2023 Fiscal Year Final Research Report

Resilient Vibration Control Method Considering Functional Continuity and Rapid Restoration

Research Project

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Project/Area Number	20H02301
Research Category	Grant-in-Aid for Scientific Research (B)
Allocation Type	Single-year Grants
Section	一般
Review Section	Basic Section 23010:Building structures and materials-related
Research Institution	Keio University
Principal Investigator	Kohiyama Masayuki 慶應義塾大学, 理工学部(矢上), 教授 (10333577)
Co-Investigator(Kenkyū-buntansha)	西宏章慶應義塾大学, 理工学部(矢上), 教授 (00365470) 高橋正樹慶應義塾大学, 理工学部(矢上), 教授 (10398638)
Project Period (FY)	2020-04-01 – 2024-03-31
Keywords	制震 / 協調制御 / 事業継続 / レジリエンス / 設備
Outline of Final Research Achievements	A control system design method to improve resilience performance was developed for medical facilities. Fragility curves and a probability model of recovery time were developed based on information on earthquake damage and recovery of equipment. We proposed a control system design method that searches for LQR control parameters to maximize resilience performance using the recovery curve, which represents the time evolution of facility functionality against assumed earthquake motion, and verified the effectiveness of the method. We also developed a warm standby method for data centers, which predicts the earthquake response of servers and migrates virtual machines to the standby system based on the probability of exceeding the threshold value to maintain the functionality. In addition, we developed a seismic control system that enhances resilience performance by utilizing an elevated water tank as a sloshing damper, which is a bottleneck for functional maintenance and early recovery.
Free Research Field	地震工学
Academic Significance and Societal Importance of the Research Achievements	これまで、土木・建築・機械構造物の地震対策技術としてアクティブ・セミアクティブ制御の研究は広く行われているが、地震後の復旧のフェーズまで視野に入れて制御系の設計を行っているものは存在しなかった。そのような背景のもと、本研究は建築・機械の構造振動制御分野と情報・通信技術分野の研究者が連携して、機能維持から復旧まで総合的なレジリエンス性能の向上を目指し構造制御を行う制御手法や情報システム、制震装置の開発に取り組んだ。新規性・独創性が高く、新たな地震防災技術を切り拓いたと考えられる。