Updated on 2025/12/22

写真a

 
Yuki NISHIMURA
 
Organization
Faculty of Environmental, Life, Natural Science and Technology Professor
Position
Professor
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Degree

  • 博士(情報科学) ( 2009.3   北海道大学 )

  • 修士(工学) ( 2005.3   北海道大学 )

Education

  • Hokkaido University   大学院情報科学研究科   システム情報科学専攻

    2005.4 - 2009.3

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  • Hokkaido University   大学院工学研究科   システム情報工学専攻

    2003.4 - 2005.3

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  • Hokkaido University   工学部   情報エレクトロニクス系システム工学科

    1998.4 - 2002.12

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Research History

  • Okayama University   学術研究院 環境生命自然科学学域(工)   Professor

    2025.4

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  • Kagoshima University   Graduate School of Science and Engineering   Associate Professor

    2012.4 - 2025.3

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  • Yamaguchi University   Graduate School of Science and Engineering   Assistant Professor

    2009.4 - 2012.3

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Papers

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Books

  • 理解しやすい制御工学

    柴田, 論, 穆, 盛林, 西村, 悠樹, 熊澤, 典良, 山本, 智規

    コロナ社  2025.5  ( ISBN:9784339032505

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    Total pages:viii, 206p   Language:Japanese

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MISC

  • 秘密計算を用いた暗号化ビジュアルフィードバック制御システムの構築

    田中 智樹, 池崎 太一, 西村 悠樹

    第26回計測自動制御学会システムインテグレーション部門講演会   2025.12

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  • 予見制御バリア関数を用いた確率的外乱に対する安全制御に関する研究

    合田 雅登, 西村 悠樹, 池崎 太一

    第34回計測自動制御学会中国支部学術講演会   2025.11

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  • 非ホロノミック車両における最短時間制御手法について

    高山 凌一朗, 西村 悠樹, 池崎 太一

    第34回計測自動制御学会中国支部学術講演会   2025.11

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  • 実験データを用いた不変楕円体に基づく制御器設計

    片岡 裕登, 池崎 太一, 西村 悠樹

    第34回計測自動制御学会中国支部学術講演会   2025.11

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  • FRITによるI-PD制御系の制御器調整と次数適合型目標仕様設計

    福井 流一郎, 池崎 太一, 西村 悠樹

    第34回計測自動制御学会中国支部学術講演会   2025.11

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  • Sliding mode control-based disturbance attenuation for pneumatic anti-vibration tables with two degrees-of-freedom

    村井成輝, 中村幸紀, 池崎太一, 岸本伊知郎, 橋本亘平, 西村悠樹

    電気学会研究会資料(Web)   ( CT-25-043-062 )   2025

  • Stabilization by noise for a nonholonomic system with quantitative evaluation of safety probability

    西村悠樹, 星野健太

    計測自動制御学会制御部門マルチシンポジウム(CD-ROM)   12th   2025

  • A consideration on anomaly sound detection with long short-term memory

    結城良太, 中村幸紀, 池崎太一, 西村悠樹

    電気学会研究会資料(Web)   ( CT-25-043-062 )   2025

  • VIMTを用いたドローンの位置・姿勢制御

    来見田廉人, 池崎太一, 中村幸紀, 西村悠樹

    電気学会研究会資料(Web)   ( CT-25-043-062 )   2025

  • Stochastic safety-critical control for compensating tracking errors of a marine vessel

    Matsuo To, Nishimura Yuki

    Proceedings of the Annual Conference of the Institute of Systems, Control and Information Engineers   68   460 - 463   2024.5

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    Language:Japanese   Publisher:The Institute of Systems, Control and Information Engineers  

    DOI: 10.11509/sci.sci24.0_460

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    Other Link: https://ndlsearch.ndl.go.jp/books/R000000004-I033538429

  • On safety-critical control design using stochastic control barrier functions Multi-Symposium on Control Systems

    西村悠樹, 星野健太

    計測自動制御学会制御部門マルチシンポジウム(CD-ROM)   11th   2024

  • Frontal collision prevention control for an electric wheelchair using an almost sure safety control law

    逸見啓, 西村悠樹

    計測自動制御学会システムインテグレーション部門講演会(CD-ROM)   25th   2024

  • Collision avoidance control using an almost sure control barrier function for a two-wheeled vehicle robot under stochastic vibration

    有村太一, 西村悠樹

    計測自動制御学会システムインテグレーション部門講演会(CD-ROM)   25th   2024

  • Quasi-minimum-time positioning control of an ultrasonic motor using almost-sure control barrier function

    有松和樹, 西村悠樹

    自動制御連合講演会講演論文集(Web)   67th   2024

  • Control design with state constraint for linear second-order system based on stochastic control barrier function

    吉次凌, 西村悠樹

    システム制御情報学会研究発表講演会講演論文集(CD-ROM)   67   523 - 528   2023.5

  • Linear optimal retulator with noise for a two-wheeled vehicle model

    中野一輝, 西村悠樹

    システム制御情報学会研究発表講演会講演論文集(CD-ROM)   67   517 - 522   2023.5

  • Collision prevention control for two-wheeled vehicle robot influenced by stochastic vibration

    YAMAOKA Takumi, NISHIMURA Yuki

    The Proceedings of JSME annual Conference on Robotics and Mechatronics (Robomec)   2023   1A2-I04   2023

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    Language:Japanese   Publisher:The Japan Society of Mechanical Engineers  

    Autonomous mobile robots are being utilized in various locations such as factories, residential and commercial buildings, and farmlands, and the market for autonomous mobile robots is expanding. Safety is a critical requirement for autonomous mobile robots to avoid collisions with surrounding objects. In this paper, we propose a control scheme based on the distance between a two-wheeled vehicle robot and an obstacle for collision avoidance. We implement a control barrier function to assist in collision avoidance on an actual machine. Additionally, we place the actual machine on a vibration machine and run it under conditions where artificial irregular disturbances are generated. By using a control law based on a control barrier function for probabilistic systems, we demonstrate the safety that can be guaranteed against irregular disturbances.

    DOI: 10.1299/jsmermd.2023.1a2-i04

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  • Stochastic safety-critical control ensuring the probability of safety

    西村悠樹, 星野健太

    計測自動制御学会制御部門マルチシンポジウム(CD-ROM)   10th   2023

  • Quasi-minimum time positioning control of an ultrasonic motor using control barrier function

    土田湧貴, 西村悠樹

    計測自動制御学会制御部門マルチシンポジウム(CD-ROM)   10th   1 - 6   2023

  • Report on the 22nd Annual Conference of System Integration Division (SI2021)

    NISHIMURA Yûki, DATE Hisashi

    Journal of The Society of Instrument and Control Engineers   61 ( 5 )   386 - 386   2022.5

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    Language:Japanese   Publisher:The Society of Instrument and Control Engineers  

    DOI: 10.11499/sicejl.61.386

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  • Editorial Essay

    SEKIGUCH Kazuma, NISHIMURA Yuki

    Journal of The Society of Instrument and Control Engineers   61 ( 2 )   171 - 171   2022.2

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    DOI: 10.11499/sicejl.61.171

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  • Why Nonlinear Control Is Not Common?

