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Title: Control of wind-excited towers by active tuned liquid column damper
Authors: Balendra, T. 
Wang, C.M. 
Yan, N.
Keywords: Active tuned liquid column damper
Optimal control technique
Wind-excited vibration
Issue Date: Sep-2001
Citation: Balendra, T., Wang, C.M., Yan, N. (2001-09). Control of wind-excited towers by active tuned liquid column damper. Engineering Structures 23 (9) : 1054-1067. ScholarBank@NUS Repository.
Abstract: An active control system involving a tuned liquid column damper (TLCD) is developed for the vibration control of a single-degree-of-freedom tower subjected to wind excitation. This new control system will be referred to as the active tuned liquid column damper (ATLCD) system. It is found that the wind-induced response of the tower can be reduced substantially by the ATLCD system. The most efficient type of sensor is found to be the acceleration sensor when compared with displacement- and velocity-type sensors. To assess the effectiveness of such a control system, a comparison study is made between the ATLCD and the active-passive tuned mass damper (APTMD). In seeking the optimal control parameters for both systems, the norm of the root-mean-square of the system output under actual wind excitation, ∥H∥rms, is adopted as the objective function instead of the commonly used ∥H∥2 (i.e., the norm of the system output under a unit white noise). The results show that the proposed ATLCD system is a good alternative to the APTMD system. Considering the potential advantages of the liquid column damper, the ATLCD system may be a better choice for vibration control of wind-induced towers. ©2001 Elsevier Science Ltd. All rights reserved.
Source Title: Engineering Structures
ISSN: 01410296
DOI: 10.1016/S0141-0296(01)00015-3
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