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WPT-Based Modal Control on Distributed Structures with MRF-04K Damper

ISSN号：1006-4982
期刊名称：《天津大学学报：英文版》
时间：0
分类：TP393.08[自动化与计算机技术—计算机应用技术;自动化与计算机技术—计算机科学与技术] TU352.11[建筑科学—结构工程]
作者机构：[1]School of Civil Engineering, Fuzhou University, Fuzhou 350108, China, [2]School of Civil Engineering, Tianjin University, Tianjin 300072, China
相关基金：Supported by National Natural Science Foundation of China （No, 51108089, No. 90715034 and No. 90715032） and National Natural Science Foundation of Fujian Province （No. 2011J05128）.

作者： LIN Wei[1], LI Zhongxian[2], ZHANG Genming[1], HUANG Pengyun[1]

关键词：分布式结构, 流体阻尼器, 模态控制, WPT, MRF, 半主动控制系统, 控制器, 小波包变换, distributed structure, modal control, semiactive control, wavelet packet transform, magnetorheological （MR） damper, Kalman-filter

中文摘要：

基于阻尼的 semiactive 控制系统收到了的 magnetorheological (先生) 液体为保护结构免于象强烈地震和高度那样的自然危险的可观的注意弯屈。在这份报纸，用小浪包变换(WPT ) 的一个新奇形式的控制器为分布式的结构的颤动控制被建议。在建议控制系统， WPT 方法被利用分解加速测量并且选择作为主导的模式包含大多数 WPT 精力部件的模式。然后，一个形式的控制器被设计控制主导的模式，最佳的活跃控制力量被解决。最后，片断最佳的控制法律被采用决定电压适用于每位先生更潮湿。一个 Kalman 过滤器观察员，从本地加速表反馈估计全部的控制形式的状态，为显示控制器对有自由的很多度的分布式的结构更适用被设计。体育场房顶结构的一个数字例子与 MRF-04K 安装了更潮湿被介绍。控制器的有效性在天津和 El Centro 地震刺激下面被评估。为万用的装载条件的控制器的优异表演和适应性与传统的截断的形式的控制器通过比较被表明。

英文摘要：

The magnetorheological （MR） fluid damper-based semiactive control systems have received considerable attention for protecting structures against natural hazards such as strong earthquakes and high winds. In this paper, a novel modal controller using wavelet packet transform （WPT） is proposed for the vibration control of distributed structures. In the proposed control system, the WPT method is utilized to decompose the acceleration measurement and select the modes containing most of the WPT energy component as the dominant modes. Then, a modal controller is designed to control the dominant modes and the optimal active control force is solved. Finally, Clipped-optimal con- trol law is adopted to determine the voltage applied to each MR damper. A Kalman-filter observer, which estimates the full controlled modal states from local accelerometer feedbacks, is designed for rendering the controller to be more applicable to distributed structures with a large number of degrees of freedom. A numerical example of a stadium root structure installed with MRF-04K damper is presented. The effectiveness of the controller is evaluated under both Tianjin and E1 Centro earthquake excitations. The superior performance and adaptability of the controller for versatile loading conditions are demonstrated through the comparison with traditional truncated modal controller.

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