    OHTSUKA Toshiyuki, NAKAMURA Hisakazu, AKASAKA Daisuke, WADA Toshihiro, SEKIGUCH Kazuma, NISHIMURA Yuki

    Journal of The Society of Instrument and Control Engineers   61 ( 2 )   146 - 153   2022.2

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    DOI: 10.11499/sicejl.61.146

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    Other Link: https://ndlsearch.ndl.go.jp/books/R000000004-I032005241

  • Preface to Special Issue on the 21st SICE System Integration Division Annual Conference

    USHIMI Nobuhiro, KURAZUME Ryo, MURAKAMI Kouji, NISHIMURA Yuki

    Transactions of the Society of Instrument and Control Engineers   58 ( 1 )   1 - 1   2022

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    Language:Japanese   Publisher:The Society of Instrument and Control Engineers  

    DOI: 10.9746/sicetr.58.1

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  • Sontag-type nonlinear stochastic control for ship trajectory tracking

    Onitsuka Shu, Nishimura Yuki

    Proceedings of the Japan Joint Automatic Control Conference   65   738 - 743   2022

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    DOI: 10.11511/jacc.65.0_738

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  • On control design using stochastic control barrier functions

    Nishimura Yuki, Hoshino Kenta

    Proceedings of the Japan Joint Automatic Control Conference   65   497 - 500   2022

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    DOI: 10.11511/jacc.65.0_497

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  • Toward a Next-Generation System Control Theory by Searching for the True Dynamics

    NISHIMURA Yûki

    Journal of The Society of Instrument and Control Engineers   60 ( 5 )   327 - 330   2021.5

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    DOI: 10.11499/sicejl.60.327

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    Other Link: https://ndlsearch.ndl.go.jp/books/R000000004-I031527276

  • What is a Next-Generation System Control Theory? (Main Essay)

    EBIHARA Yoshio, OKU Hiroshi, KATAYAMA Hitoshi, SAKAMOTO Noboru, TSUMURA Koji, HIRATA Mitsuo, NISHIMURA Yûki, SAWADA Kenji

    Journal of The Society of Instrument and Control Engineers   60 ( 5 )   385 - 394   2021.5

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    DOI: 10.11499/sicejl.60.385

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    Other Link: https://ndlsearch.ndl.go.jp/books/R000000004-I031527327

  • What is a Next-Generation System Control Theory? (Introduction)

    NISHIMURA Yûki, SATOH Satoshi, SAWADA Kenji, OHKI Kentaro, HOSHINO Kenta, SATOH Yasuyuki, SADAMOTO Tomonori

    Journal of The Society of Instrument and Control Engineers   60 ( 5 )   381 - 384   2021.5

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    DOI: 10.11499/sicejl.60.381

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  • ラフシステム制御理論~確率システムを内包するより一般的な制御システム表現

    西村悠樹

    計測自動制御学会制御部門マルチシンポジウム(CD-ROM)   8th   2021

  • Almost sure trajectory restorion for stochastic controlled systems

    山本和弘, 西村悠樹

    システム制御情報学会研究発表講演会講演論文集(CD-ROM)   64   1065 - 1068   2020.5

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  • Almost sure trajectory restorion for a stochastic linear second-order systems

    Yamamoto Kazuhiro, Nishimura Yuki

    Proceedings of the Japan Joint Automatic Control Conference   63 ( 0 )   1232 - 1235   2020

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    DOI: 10.11511/jacc.63.0_1232

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  • Stochastic Stability Analysis Based on Non-Smooth Lyapunov Functions

    Nishimura Yuki

    SYSTEMS, CONTROL AND INFORMATION   64 ( 7 )   264 - 269   2020

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    Language:Japanese   Publisher:THE INSTITUTE OF SYSTEMS, CONTROL AND INFORMATION ENGINEERS  

    DOI: 10.11509/isciesci.64.7_264

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  • High-precision positioning control of an ultrasonic motor based on convergence rate design

    Nishiyama Tomoki, Nishimura Yuki

    Proceedings of the Japan Joint Automatic Control Conference   63 ( 0 )   876 - 879   2020

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    DOI: 10.11511/jacc.63.0_876

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  • 確率リャプノフ安定論~ノイズが導く多様な安定性 Reviewed

    西村 悠樹

    システム/制御/情報(別冊『確率システムシンポジウム50回記念』特集号』)   64B   34 - 39   2020

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  • On disturbance attenuation based on a non-smooth stochastic Lyapunov function

    西村悠樹

    計測自動制御学会制御部門マルチシンポジウム(CD-ROM)   7th   2020

  • Stabilization of a chained system by state-dependent rough paths

    田中聖人, 西村悠樹

    システム制御情報学会研究発表講演会講演論文集(CD-ROM)   63   681 - 684   2019.5

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  • Non-Smooth Stochastic Lyapunov Functions With Weak Extension of Viscosity Solutions

    Yuki Nishimura, Kenta Hoshino

    2019.3

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    Publishing type:Internal/External technical report, pre-print, etc.  

    This paper proposes a notion of viscosity weak supersolutions to build a<br />
    bridge between stochastic Lyapunov stability theory and viscosity solution<br />
    theory. Different from ordinary differential equations, stochastic differential<br />
    equations can have the origins being stable despite having no smooth stochastic<br />
    Lyapunov functions (SLFs). The feature naturally requires that the related<br />
    Lyapunov equations are illustrated via viscosity solution theory, which deals<br />
    with non-smooth solutions to partial differential equations. This paper claims<br />
    that stochastic Lyapunov stability theory needs a weak extension of viscosity<br />
    supersolutions, and the proposed viscosity weak supersolutions describe<br />
    non-smooth SLFs ensuring a large class of the origins being noisily<br />
    (asymptotically) stable and (asymptotically) stable in probability. The<br />
    contribution of the non-smooth SLFs are confirmed by a few examples;<br />
    especially, they ensure that all the linear-quadratic-Gaussian (LQG) controlled<br />
    systems have the origins being noisily asymptotically stable for any additive<br />
    noises.

