Dynamic experiment and modeling of squeeze mode smart damper for semi-active control of civil structures

2006 ◽  
Author(s):  
Gwanghee Heo ◽  
Giu Lee ◽  
Joon-Ryong Jeon ◽  
WooSang Lee
Keyword(s):  
Active Control ◽  
Dynamic Experiment ◽  
Civil Structures

scholarly journals Testing and isolation strategies for the vibrational hazards

2019 ◽  
Vol 39 (2) ◽  
pp. 124-131
Author(s):  
Huang Wei ◽  
Xu Jian ◽  
Zhang Tong-yi ◽  
Hu Ming-yi ◽  
Qin Jing-wei ◽  
...  
Keyword(s):  
Active Control ◽  
Control Strategies ◽  
Green Building ◽  
Power Equipment ◽  
Civil Structures ◽  
Severe Problem ◽  
Ground Floor ◽  
Initial Design ◽  
The Future ◽  
Water Pumps

In this paper, a test for investigating the vibrational hazards occurred in a modernized hospital was carried out, in which a lot of power equipment such as chilled water pumps and freezers, etc. were installed in the ground floor. The generated vibrations could be experienced on the upper floors including some medical precision room. Next, solation and active control strategies were proposed, and evidently the active control could improve the suppression a lot. This study illustrated that the great vibrational hazards could not be ignored anymore, and the followed resolution strategies for eliminating these vibrations seemed to be urgent. In tradition, the vibration isolations would not be involved in initial design for civil structures, but in fact this might lead to a severe problem to be addressed in the future, and this study could give inspiration for green building.

Semi-Active Control of Civil Structures With a One-Step-Ahead Prediction of the Seismic Response

2009 ◽  
Author(s):  
Kazuhiko Hiramoto ◽  
Taichi Matsuoka ◽  
Katsuaki Sunakoda ◽  
Akira Fukukita ◽  
Issei Yamazaki
Keyword(s):  
Seismic Response ◽  
Active Control ◽  
Passive Control ◽  
Inertial Force ◽  
Damping Coefficient ◽  
Superior Performance ◽  
Damping Force ◽  
Civil Structures ◽  
One Step ◽  
Command Signal

We propose a semi-active control of civil structures based on a one-step-ahead prediction of the seismic response. The vibration control device (VCD), which has been developed by authors, generates two types of resistance forces, i.e., a damping force proportional to the relative velocity and an inertial force proportional to the relative acceleration between two stories. The damping coefficient of the VCD can be changed with a command signal to an electric circuit connected to the VCD. In the present paper the command signal for changing the damping coefficient of each VCD is assumed to take two values, i.e., the command to take the maximum or minimum damping coefficient. The optimal command signal is selected from all candidates of command signals so that the Euclidean norm of the one-step-ahead predicted seismic response is minimized. As an example a semi-active control of a fifteen-story building with three VCDs is considered. The simulation results show that the proposed semi-active control achieves superior performance on vibration suppression compared with a passive control case where the damping coefficient of each VCD is fixed at its maximum value.

scholarly journals Integrated Design of Structural and Semi-Active Control Systems for Civil Structures(Dynamics & Design Conference 2009)

2010 ◽  
Vol 76 (765) ◽  
pp. 1193-1200
Author(s):  
Kazuhiko HIRAMOTO ◽  
Taichi MATSUOKA ◽  
Katsuaki SUNAKODA ◽  
Akira FUKUKITA ◽  
Issei YAMAZAKI
Keyword(s):  
Control Systems ◽  
Active Control ◽  
Integrated Design ◽  
Special Issue ◽  
Civil Structures
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