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nobuyuki sowa Last modified date：2023.03.07

Assistant Professor / Dynamics of Mechanical Systems
Department of Mechanical Engineering
Faculty of Engineering


Graduate School
Department of Mechanical Engineering
Graduate School of Engineering
Undergraduate School
Department of Mechanical and Aerospace Engineering
School of Engineering


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Homepage
https://kyushu-u.pure.elsevier.com/en/persons/nobuyuki-sowa
　Reseacher Profiling Tool　Kyushu University Pure
https://dynamic.mech.kyushu-u.ac.jp/index.html
Dynamics of Machinery Lab.,Dept. of Mechanical Engineering, Faculty of Engineering, Kyushu University .
Phone
092-802-3196
Fax
092-802-3255
Academic Degree
master(engineering)
Country of degree conferring institution (Overseas)
No
Field of Specialization
dynamics and control
Total Priod of education and research career in the foreign country
00years00months
Outline Activities
My main research topics are 1) Countermeasures for Unstable Vibratins Caused by Time Delay, 2)Studies for Vibration Analysis and Stability of Large Scale Nonlinear Systems, 3) Studies of Elimination of the Natural Frequency Component . I am in charge of experiments on mechanical dynamics for third-year undergraduate students and of lectures on mechanics and practices on mechanical dynanamics and mechanical vibration for second- and third-year undergraduates.
Research
Research Interests
  • New diagnostic technique using ultrasound wave
    keyword : diagnostic technique，ultrasound wave
    2022.04Prevention Method for Unstable Vibration Caused by Time Delay in Contact Rotating Systems.
  • Elucidation of Operating Mechanism of Dynamic Absorber for Parametric Excitation System　and Development of Optimization Method
    keyword : Selfexcited vibration, dynamic absorber
    2013.04Prevention Method for Unstable Vibration Caused by Time Delay in Contact Rotating Systems.
  • Elimination Method of Natural Frequency
    keyword : Vibration Control, Montion Control, Robust Control
    2001.04Study on Subspace Contorl.
  • Low Frequency Vibration of a Vibroimpact System
    keyword : self-Excited Vibration, Stability, Dynamics, Characteristic Multiplier, Variation
    2018.04～2021.03.
  • Study of Subspace Control
    keyword : Vibration Control, Montion Control, Robust Control
    2001.04～2020.03Study on Subspace Contorl.
  • Study on Flexible Manipulator
    keyword : Vibration Control, Motion Control, Robust Control
    2007.04～2020.03Study on Flexible Manipulator.
Academic Activities
Papers
 Show All Papers >>
1. Optimum Design of Dynamic Absorber for Pattern Formation Phenomena Generated in Contact Rotating Systems (3rd Report, In the Case of a Multi-Degree-of-Freedom System).
2. Optimum Design of Dynamic Absorber for Pattern Formation Phenomena Generated in Contact Rotating Systems (2nd Report, Experimental Verification of Single-Degree-of-Freedom Viscoelastic Model).
3. Nobuyuki Sowa, Takahiro Kondou, Kousuke Hayash, Experimental Verification of Prevention method Using Dynamic Absorbers for Unstable Vibration Caused by Time Delay Due to Viscoelastic Deformation, Proceedings of Asia-Pacific Vibration Conference 2009, CD-ROM, No.115, 2009.11.
4. Mizue Koga, Takahiro Kondou, Nobuyuki Sowa, Vibration Characteristics of Nonlinear Time Delay System, Proceedings of Asia-Pacific Vibration Conference 2007, CD-ROM, OS08-2-3,No.137, 2007.08.
5. Nobuyuki Sowa, Takahiro Kondou, Hiroki Mori, Myung-Soo Choi, Prevention Method using Dynamic Absorbers for Unstable Vibration Caused by Time Delay in Contact Rotating Systems , Proceedings of Asia-Pacific Vibration Conference 2007, CD-ROM, OS16-2-3, No.140, 2007.08.
Presentations
 Show All Presentations >>
1. Kai KURIHARA, Takahiro KONDOU, Hiroki MORI, Kenichiro MATSUZAKI and Nobuyuki SOWA, Vibration Control of an Overhead Crane by Elimination of the Natural Frequency Component(Robust Approach against Uncertainty in Natural Frequency)
, Asia-Pacific Vibration Conference 2019, 2019.11.
2. Energetic Consideration for the Self Excited Vibration Caused by Time Delay.
3. Pattern Formation Phenomena in Contact Rotating System(Counter-measure Considering an Effect of Diameter Ratio between Two Rubber Rolls).
4. Pattern Formation Phenomena in Contact Rotating System(Analyssi for Nonlinear Viscoelastic Model).
5. Pattern Formation Phenomena in Contact Rotating System(Prevention Method of System with Two Rubber Rolls and its Experimental Verification).
6. Pattern Formation Phenomena in Contact Rotating System(Stability Analysis of System Including Different Time Delays).
7. Prevention Method Using Dynamic Absorbers for Pattern Formation Phenomena (Design Method Considering Structural Modifications).
8. Experimental Verification to Prevention Method Using Dynamic Absorbers for Pattern Formation Phenomena.
9. Experimental Verification of Prevention method Using Dynamic Absorbers for Unstable Vibration Caused by Time Delay Due to Viscoelastic Deformation.
10. Prevention Method Using Dynamic Absorbers for Pattern Formation Phenomena(Experimental Verification to Viscoelastic Multi-degree-of-freedom System)
.
11. Prevention Method Using Dynamic Absorbers for Pattern Formation Phenomena (Effective Design Procedure for Each Mode in Multi-degree-of-freedom System)
.
12. Vibration Characteristics of Nonlinear Time Delay System in Contact Rotating Machinery .
13. Prevention Method Using Dynamic Absorbers for Pattern Formation Phenomena(Design Procedure in Viscoelastic Multi-degree-of-freedom System) .
14. Pattern Formation Phenomena in Contact Rotating Systems(Experimental Verification of Prevention Method for Viscoelastic Model) .
15. Prevention Method using Dynamic Absorbers for Unstable Vibration Caused by Time Delay in Contact Rotating Systems .
16. Vibration Characteristics of Nonlinear Time Delay System.
Membership in Academic Society
  • Japan Sosiety of Mechanical Engineers
Educational
Educational Activities
As for educational activities, I am in charge of student experiments related to mechanical mechanics for third-year undergraduate students in the curriculum of this university. I am also in charge of lectures on mechanics in Mechanical dynamics I for second-year undergraduates and third-year undergraduates, and practices on mechanical dynamics and mechanical vibration. I also supervise undergraduates, master students, and doctoral students in my laboratory.


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