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  • Stochastic disturbance attenuation based on nonlinear compensator Reviewed

    西村 悠樹

    Proceedings of the 2019 International Symposium on Nonlinear Theory & Its Applications   -   2019

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  • Stabilization of fourth-order chained system by state-dependent rough signals Reviewed

    西村 悠樹

    Proceedings of the 2019 International Symposium on Nonlinear Theory & Its Applications   -   2019

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  • Human Assist Control Based on Stochastic Control Barrier Function

    中村文一, 島村諒, 西村悠樹

    計測自動制御学会制御部門マルチシンポジウム(CD-ROM)   6th   2019

  • Finite-time positioning control of an ultrasonic motor with a chattering compensator

    木下亮, 西村悠樹, 谷口康太郎, 中村文一, 田中幹也

    計測自動制御学会制御部門マルチシンポジウム(CD-ROM)   6th   2019

  • On possibility of the reconstruction of stochastic Lyapunov stability theory based on rough path analysis

    西村悠樹

    自動制御連合講演会(CD-ROM)   62nd   2019

  • Unbounded-variation control theory based on rough path analysis

    西村悠樹

    計測自動制御学会制御部門マルチシンポジウム(CD-ROM)   6th   2019

  • Relaxation of sufficient conditions for asymptotic stability in probability by non-smooth stochastic Lyapunov functions

    西村 悠樹, 星野 健太

    システム制御情報学会研究発表講演会講演論文集   62   4p   2018.5

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  • Association of viscosity super-solutions with non-smooth stochastic Lyapunov functions

    Nishimura Yuki, Hoshino Kenta

    Proceedings of the Japan Joint Automatic Control Conference   61 ( 0 )   750 - 753   2018

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    Language:Japanese   Publisher:The Japan Joint Automatic Control Conference  

    DOI: 10.11511/jacc.61.0_750

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  • Vibration control using active dynamic absorber with adding noises

    渡邊寛久, 西村悠樹

    計測自動制御学会北海道支部学術講演会論文集   50th   2018

  • On Existence of Strong Solutions in Stochastic Finite-Time Stabilization

    星野健太, 西村悠樹

    計測自動制御学会制御部門マルチシンポジウム(CD-ROM)   5th   2018

  • Discussion on input signals for rough stabilization of nonholonomic systems

    竹内康貴, 西村悠樹

    計測自動制御学会北海道支部学術講演会論文集   50th   2018

  • Vibration control using active dynamic absorber with unification of homogeneous control laws

    木村修馬, 西村悠樹

    計測自動制御学会北海道支部学術講演会論文集   50th   2018

  • Stabilization of nonholonomic systems via rough path analysis

    竹内 康貴, 西村 悠樹

    システム制御情報学会研究発表講演会講演論文集   61   4p   2017.5

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  • On the Relationship Between Deterministic and Stochastic Systems Derived from Rough Path Analysis

    西村 悠樹

    システム制御情報学会研究発表講演会講演論文集   61   4p   2017.5

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  • Condition for Finite-Time Stability of State-Dependent Homogeneous Systems

    Hoshino Kenta, Nishimura Yûki

    Proceedings of the Japan Joint Automatic Control Conference   60 ( 0 )   658 - 661   2017

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    Language:Japanese   Publisher:The Japan Joint Automatic Control Conference  

    DOI: 10.11511/jacc.60.0_658

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  • Stabilization by Noise:-Influence of Artificial Wiener Processes on Dynamical Systems

    Nishimura Y&ucirc;ki

    SYSTEMS, CONTROL AND INFORMATION   61 ( 9 )   375 - 380   2017

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    Language:Japanese   Publisher:THE INSTITUTE OF SYSTEMS, CONTROL AND INFORMATION ENGINEERS  

    DOI: 10.11509/isciesci.61.9_375

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  • Stabilization by Noise : Influence of Artificial Wiener Processes on Dynamical Systems

    西村 悠樹

    システム・制御・情報 = Systems, control and information : システム制御情報学会誌   61 ( 9 )   375 - 380   2017

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  • Analysis of stochastic Lyapunov stability theory based on rough path analysis

    Nishimura Yuki

    Proceedings of the Japan Joint Automatic Control Conference   60 ( 0 )   771 - 774   2017

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    Language:Japanese   Publisher:The Japan Joint Automatic Control Conference  

    DOI: 10.11511/jacc.60.0_771

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  • Sufficient condition for finite-time stability of stochastic systems and its application to finite-time stabilization

    Hoshino Kenta, Nishimura Yûki

    Proceedings of the Japan Joint Automatic Control Conference   60 ( 0 )   799 - 803   2017

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    DOI: 10.11511/jacc.60.0_799

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  • Design of Homogeneous Feedback Laws for Nonlinear Stochastic Systems via Backstepping

    星野健太, 西村悠樹, 米山淳

    計測自動制御学会制御部門マルチシンポジウム(CD-ROM)   4th   2017

  • 超音波モータのチャタリング補償付き有限時間整定制御

    吉野裕之, 西村悠樹

    計測自動制御学会北海道支部学術講演会論文集   49th   2017

  • 量子フィードバック制御におけるモデル化について

    重越誠和, 西村悠樹

    計測自動制御学会北海道支部学術講演会論文集   49th   2017

  • 滑らかでないリャプノフ関数を用いた非ホロノミックシステムのノイズによる安定化

    宇都太賀, 西村悠樹

    計測自動制御学会北海道支部学術講演会論文集   49th   2017

  • ラフパス解析が導く非線形システムの隠れた制御入力

    竹内康貴, 西村悠樹

    計測自動制御学会北海道支部学術講演会論文集   49th   2017

  • 非線形確率システムにおける概有界化設計

    原希実, 西村悠樹

    計測自動制御学会北海道支部学術講演会論文集   49th   2017

  • 超音波モータのノイズ保証付き有限時間整定制御

    楠野良樹, 西村悠樹, 中村文一, 田中幹也

    システム制御情報学会研究発表講演会講演論文集(CD-ROM)   61st   2017

  • 非線形制御則を用いたアクティブ動吸振器の制振性能解析

    渡邊寛久, 西村悠樹, 近藤英二

    計測自動制御学会北海道支部学術講演会論文集   49th   2017

  • スライディングモード制御と線形制御による超音波モータの高精度サーボ制御

    楠野良樹, 西村悠樹

    計測自動制御学会北海道支部学術講演会論文集   49th   2017

  • Positioning Control of Ultrasonic Motor Using Homogeneous Finite-Time Control

    西村 悠樹, 吉野 裕之, 田中 幹也

    システム制御情報学会論文誌 = Transactions of the Institute of Systems, Control and Information Engineers   29 ( 6 )   235 - 241   2016.6

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    Language:Japanese   Publisher:システム制御情報学会  

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  • Stability of stochastic homogeneous systems and synthesis of homogeneous feedback laws

    Hoshino K., Nishimura Y., Yoneyama J.

