Please use this identifier to cite or link to this item: http://hdl.handle.net/11455/71305
標題: Experiment of an ABS-type control strategy for semi-active friction isolation systems
作者: Lu, L.Y.
Lin, G.L.
Lin, C.Y.
關鍵字: anti-lock braking system
ABS system
shaking table test
seismic
isolation
semi-active control
variable friction damper
piezoelectric
actuator
near-fault earthquake
near-fault earthquakes
seismic structures
structural control
building
complex
dynamic-analysis
dampers
protection
devices
期刊/報告no:: Smart Structures and Systems, Volume 8, Issue 5, Page(s) 501-524.
摘要: Recent studies have discovered that a conventional passive isolation system may suffer from an excessive isolator displacement when subjected to a near-fault earthquake that usually has a long-period velocity pulse waveform. Semi-active isolation using variable friction dampers (VFD), which requires a suitable control law, may provide a solution to this problem. To control the VFD in a semi-active isolation system more efficiently, this paper investigates experimentally the possible use of a control law whose control logic is similar to that of the anti-lock braking systems (ABS) widely used in the automobile industry. This ABS-type controller has the advantages of being simple and easily implemented, because it only requires the measurement of the isolation-layer velocity and does not require system modeling for gain design. Most importantly, it does not interfere with the isolation period, which usually decides the isolation efficiency. In order to verify its feasibility and effectiveness, the ABS-type controller was implemented on a variable-friction isolation system whose slip force is regulated by an embedded piezoelectric actuator, and a seismic simulation test was conducted for this isolation system. The experimental results demonstrate that, as compared to a passive isolation system with various levels of added damping, the semi-active isolation system using the ABS-type controller has the better overall performance when both the far-field and the near-fault earthquakes with different PGA levels are considered.
URI: http://hdl.handle.net/11455/71305
ISSN: 1738-1584
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