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Dynamics Based Fast NMPC for Hydraulic Arms

Research Project

Project/Area Number 21K03934
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 20010:Mechanics and mechatronics-related
Research InstitutionShinshu University

Principal Investigator

Sakai Satoru  信州大学, 学術研究院工学系, 教授 (90400811)

Project Period (FY) 2021-04-01 – 2024-03-31
Project Status Completed (Fiscal Year 2023)
Budget Amount *help
¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000)
Fiscal Year 2023: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2022: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2021: ¥2,080,000 (Direct Cost: ¥1,600,000、Indirect Cost: ¥480,000)
Keywords油圧アーム / 非線形モデル予測制御 / 油圧ロボット / ポート・ハミルトン系 / モデリング / カシミール関数 / 非線形制御 / 機械力学・制御 / 和圧 / ポートハミルトン系
Outline of Research at the Start

変化の遅い系(例:化学プラント,船舶)への実装から変化の速い系(例:剛体アーム)へ
の実装へと高速化が進展するモデル予測制御には,安全性保証のため,油圧アームへの実
装が期待されている.しかし変化の非常に速い非線形圧力ダイナミクスの存在によって計
算時間が許容されず,油圧アームへの実装は未解決である.
そこで,非線形動力学の特徴を駆使して,近似を介さず厳密に,かつ,高速に,モデル予測制御の油圧アームへの実装を解決する手法を提案して,提案手法の有効性を実験的に明らかとする.

Outline of Final Research Achievements

In hydraulic robotics and automation, NMPCs are expected in various application fields. The computational time of many NMPCs is a key since the dynamics is much faster than the conventional mechanical and chemical ones. NMPC computations should be exact, that is, dropping the nonlinear pressure dynamics should be avoided in terms of the safety. The report provides a set of four techniques. First, the original NMPC closed-loops by the pressures are transformed into another NMPC closed-loops by the Casimirs. The on-line optimization via the transformation was not investigated yet. Second, another NMPC closed-loops can be reduced into the other NMPC closed-loops by the sole Casimir and the nominal integrator. However, the contribution to NMPC computations via the reductions was not investigated yet. Finally, there were no papers to discuss the nondimensionalization of NMPC for hydraulic cylinder dynamics. In all, the computational time using the four techniques is studied in the report.

Academic Significance and Societal Importance of the Research Achievements

変化の遅い系(例:化学プラント,船舶)への実装から変化の速い系(例:剛体アーム)への実装へと高速化が進展するモデル予測制御には,対人対物安全性保証のため,油圧アームへの実装が期待されている.しかし変化の非常に速い非線形圧力ダイナミクスの存在によって計算時間が許容されず,油圧アームへの実装は未解決であった.しかし,提案解法は,近似を介さず「厳密に,かつ,高速に」モデル予測制御の油圧アームへの実装を解決する点が学術的意義である.
安全性を保証するNMPCの油圧アームへの実装が可能となったため,建設・農業・災害救助・地雷除去のおける作業機と作業者の新しい協働への道が開けたことが社会的意義である.

Report

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

    (19 results)

All 2022 2021 Other

All Int'l Joint Research (4 results) Journal Article (6 results) (of which Int'l Joint Research: 3 results,  Peer Reviewed: 6 results,  Open Access: 4 results) Presentation (9 results) (of which Int'l Joint Research: 5 results)

  • [Int'l Joint Research] Twente University(オランダ)

    • Related Report
      2022 Research-status Report
  • [Int'l Joint Research] Washington State University(米国)

    • Related Report
      2022 Research-status Report
  • [Int'l Joint Research] Washington State University(米国)

    • Related Report
      2021 Research-status Report
  • [Int'l Joint Research] Twente University(オランダ)

    • Related Report
      2021 Research-status Report
  • [Journal Article] Fast Search Method for Stable NMPC by Objective Nondimensionalization of Mechatronic Systems2022

    • Author(s)
      Satoru Sakai, Takumu Takagi, Yuichi Ikeda, Kohei Sawada, Tomoya Yokogawa
    • Journal Title

      Proceedings of IEEE/ASME International Conference on Advanced Intelligent Mechatronics (AIM)

      Pages: 442-448

    • DOI

      10.1109/aim52237.2022.9863269

    • Related Report
      2022 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] On the Uncertainty Analysis via Low Frequency Inputs for Hydraulic Cylinder Dynamics2022

    • Author(s)
      Teruo Kato, Satoru Sakai, Ryo Arai
    • Journal Title

      JFPS International Journal of Fluid Power System

      Volume: 15 Issue: 3 Pages: 95-100

    • DOI

      10.5739/jfpsij.15.95

    • ISSN
      1881-5286
    • Related Report
      2022 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Modification and Its Application of Identification Inputs for Hydraulic Arms2022