    Proceedings of the Japan Joint Automatic Control Conference   59 ( 0 )   69 - 74   2016

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    <p>In this paper, we discuss the stability of stochastic homogeneous systems. Regarding the stability, we show that the homogeneity is strongly related to their convergence rates with respect to homogeneous norms. Based on the stability result, we deal with the stabilization of homogeneous control systems with guaranteed convergence rates. For the purpose of the guaranteed convergence rates, we show a design method of homogeneous stabilizing control laws. We also show numerical examples of the homogeneous stabilization.</p>

    DOI: 10.11511/jacc.59.0_69

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  • New stability definition of stochastic systems based on stochastic Lyapunov functions without smoothness at the origins

    Nishimura Y., Ito H.

    Proceedings of the Japan Joint Automatic Control Conference   59 ( 0 )   227 - 230   2016

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    <p>In this paper, we present a new stability notion for the origins of stochastic systems by identifying the origins into two categories and allowing stochastic Lyapunov functions without smoothness at the origins. The necessity of the definition is discussed by two simple examples; the one has no stochastic Lyapunov function smooth at the origin while the origin is stable in probability, and the other has a stochastic Lyapunov function without smoothness at the origin while the origin is not an equilibrium. Lyapunov-type characterizations and brief discussions are given to the new notion. Proofs, more rigorous materials and advanced/detailed discussions are presented in separate papers 15, 16).</p>

    DOI: 10.11511/jacc.59.0_227

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  • Asymptotic Stability in Probability Independent of Defining Stochastic Integrals

    Nishimura Y., Nakamura H.

    Proceedings of the Japan Joint Automatic Control Conference   59 ( 0 )   231 - 234   2016

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    <p>This paper provides sufficient conditions for asymptotic stability in probability independend of defining stochastic integrals. We confirm that a stochatic integral over a Wiener process has an unknown parameter by revisiting Stratonovich's definition of stochastic integrals, derive an infinitesimal operator including the parameter, and then define a stability such that an equilibrium of a stochastic system keeps stability under any value of the parameter. A useful condition for a linear stochatic system is also derived.</p>

    DOI: 10.11511/jacc.59.0_231

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  • Positioning Control of Ultrasonic Motor Using Homogeneous Finite-Time Control

    Nishimura Y&ucirc;ki, Yoshino Hiroyuki, Tanaka Kanya

    Transactions of the Institute of Systems, Control and Information Engineers   29 ( 6 )   235 - 241   2016

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    <p>Ultrasonic motors are available for the construction of precise positioning servo systems because of having high holding torque. However, deriving their dynamical models are generally difficult due to the complicated physical structures and a specific driving principle. Especially, their transient states in driving at high velocities need higher-order system models that are generally make the problems more difficult. In this paper, we provide a second-order linear system model for a ultrasonic motor by taking nonlinearity of steady-states into account. The modeling errors of transient states are compensated by a finite-time stabilizer based on homogeneous control Lyapunov functions. Then,after tuning the control parameters via computer simulation, we show the effectiveness of our servo system by comparing simulation and experimental results.</p>

    DOI: 10.5687/iscie.29.235

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  • Editorial Essay

    NISHIMURA Yuki

    Journal of The Society of Instrument and Control Engineers   55 ( 4 )   381 - 381   2016

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    DOI: 10.11499/sicejl.55.381

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  • 外乱状態安定性に基づく有限時間整定制御のチャタリング低減実験

    吉野裕之, 西村悠樹

    計測自動制御学会制御部門マルチシンポジウム(CD-ROM)   3rd   2016

  • アクティブ動吸振器における外乱状態抑制性能の解析

    石丸裕二, 西村悠樹, 近藤英二

    計測自動制御学会制御部門マルチシンポジウム(CD-ROM)   3rd   2016

  • Exponential Stabilization of Noholonomic Systems Using McShane-type Artificial Wiener Processes

    原 希実, 西村 悠樹

    システム制御情報学会研究発表講演会講演論文集   59   4p   2015.5

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  • Positioning Control of Ultrasonic Motor Using Homogeneous Finite-Time Control

    吉野 裕之, 西村 悠樹

    システム制御情報学会研究発表講演会講演論文集   59   4p   2015.5

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  • Increased sucking force of Vortex Cup attached a Cylinder in the Vortex Chamber

    川上 親久, 中尾 光博, 西村 悠樹, 近藤 英二

    フルードパワーシステム講演会講演論文集   2015   56 - 58   2015

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  • 壁面圧力計測と数値計算を用いた空気圧管路の流量推定

    中尾光博, 西村悠樹, 近藤英二

    計測自動制御学会産業応用部門大会講演論文集(CD-ROM)   2015   2015

  • SiC-MOSFETを用いた超音波モータの制御

    真野宙, 木下裕太, 中村文一, 西村悠樹

    計測自動制御学会制御部門マルチシンポジウム(CD-ROM)   2nd   2015

  • 旋回流を用いる非接触搬送装置ボルテックスカップの形状最適化に関する研究

    川上親久, 田中雄馬, 中尾光博, 西村悠樹, 近藤英二

    フルードパワーシステム講演会講演論文集   2015   2015

  • 非線形システムの確率漸近安定化における性質と適用可能範囲

    西村悠樹

    自動制御連合講演会(CD-ROM)   58th   2015

  • Path-Wise Definition of Integral Input-to-State Stability and Lyapunov Functions

    ITO Hiroshi, NISHIMURA Yuki

    IEICE technical report. Nonlinear problems   114 ( 288 )   17 - 22   2014.11

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    For stochastic nonlinear dynamical systems, path-wise probability is employed to define integral input-to-state stability and input-to-state stability in this paper. These notions are stricter than popular counterparts which take probability at each instant. Some of Lyapunov characterizations for the path-wise notions developed by the authors are outlined and compared with the ones for instantaneous probability. This note briefly sketches several preliminary results. More advanced results, details and other insightful discussions are reported elsewhere.

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  • Stabilization by Noise Based on Stochastic Lyapunov Stability Theory

    NISHIMURA Yuki

    IEICE technical report. Nonlinear problems   114 ( 288 )   23 - 28   2014.11

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    In this paper, we consider sufficient conditions that the addition of white noises helps the origins of Stratonovich-type stochastic systems become asymptotically stable in probability. We firstly extend the basic notion of stochastic asymptotic stability. Furthermore, we also define "artificial Wiener processes" to justify the choise of Stratonovich-type. Then, we clarify the design of nonlinear diffusion coefficients is effective for the strategy of stabilization by noise.

