then, from the data obtained by using the device, the factors of movement variability and their relationship were analyzed. As a result, we were able to clarify the characteristics of exerted force and changes in posture due to movement. Furthermore, by expanding functions of a digital human model, a system was developed that can examine the relationship between the causes of movement variability and work endurance time. Through the simulation using the system, the effects of working condition factors on working time were examined. In addition, the validity of the simulation was confirmed by actually measuring the data of the variation in operation required for the simulation.

Academic Significance and Societal Importance of the Research Achievements

本研究では、作業者の移動によって生じる手位置の変動を考慮することで、連続作業時間の妥当な増減が得られることを明らかにできた。立ち位置の変動は、設計段階での作業限界シミュレーションに利用しやすく、様々な作業に利用できる可能性が高く、社会的な意義は高いと考えられる。

Report

(5 results)
  • 2022 Annual Research Report   Final Research Report ( PDF )
  • 2021 Research-status Report
  • 2020 Research-status Report
  • 2019 Research-status Report
  • Research Products

    (8 results)

All 2022 2021 2020

All Journal Article (1 results) (of which Peer Reviewed: 1 results,  Open Access: 1 results) Presentation (7 results) (of which Int'l Joint Research: 1 results)

  • [Journal Article] Evaluation of time-varying working posture based on interjoint coordination features extracted from sparse structure learning2021

    • Author(s)
      HIRANAI Kazuki、SEO Akihiko
    • Journal Title

      Mechanical Engineering Journal

      Volume: 8 Issue: 1 Pages: 20-00500-20-00500

    • DOI

      10.1299/mej.20-00500

    • NAID

      130007986836

    • ISSN
      2187-9745
    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Open Access
  • [Presentation] 荷物取り扱い作業における荷物の質量と位置が手位置の変動に与える影響2022

    • Author(s)
      瀬尾明彦
    • Organizer
      日本人間工学会関東支部第52回大会
    • Related Report
      2022 Annual Research Report
  • [Presentation] 保持時間と作業位置の変動が反復持ち上げ作業の連続作業時間に与える影響2022

    • Author(s)
      瀬尾明彦, 平内和樹,菅間敦
    • Organizer
      日本人間工学会第63回大会
    • Related Report
      2021 Research-status Report
  • [Presentation] Evaluation of Force Exertion Strategies During Repetitive Lifting/Lowering Tasks Based on Time-Frequency Analysis2021

    • Author(s)
      Kazuki Hiranai, Miho Yaji1, Akihiko Seo
    • Organizer
      21th Trienial Congress of the International Ergonomics Association
    • Related Report
      2020 Research-status Report
  • [Presentation] 経路探索法を利用した荷物取り扱い動作の経路とばらつき2021

    • Author(s)
      瀬尾明彦, 平内和樹
    • Organizer
      本人間工学会第62回大会
    • Related Report
      2020 Research-status Report
  • [Presentation] 作業域内での荷物取り扱い動作経路推定における探索パラメータの影響2020

    • Author(s)
      瀬尾明彦, 細見昌範, 平内和樹
    • Organizer
      日本人間工学会関東支部第50回大会
    • Related Report
      2020 Research-status Report
    • Int'l Joint Research
  • [Presentation] 左右負荷の不均一さが荷物持ち上げ反復作業に与える影響2020

    • Author(s)
      矢治美穂,平内和樹,倉元昭季,瀬尾明彦
    • Organizer
      日本人間工学会第61回大会
    • Related Report
      2019 Research-status Report
  • [Presentation] 作業域内での身体負荷の可視化と低負荷動作経路の探索2020

    • Author(s)
      瀬尾明彦,平内和樹,倉元昭季
    • Organizer
      日本人間工学会第61回大会
    • Related Report
      2019 Research-status Report

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Published: 2019-04-18   Modified: 2024-01-30  

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