    • Author(s)
      加藤輝雄, 新井遼, 酒井悟
    • Journal Title

      TRANSACTIONS OF THE JAPAN FLUID POWER SYSTEM SOCIETY

      Volume: 53 Issue: 1 Pages: 10-17

    • DOI

      10.5739/jfps.53.10

    • NAID

      130008164006

    • ISSN
      1349-7022, 1880-3121
    • Related Report
      2022 Research-status Report 2021 Research-status Report
    • Peer Reviewed
  • [Journal Article] On the Geometric Featureless Visual Velocity of UGV in an Agriculture Scale2021

    • Author(s)
      Satoru Sakai, Daiki Nakabayashi
    • Journal Title

      Journal of Robotics and Mechatronics

      Volume: 33 Issue: 6 Pages: 1255-1264

    • DOI

      10.20965/jrm.2021.p1255

    • NAID

      130008131128

    • ISSN
      0915-3942, 1883-8049
    • Year and Date
      2021-12-20
    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Analytical, Experimental, and Numerical Investigation of Energy in Hydraulic Cylinder Dynamics of Agriculture Scale Excavators2021

    • Author(s)
      Arai Ryo, Sakai Satoru, Tatsuoka Akihiro, Zhang Qin
    • Journal Title

      Energies

      Volume: 14 Issue: 19 Pages: 6210-6210

    • DOI

      10.3390/en14196210

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Parameter Identification via Nominal Integrator of Hydraulic Cylinder Dynamics2021

    • Author(s)
      Satoru Sakai, Masaki Obara, Kenta Chikazawa
    • Journal Title

      IFAC MICNON

      Volume: 54 Issue: 14 Pages: 78-83

    • DOI

      10.1016/j.ifacol.2021.10.332

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Open Access
  • [Presentation] 非線形油圧アームの力制御系の解析2022

    • Author(s)
      宇佐美太一,酒井悟,新井遼
    • Organizer
      2022年春季日本フルードパワーシステム講演会
    • Related Report
      2022 Research-status Report
  • [Presentation] 非線形油圧アームの劣駆動和圧に関する一検証2022

    • Author(s)
      田中健太郎,酒井悟,新井遼
    • Organizer
      2022年秋季日本フルードパワーシステム講演会
    • Related Report
      2022 Research-status Report
  • [Presentation] Numerical Energy Behavior Analysis While Digging in Hydraulic Cylinder Dynamics of Agriculture Scale Excavators2022

    • Author(s)
      Ryo Arai, Satoru Sakai, Teruo Kato
    • Organizer
      SICE AC 2022
    • Related Report
      2022 Research-status Report
    • Int'l Joint Research
  • [Presentation] 非線形油圧アーム力制御のロバスト性について2022

    • Author(s)
      宇佐美太一, 近澤健太, 酒井悟
    • Organizer
      2021年フルードパワーシステム講演会
    • Related Report
      2021 Research-status Report
  • [Presentation] 油圧アームのための同定入力の修正法について2022

    • Author(s)
      加藤輝雄, 新井遼, 酒井悟
    • Organizer
      2021年春季フルードパワーシステム講演会
    • Related Report
      2021 Research-status Report
  • [Presentation] A Safety Problem of the Nonlinear Impedance Control for Collaborative Hydraulic Arms with Reachable Manifold2021

    • Author(s)
      Ryo Arai, Satoru Sakai
    • Organizer
      SICE MSCS/ISCS
    • Related Report
      2021 Research-status Report
    • Int'l Joint Research
  • [Presentation] An Experimental Validation of a Transformation between Output Spaces in Visual Feedback Control for Sloshing2021

    • Author(s)
      Atushi Takano, Satoru Sakai
    • Organizer
      SICE AC
    • Related Report
      2021 Research-status Report
    • Int'l Joint Research
  • [Presentation] Numerical Study on Identification Input for Nonlinear Hydraulic Arms2021

    • Author(s)
      Teruo Kato, Ryo Arai, Satoru Sakai
    • Organizer
      International Symposium of JFPS
    • Related Report
      2021 Research-status Report
    • Int'l Joint Research
  • [Presentation] On the Analysis of Energy Behaviors in Hydraulic Cylinder Dynamics via Modeling of Experimental Excavators2021

    • Author(s)
      Ryo Arai, Teruo Kato, Satoru Sakai
    • Organizer
      International Symposium of JFPS
    • Related Report
      2021 Research-status Report
    • Int'l Joint Research

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

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