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  • Analysis of non-linear dynamical characteristics and servo control modeling for ultrasonic motor

    佐久間 悠, 西村 悠樹, 近藤 英二

    システム制御情報学会研究発表講演会講演論文集   58   3p   2014.5

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  • 「フィードバック制御理論─安定化と最適化─」(Ph. D.志水清孝 著)

    西村 悠樹

    計測と制御   53 ( 12 )   1153 - 1153   2014

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    DOI: 10.11499/sicejl.53.1153

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  • 厳密微分器による超音波モータのサーボ制御性能改善

    樋口裕太郎, 西村悠樹, 近藤英二, 中尾光博

    計測自動制御学会北海道支部学術講演会論文集   46th   2014

  • 非線形系の確率・確定雑音安定性と結合-リアプノフ法の比較-

    伊藤博, 西村悠樹

    計測自動制御学会制御部門マルチシンポジウム(CD-ROM)   1st   2014

  • 局所半凹確率制御Lyapunov関数を使った非線形システムの確率安定化

    中村文一, 西村悠樹

    計測自動制御学会制御部門マルチシンポジウム(CD-ROM)   1st   2014

  • Revisitation of stochastic Lyapunov theory

    西村 悠樹

    システム制御情報学会研究発表講演会講演論文集   57   4p   2013.5

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  • 1G5 Estimation of Pressure Distribution of the Standing Wave in Pneumatic Pipeline Using a Kalman Filter

    KINJO Nanami, NAKAO Mitsuhiro, NISHIMURA Yuki, KONDO Eiji

    The Proceedings of Conference of Kyushu Branch   2013 ( 0 )   205 - 206   2013

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    DOI: 10.1299/jsmekyushu.2013.205

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  • 1110 Estimation of Small Amplitude Pressure Wave in Pneumatic Pipeline Using Kalman Filter

    NAKAO Mitsuhiro, Nishimura Yuki, KONDO Eiji

    The Proceedings of Conference of Kyushu Branch   2013 ( 0 )   375 - 376   2013

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    DOI: 10.1299/jsmekyushu.2013.66.375

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  • 非線形確率システムの小ゲイン条件と特徴

    伊藤博, 西村悠樹

    自動制御連合講演会(CD-ROM)   56th   2013

  • Estimation of Small Amplitude Pressure Wave in Gaseous Pipeline Using a Linear Kalman Filter

    中尾光博, 西村悠樹, 近藤英二

    日本機械学会論文集 C編(Web)   79 ( 804 )   2013

  • 超音波モータにおける位置決め制御のための非線形モデリング

    國友貴夫, 西村悠樹

    計測自動制御学会制御部門大会(CD-ROM)   13th   2013

  • 非線形確率システムの確率有限時間整定制御

    上原理, 西村悠樹

    計測自動制御学会制御部門大会(CD-ROM)   13th   2013

  • 竹内康人氏の討論に対する回答

    田中 幹也, 内堀 晃彦, 春山 和男, 西村 悠樹, 内門 茂, RAHMAN Faridah Abd

    電気学会論文誌. D, 産業応用部門誌 = The transactions of the Institute of Electrical Engineers of Japan. D, A publication of Industry Applications Society   132 ( 1 )   132 - 132   2012.1

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    本記事に「抄録」はありません。

    DOI: 10.1541/ieejias.132.132

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  • 非線形システムの入出力線形化に対する新しいアプローチ

    岡島寛, 西村悠樹, 松永信智

    計測自動制御学会制御部門大会(CD-ROM)   12th   2012

  • 動吸振器によるエンドミル工具系の振動低減

    下永吉 良仁, 近藤 英二, 松元 健太, 西村 悠樹, 堂園 幸太

    精密工学会学術講演会講演論文集   2012 ( 0 )   159 - 160   2012

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    エンドミル加工の高精度化に伴って,切削中に生じる振動による加工精度の低下が問題となっている.振動抑制方法の一つに動吸振器を利用するという方法がある.セミアクティブ型動吸振器である可変剛性型動吸振器は,動吸振器の固有振動数を任意に変えることができるため,断続切削で生じる強制振動の大幅な低減が期待できる.そこで,本研究では,可変剛性型動吸振器による主軸ヘッドの振動低減効果を調べた.

    DOI: 10.11522/pscjspe.2012A.0.159.0

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  • 多様体上の制御系の最適制御の近似解法について

    都築卓有規, 西村悠樹

    計測自動制御学会制御部門大会(CD-ROM)   12th   2012

  • 非線形アフィンシステムの確率制御Lyapunov関数を用いた時不変連続な漸近安定化フィードバック制御則の設計法

    星野健太, 西村悠樹, 山下裕, 椿野大輔

    計測自動制御学会制御部門大会(CD-ROM)   12th   2012

  • 概漸近安定性に基づく確率Lyapunov安定論

    西村悠樹, 田中幹也, 若佐裕治

    計測自動制御学会制御部門大会(CD-ROM)   12th   2012

  • FRITと逐次最小2乗法によるオンライン型制御器調整

    若佐裕治, 田中幹也, 西村悠樹

    計測自動制御学会制御部門大会(CD-ROM)   12th   2012

  • 大域的漸近安定化のための確率的フィードバック制御則の逆最適性

    星野健太, 西村悠樹, 山下裕

    制御理論シンポジウム資料   41st   2012

  • 概生存可能性に基づく確率1での漸近安定性

    西村悠樹

    制御理論シンポジウム資料   41st   2012

  • 制御Lyapunov関数を用いた超音波モータの非線形ロバスト角度制御

    西村悠樹, 田中幹也, 中村文一

    自動制御連合講演会(CD-ROM)   55th   2012

  • Lyapunov Stability Theory for Stochastic Systems(<Special Issue>Advanced Applications of Probability Theory in Systems, Control and Information)

    NISHIMURA Yuki

    SYSTEMS, CONTROL AND INFORMATION   55 ( 12 )   513 - 518   2011

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    DOI: 10.11509/isciesci.55.12_513

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  • Safety confirmation system with pulse wave measuring

    Saori YAMAMOTO, Kanya TANAKA, Yuki NISHIMURA, Yuji WAKASA

    Proceedings of the Japan Joint Automatic Control Conference   54 ( 0 )   380 - 380   2011

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    The number of the elderly person who lives alone is increasing recently in Japan. With this, lonely death of the elderly person becomes the big problem. To solve this problem, the study of the safety confirmation system for elderly people becomes active. In this study, we measure a pulse wave and build a safety confirmation system calculating the pulse based on this. We have inspected the usefulness of this system in a field examination.

