2023 Fiscal Year Final Research Report
Development of thermoacoustic system simulator based on steady-state oscillation control
| Project/Area Number |
21K04105
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Multi-year Fund |
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| Section | 一般 |
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| Review Section |
Basic Section 21040:Control and system engineering-related
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| Research Institution | Nagaoka University of Technology |
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Principal Investigator |
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| Project Period (FY) |
2021-04-01 – 2024-03-31
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| Keywords | 定常発振制御 / ロバスト制御 / H∞制御系設計 / 模擬管路部 / 進行波音場制御 / 周波数応答関数行列計測手法 |
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| Outline of Final Research Achievements |
Development of simulated tubes: for SISO system where the connected tube to the high temperature side of the thermoacoustic core is included as core section, controller design method is proposed by reducing it to the H infinity control system design where the error between the target tube and simulated one is minimized. It is experimentally demonstrated that thermoacoustic engine combined with the core and tubes can roughly reproduce the actual oscillation condition observed with the actual engine.
Development of a frequency response measurement control method for core: The closed-loop stability of the steady-state oscillation control system is theoretically analyzed with simple resonance model, then an estimation method of oscillation condition is developed based on the measured frequency response function matrix of the core by maintaining one side of the core to be traveling wave sound field and the pressure amplitude to be the target value, using the steady-state oscillation control.
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| Free Research Field |
制御工学
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| Academic Significance and Societal Importance of the Research Achievements |
熱音響システムに関する研究は応用物理学的なものがほとんどで、物理モデルの誤差を考慮した研究は少ない。本研究成果は、モデル化が困難な場合でもその周波数応答計測に基づいてシステム全体の発振予測を可能とするもので、熱音響システムの実用可能性を高める社会的意義がある。
制御工学の応用において振動現象は通常抑制対象であり、熱音響システムや振動発電など共振の維持・促進への応用はほとんどない。定常発振制御系の安定性に理論的保証を与えることは、この点で制御工学分野の発展に貢献する学術的意義がある。
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