H-infinity Control in the Frequency Domain for a Semi-Active Floor Isolation System
H-infinity Control in the Frequency Domain for a Semi-Active Floor Isolation System
复制标题
半主动地板隔离系统的频域 H 无穷大控制
DOI：
10.1007/s11709-013-0214-x
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发表时间：
2013
期刊：
影响因子：
--
通讯作者：
M
中科院分区：
文献类型：
--
作者：
Shi Y.;Becker;T. C.;Kurata;M.;and Nakashima;M
安装在固定基础结构中的单个楼层或房间中的地板隔离系统旨在保护设备。通过这种配置，从地面运动到地板隔离的输入运动被结构过滤，使得输入运动的大部分频率含量低于结构的主导频率。地板隔震系统应尽量减少加速度以保护设备;然而，位移也必须受到限制，以节省地板空间，特别是在长时间运动的情况下。采用半主动控制与H ∞控制相结合的方法对楼层隔震系统进行控制，并设计了一种新的输入成形滤波器，以考虑输入运动特性，提高H ∞控制的有效性。为了验证H ∞控制的有效性，对采用滚动摆隔震器和磁流变阻尼器的半主动地板隔震系统进行了振动台试验。为了比较，还测试了使用油阻尼器的被动控制。试验结果表明，H ∞控制能有效地减小频率接近结构卓越频率的短周期运动的加速度，也能有效地减小频率接近结构固有频率的长周期运动的位移。H ∞控制算法能够根据不同的运动频率特性调整控制策略，比被动控制具有更大的优势。
A floor isolation system installed in a single floor or room in a fixed base structure is designed to protect equipment. With this configuration, the input motions to the floor isolation from the ground motions are filtered by the structure, leaving the majority of the frequency content of the input motion lower than the predominant frequency of the structure. The floor isolation system should minimize the acceleration to protect equipment; however, displacement must also be limited to save floor space, especially with long period motion. Semi-active control with anH∞control was adopted for the floor isolation system and a new input shaping filter was developed to account for the input motion characteristics and enhance the effectiveness of theH∞control. A series of shake table tests for a semi-active floor isolation system using rolling pendulum isolators and a magnetic-rheological damper were performed to validate theH∞control. Passive control using an oil damper was also tested for comparison. The test results show that theH∞control effectively reduced acceleration for short period motions with frequencies close to the predominant frequency of the structure, as well as effectively reduced displacement for long period motions with frequencies close to the natural frequency of the floor isolation system. TheH∞control algorithm proved to be more advantageous than passive control because of its capacity to adjust control strategies according to the different motion frequency characteristics.