    DOI: 10.11511/jacc.54.0.380.0

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  • 上肢障害者用食事支援ロボットのインタフェース

    久坂哲也, 田中幹也, 西村悠樹, 若佐裕治

    電気・情報関連学会中国支部連合大会講演論文集(CD-ROM)   62nd   2011

  • 時変パラメータをもつPSOアルゴリズムの制御理論的解析

    若佐裕治, 田中幹也, 西村悠樹

    システム制御情報学会研究発表講演会講演論文集(CD-ROM)   55th   2011

  • チェインドシステムに対する大域連続確率安定化制御

    西村悠樹, 田中幹也, 若佐裕治, 山下裕

    制御理論シンポジウム資料   40th   2011

  • 正弦波PWMインバータのロバスト制御器設計

    若佐裕治, 馬場雄介, 田中俊彦, 田中幹也, 西村悠樹

    制御理論シンポジウム資料   40th   2011

  • 超音波モータの知的IMC-PID制御

    吉本匡志, 田中幹也, 若佐祐治, 西村悠樹

    計測自動制御学会中国支部学術講演会論文集   20th   2011

  • 逐次最小2乗法によるオンライン型FRIT

    若佐裕治, 田中幹也, 西村悠樹

    計測自動制御学会中国支部学術講演会論文集   20th   2011

  • TD学習法を用いたLQIゲインチューニングによる超音波モータの位置決め制御

    山口達也, 西村悠樹, 田中幹也, 若佐裕治

    計測自動制御学会中国支部学術講演会論文集   20th   2011

  • 複数超音波レーダを用いた離床検知システム

    吉武昇太, 田中幹也, 若佐裕治, 西村悠樹, 春山和男

    生活生命支援医療福祉工学系学会連合大会講演論文集(CD-ROM)   2011   2011

  • Approximate Solutions to Nonlinear Optimal Regulator Problems using Quantization of Markov Processes

    NISHIMURA Yuki, WAKASA Yuji, TANAKA Kanya

    Proceedings of the Annual Conference of the Institute of Systems, Control and Information Engineers   10 ( 0 )   126 - 126   2010

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    非線形システムの最適レギュレータはHamilton-Jacobi-Bellman方程式から得られる.しかし,同方程式は非線形偏微分方程式であるため解を得るのが困難である.この問題に対し,近年,最適制御系を拘束力学系とみなして正準量子化し,HJB方程式と等価なSchroedinger方程式を導く手法が示されている.本稿では,Schroedinger方程式と局所的に一致するマスター方程式を持つMarkov過程を考えることで,非線形最適レギュレータの近似解法を構築する.

    DOI: 10.11509/sci.SCI10.0.126.0

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  • Direct PID Tuning with Dead-Zone Compensation and Its Application to Ultrasonic Motors

    Wakasa Yuji, Kanagawa Shinji, Tanaka Kanya, Nishimura Yuki

    Proceedings of the Annual Conference of the Institute of Systems, Control and Information Engineers   10 ( 0 )   349 - 349   2010

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    本研究では、1回の実験データから直接PIDゲインを調整するFictitious Reference Iterative Tuning (FRIT)を不感帯をもつシステムに適用する方法を提案する。制御対象は入力部に不感帯をもつと仮定し、この不感帯の逆関数をPID制御器に後段に挿入した制御系を考える。不感帯幅をパラメータとしてFRITに組み込むことにより、従来よりも良い制御性能が得られるようになる。提案法を使用環境によって不感帯の変化しやすい超音波モータに適用し、その有効性を検証する。

    DOI: 10.11509/sci.SCI10.0.349.0

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  • 温湿度計測システムに関する研究

    田口好恵, 西村悠樹, 田中幹也, 若佐裕治

    電気・情報関連学会中国支部連合大会講演論文集(CD-ROM)   61st   2010

  • 神経筋骨格系に対する双対分解に基づく分散型運動制御モデル

    浜田美智典, 岩本明文, 若佐裕治, 田中幹也, 西村悠樹

    計測自動制御学会中国支部学術講演会論文集   19th   2010

  • 超音波レーダ型転倒検知通報システムに関する研究

    碁盤昂希, 春山和男, 西村悠樹, 若佐裕治, 田中幹也

    計測自動制御学会中国支部学術講演会論文集   19th   2010

  • ヒステリシスを考慮したFRITによるSMAアクチュエータの制御

    鶴田敏成, 金川慎史, 若佐裕治, 田中幹也, 西村悠樹

    計測自動制御学会中国支部学術講演会論文集   19th   2010

  • 複合Poisson過程を含む確率システムに対するMarkov過程量子化を用いたLyapunov関数の構築法

    西村悠樹, 田中幹也, 山下裕

    制御理論シンポジウム資料   39th   2010

  • 双対分解に基づく神経筋骨格系の分散型運動制御モデル

    若佐裕治, 田中幹也, 西村悠樹

    制御理論シンポジウム資料   39th   2010

  • 指数1のHessenberg型微分代数方程式系の最適レギュレータ問題に対するHJB量子化を用いた近似解法

    西村悠樹, 田中幹也, 若佐裕治

    制御理論シンポジウム資料   39th   2010

  • 超音波モータのPSOを用いた知的IMC-PID制御

    伊妻恭平, 田中幹也, 若佐裕治, 西村悠樹

    計測自動制御学会中国支部学術講演会論文集   18th   2009

  • 上肢不自由者用食事支援ロボットの開発

    金森翔一, 西村悠樹, 若佐祐治, 田中幹也, 岡正人

    計測自動制御学会中国支部学術講演会論文集   18th   2009

  • 送信信号デューティ比変更法による超音波レーダ型離床検知装置の非干渉化

    春山和男, 山田陽, 田中幹也, 若佐裕治, 西村悠樹

    生活支援工学系学会連合大会講演予稿集   7th (CD-ROM)   2009

  • 上肢障害者のための食事支援ロボット

    小松真司, 田中幹也, 若佐裕治, 西村悠樹, 岡正人

    生活支援工学系学会連合大会講演予稿集   7th (CD-ROM)   2009

  • 独居高齢者用安否確認システム

    松本直樹, 田中幹也, 若佐裕治, 西村悠樹, 春山和男, 内堀晃彦

    電気学会電子・情報・システム部門大会講演論文集(CD-ROM)   2009   2009

  • 主双対分解による分散型モデル予測コンセンサス

    若佐裕治, 荒川瑞恵, 岩本明文, 田中幹也, 西村悠樹

    制御理論シンポジウム資料   38th   2009

  • Markov跳躍系に対するLyapunov関数構築法について

    西村悠樹, 山下裕, 田中幹也, 若佐裕治

    制御理論シンポジウム資料   38th   2009

  • 複数特異点をもつ制御系のブラウン運動を利用した大域漸近安定化

    竹原和生, 西村悠樹, 都築卓有規, 山下裕

    制御理論シンポジウム資料   37th   2008

  • Stochastic Lyapunov Function Design using Quantization of Markov Process

    NISHIMURA Yuki, YAMASHITA Yuh

    IEICE technical report   107 ( 399 )   47 - 52   2007.12

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    Language:Japanese   Publisher:The Institute of Electronics, Information and Communication Engineers  

    In this paper, we propose a stochastic Lyapunov function design method using a difference approximation scheme and quantization of the Markov process. We approximate a stochastic Lyapunov equation by a Schrodinger-like equation. We obtain sufficient conditions for the stochastic Lyapunov function. The discretized stochastic Lyapunov function is obtained from the eigenvalue problem of a sparse matrix, which is generated by a Hamiltonian operator of the Schrodinger-like equation.

