Stabilization of cooperative behavior utilizing disorder in network systems and its control and design

2022 Fiscal Year Final Research Report

• Project/Area Number: 20K19881
• Research Category: Grant-in-Aid for Early-Career Scientists
• Allocation Type: Multi-year Fund
• Review Section: Basic Section 61040:Soft computing-related
• Research Institution: Ibaraki University
• Principal Investigator: Sugitani Yoshiki 茨城大学, 理工学研究科(工学野), 講師 (40780474)
• Project Period (FY): 2020-04-01 – 2023-03-31
• Keywords: 同期現象 / 振動停止現象 / 結合発振器ネットワーク / 結合遅延 / 無秩序

Outline of Final Research Achievements

In this study, we investigate how the occurrence of cooperative behaviors such as synchronization and amplitude death can be affected by the addition of disorder to the oscillator network. In previous studies, the effects of such disorder have not been investigated due to difficulties of analysis. Thus, it was necessary to propose a new analytical method. We proposed a method to analyze the effects of disorder by using the knowledge of complex systems science and control engineering. The analysis yielded interesting results that differ from the intuitive understanding that appropriate disorder promotes the occurrence of cooperative behavior. Furthermore, we investigated in detail the appropriate disorder for the generation of cooperative behavior through numerical simulations and experiments using electronic circuits.

Free Research Field

複雑系科学

Academic Significance and Societal Importance of the Research Achievements

これまでの研究では，解析の容易さから，振動子や相互作用の無秩序性についてあまり考慮されてこなかった．また，無秩序性は，協調動作に悪影響を与えるもの（不要なもの）と考えられてきていた．しかし，本研究の成果は，無秩序性が協調動作の促進をするという，これまでの直感的な理解に反するものであり，学術的に興味深く様々な分野での検討が期待される．また，この成果は，世の中の無秩序性が含まれるシステムの協調動作の解析に役立つほか，工学システムにおいて協調動作をさせるときに，あえて無秩序性を加えるなどの新しい設計指針を与え得る．