Development of feed-forward control system for buildings against long-period ground motions

2016 Fiscal Year Final Research Report

• Project/Area Number: 25420604
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Building structures/Materials
• Research Institution: Taisei Technology Center, Taisei Corporation.
• Principal Investigator: Nagashima Ichiro 大成建設株式会社技術センター, その他部局等, 所長 (10374042)
• Co-Investigator(Renkei-kenkyūsha): MASEKI RYOTA 大成建設株式会社, 技術センター・建築技術研究所・防災研究室, 課長 (40374045) ; ISHIKAWA YOSHIYUKI 大成建設株式会社, 技術センター・建築技術研究所・防災研究室 (70810729)
• Project Period (FY): 2013-04-01 – 2017-03-31
• Keywords: アクティブ制御 / フィードフォワード制御 / マスダンパー / 免震 / 長周期地震動 / 共振

Outline of Final Research Achievements

To counteract the resonant response of super high-rise buildings or base-isolated buildings to long-period ground motions, a new active tuned mass damper (ATMD) and an active base-isolation system (ABS) with optimal feedback and feed-forward control (FBFFC) are studied.
It is made clear that a proposed ATMD effectively reduces the resonant response; performance is far better than an ordinary TMD. Feed-forward control forces are calculated using predictions of ground motions over a limited-duration. Two approaches of the feed-forward control are studied for an ABS. The one is FBFFC derived as the optimal control problem formulated using absolute coordinate system. The other is ‘input cancellation control’ (ICC) that cancels the absolute displacement of a base-isolated building at every moment. It was found that the ICC is obtained as the limit of the FBFFC. Based on these findings, a new control algorithm that combines the Feedback control and the ICC are presented.

Free Research Field

地震工学