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  • 把持過程における対象の性状認識

    西村悠樹, 木山貴裕, 藤原康豊, 村岡茂信

    計測自動制御学会関西支部シンポジウム講演論文集   2006   2007

  • On construction of Lyapunov function using finite-difference approximation

    西村悠樹, 山下裕

    制御理論シンポジウム資料   35th   2006

  • On the stabilization problem for the horizontal two-link underactuated robot arm

    西村悠樹, 山下裕

    制御理論シンポジウム資料   34th   2005

  • Approximate Solutions of a Regulator Problem Using Perturbation Method

    西村悠樹, 島公すけ

    制御理論シンポジウム資料   32nd   2003

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Research Projects

  • Human assist control for safe personal mobilities

    Grant number:22H01514  2022.04 - 2025.03

    Japan Society for the Promotion of Science  Grants-in-Aid for Scientific Research  Grant-in-Aid for Scientific Research (B)

    中村 文一, 西村 悠樹, 佐藤 康之

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    Grant amount:\17290000 ( Direct expense: \13300000 、 Indirect expense:\3990000 )

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  • Human assist control for safe personal mobilities

    Grant number:23K22784  2022.04 - 2025.03

    Japan Society for the Promotion of Science  Grants-in-Aid for Scientific Research  Grant-in-Aid for Scientific Research (B)

    中村 文一, 西村 悠樹, 佐藤 康之

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    Grant amount:\17290000 ( Direct expense: \13300000 、 Indirect expense:\3990000 )

    自動車や船舶などの事故が大きな社会問題となる現代において,問題発生時の自動的な安全停止などリスク最小化移行技術が重要技術となってきている.本研究は,零化バリア関数を用いた,入力制約,外乱,システムのパラメータ誤差を考慮した広範囲の社会実装に耐えうる安全アシスト制御理論の構築を行い,電動車いす等への制御則を実装し実機実験によって制御理論の有効性を示すことが目的である.
    本年度は,理論的な研究成果として,入力制約を有する制御システムに対してViability Kernelに基づく厳密零化制御バリア関数を提案し,1入力の場合における制御則の連続性を示した.安全集合が閉集合,特にコンパクト集合である場合において,安全性は安全集合内の制御系の性質ではなく,安全集合外部,すなわち危険集合における制御系の性質であることを明らかにできた.また,実用安定性アシスト制御を用いた自動車のレーンキープ制御法を提案した.これらの理論的な研究成果についてはコンピュータシミュレーションにより有効性を示した.
    安全アシスト制御理論のパーソナルモビリティへの応用を考える際に,危険度の可視化は重要な技術である.本年度は,仮想入力を用いることにより,操作者に対する安全性の可視化法を開発した.また,深度センサ,RGBカメラを用いた画像提示システムの開発に成功した.
    また,本研究課題における実機実験におけるC#を用いた疑似リアルタイム制御について解説論文にまとめた.

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  • Construction of a Next-Generation Control Theory Driven by Highly-Complex Signals

    Grant number:20H02171  2020.04 - 2024.03

    Japan Society for the Promotion of Science  Grants-in-Aid for Scientific Research  Grant-in-Aid for Scientific Research (B)

    西村 悠樹, 佐藤 訓志, 中村 文一, 星野 健太

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    Grant amount:\17680000 ( Direct expense: \13600000 、 Indirect expense:\4080000 )

    政府の「未来投資戦略2018」で求められている次世代モビリティや航空宇宙産業の理論的支柱であるシステム制御理論において,システムが持つ非線形性・不規則性・不連続性・高周波振動性等の複雑な性質を解析し制御設計に役立てる必要がある。本研究課題では,これら複雑な性質を高度複雑信号(ラフ信号)と捉え,その統一表現である非線形ラフシステムに基づく制御理論を提唱する。また,当該理論を電気系・ドローン・宇宙機の制御問題などに応用する。
    2021年度は2年目であったが,初年度に引き続き本研究課題の根幹部分について理論構築するとともに,実験環境を整備した。具体的には以下を実施した。
    理論面では,スライディングモード制御のように不連続特性を持つシステムのラフシステム化を開始するため、確率安定論的側面からの解析を引き続き実施した。また,非線形確率システムにおける安定論の再整理を伴うラフシステムへの本格的な拡張のため,非平滑確率リャプノフ関数や確率有限時間安定性・確率有界性についての考察を続けた。
    応用面では,電動車椅子の実験環境整備と制御のための既存結果の追実験を実施してラフ制御への糸口を探ったほか,超音波モータのラフ制御化のための有限時間整定制御を確率論をベースに検討し,サーボ制御実験を行った。そのほか,ラフ制御をするために有用と考えられる応用研究として,非線形制御理論に基づくロボットアームの衝突回避制御や船舶の軌道追従制御,非線形確率制御理論に基づくクアッドコプタの最適姿勢制御や宇宙機の姿勢制御などについて引き続き検討を続けた。

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  • Human assist control theory based on control barrier function

    Grant number:19H02162  2019.04 - 2022.03

    Japan Society for the Promotion of Science  Grants-in-Aid for Scientific Research  Grant-in-Aid for Scientific Research (B)

    Nakamura Hisakazu

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    Grant amount:\17420000 ( Direct expense: \13400000 、 Indirect expense:\4020000 )

    As results of the research project, we have proposed a time-varying control barrier function and a collision avoidance control method. Moreover, we have developed a novel human assist control method which can consider shapes of control objects. Furthermore, we have proposed a strict zeroing control barrier function based. With the function, we can design a human assist control method based on zeroing control barrier functions.

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  • Construction of nonlinear stochastic robust control theory based on non-Markov model and discontinuous feedback

    Grant number:17H03282  2017.04 - 2020.03

    Japan Society for the Promotion of Science  Grants-in-Aid for Scientific Research  Grant-in-Aid for Scientific Research (B)

    Nishimura Yuki

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    Grant amount:\17940000 ( Direct expense: \13800000 、 Indirect expense:\4140000 )

    Many technologies for the realization of super-smart society are generally influenced by irregular noises and vibrations. The aim of this study was to construct a stochastic stability theory for analyzing and controlling stochastic nonlinear systems, especially achieving the elimination and attenuation for irregular system noises in a practical view point. In this study, we analyzed various singular properties of stability for nonlinear stochastic systems, and then tried developing nonlinear stochastic robust control easily applied to practical systems. The validity of the proposed methods was confirmed by numerical simulation and some experimental results.

