Stable method for generation of a vibration-free state using wave-guidance, wave-blocking and energy-trapping control

2019 Fiscal Year Final Research Report

• Project/Area Number: 16K06161
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Dynamics/Control
• Research Institution: Seikei University
• Principal Investigator: Iwamoto Hiroyuki 成蹊大学, 理工学部, 准教授 (90404938)
• Co-Investigator(Kenkyū-buntansha): 田中 信雄 成蹊大学, 理工学部, 客員研究員 (70305423) ; 西郷 宗玄 成蹊大学, 理工学部, 客員研究員 (80357053)
• Project Period (FY): 2016-04-01 – 2020-03-31
• Keywords: 波動制御 / 波動フィルタ / エネルギトラッピング制御

Outline of Final Research Achievements

By combining the wave filtering method that measures amplitudes of the wave propagating for a specific direction and the wave control method that reduces the specific wave propagation, the wave valve was established that allows the wave propagation for only one direction. Furthermore, the energy trapping control was presented that confines disturbance energy within the designated region by using two wave valves arranged to face each other. Based on this method, it is possible to generate a vibration-free state in a vibration-unacceptable region and to avoid the new resonances in a wide region of the target structure.

Free Research Field

機械力学，音響工学，制御工学

Academic Significance and Societal Importance of the Research Achievements

従来の波動制御法においては，構造物中に無振動状態を生成したとしても，非制御領域において新たな共振現象が発生してしまい，安定性に問題があった．そこで，構造物中の限られた領域に外乱エネルギを封じ込めることにより問題を解決した．能動振動・音響制御分野において，エネルギの封じ込めという概念に依拠した手法はほとんど存在せず，学術的な意義は大きいと考える．