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  • Development of Control Theory for Unbounded-Variation Systems Based on Rough Path Analysis

    Grant number:16K14287  2016.04 - 2020.03

    Japan Society for the Promotion of Science  Grants-in-Aid for Scientific Research  Grant-in-Aid for Challenging Exploratory Research

    Nishimura Yuki

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    Grant amount:\3770000 ( Direct expense: \2900000 、 Indirect expense:\870000 )

    The aim of this study was to build a basic theory of stabilization for dynamical systems driven by unbounded-variation signals, named "rough controlled systems", which are augmented systems of stochastic differential equation systems. In this study, we obtained system representations of the dynamics of rough controlled systems via rough path analysis, derived a new sufficient condition for controllability of nonlinear controlled systems influenced by unbounded-variation signals, and developing a control strategy by using correction terms, which represents the effects of unbounded-variation signals. Then, we also try extending stochastic stability analysis to rough controlled systems.

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  • Development of topological control theory for decision making

    Grant number:15H04022  2015.04 - 2018.03

    Japan Society for the Promotion of Science  Grants-in-Aid for Scientific Research  Grant-in-Aid for Scientific Research (B)

    Nakamura Hisakazu

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    Grant amount:\16770000 ( Direct expense: \12900000 、 Indirect expense:\3870000 )

    This research aims to design a framework of combining decision and control from the view point of topology. The major achievements are as follows. Development of a control strategy that dynamically identifies the desired state by the minimum projection method, development of the local minimum connection method for static control Lyapunov function design, and development of a human safety assist control strategy by using control barrier functions. By the preceding achievements, this research elucidates that a control Lyapunov function and a control barrier function are effective for the combination of decision and control.

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  • Construction of nonlinear stochastic optimal control theory for attenuating system noises

    Grant number:25820184  2013.04 - 2017.03

    Japan Society for the Promotion of Science  Grants-in-Aid for Scientific Research  Grant-in-Aid for Young Scientists (B)

    Nishimura Yuki

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    Grant amount:\4290000 ( Direct expense: \3300000 、 Indirect expense:\990000 )

    We derived conditions that stochastic stability for dynamical systems is not influenced by their system noises, and then proposed sufficient conditions that the trajectories of controlled systems converge to some (weak) invariant set. The forms of stochastic Lyapunov functions, ensuring stochastic asymptotic stability, are relaxed to non-differentiable in order to increase the number of stabilizable stochastic systems. The sufficient conditions for stochastic integral-input-to-state stability and almost sure bounded stability were also derived, respectively. And then, stabilization strategy for nonholonomic systems by adding Gaussian white noises was developed.

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  • Study on the nonlinear control using transformation to state-jump system

    Grant number:22360167  2010 - 2012

    Japan Society for the Promotion of Science  Grants-in-Aid for Scientific Research  Grant-in-Aid for Scientific Research (B)

    YAMASHITA Yuh, NAKAMURA Hisakazu, NISHIDA Gou, NISHIMURA Yuki, TSUZUKI Takayuki

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    Grant amount:\16770000 ( Direct expense: \12900000 、 Indirect expense:\3870000 )

    his study proposes a framework of control system design methodologies bywhich the state space of a dynamical controlled object is extended by adding new continuous or discretecoordinates and a desired closed-loop is designed on the augmented space allowing state-jumps on thenew coordinates. Furthermore, methods of the degeneracy of the extended space for obtaining adiscontinuous static feedback law or a control law with discrete states are given. By introducingstate-jumps, we can construct a controller mathematically even for decision-making problems of thedynamical systems.

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  • Construction of nonlinear optimal control theory based on fusion of quantization methods for HJB equations and stochastic processes

    Grant number:22760320  2010 - 2012

    Japan Society for the Promotion of Science  Grants-in-Aid for Scientific Research  Grant-in-Aid for Young Scientists (B)

    NISHIMURA Yuki

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    Grant amount:\4160000 ( Direct expense: \3200000 、 Indirect expense:\960000 )

    To stabilize nonlinear control systems such as nonholonomic systems, discontinuous state-feedback control laws should be designed 。 Furthermore, energy conservation measures are recently required for controlling mechanical and electrical dynamical systems。 To solve the problems at one time, this research has proposed a new numerical approximation method for nonlinear optimal regulator problems by combining two quantization methods of Hamilton-Jacobi-Bellman equations and stochastic processes。 The industrial value of the proposed method has been confirmed by the experimental researches of controlling ultrasonic motors。

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  • Establishment of nonlinear control theory taking into account global structure of manifold

    Grant number:19560435  2007 - 2009

    Japan Society for the Promotion of Science  Grants-in-Aid for Scientific Research  Grant-in-Aid for Scientific Research (C)

    YAMASHITA Yuh, NAKAMURA Hisakazu, NISHIDA Gou, NISHIMURA Yuki

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    Grant amount:\4420000 ( Direct expense: \3400000 、 Indirect expense:\1020000 )

    This study presents a general framework for controlling nonlinear systems on general manifolds including non-Euclidean spaces which precedent control theories cannot handle. Global attitude control of satellites, obstacle avoidance of vehicles, and control of acrobots are examples of our problem. This framework provides design procedures generating control laws automatically with discontinuity, logic, or randomness, of which properties are necessary to stabilize such systems on non-Euclidean spaces.

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Class subject in charge

  • Systems Control Ⅰ (2025academic year) Third semester  - 月7~8,木3~4

  • Systems Control Ⅱ (2025academic year) Second semester  - 金5~6

  • Systems Control Ⅱ (2025academic year) Second semester  - 金5~6

  • Advanced Course on Systems Control and Optimization (2025academic year) Prophase  - 月5~6

  • Advanced Course on Systems Control and Optimization (2025academic year) Prophase  - 金3~4

  • Systems Control I (2025academic year) Third semester  - 月7~8,木3~4

  • Exercise on Robotics and Intelligent Systems Engineering 1 (2025academic year) Prophase  - その他

  • Exercise on Robotics and Intelligent Systems Engineering 2 (2025academic year) Late  - その他

  • Basic Robotics (2025academic year) Second semester  - 金7~8

  • Basic Robotics (2025academic year) Second semester  - 金7~8

  • Advanced Study (2025academic year) Other  - その他

  • Intelligent Machine Control System (2025academic year) Prophase  - その他

  • Seminar in Intelligent Machine Control (2025academic year) Other  - その他

  • Seminar in Intelligent Machine Control (2025academic year) Year-round  - その他

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