摘要
建立了一种基于磁流体阻尼器的半主动预测控制策略,该方法基于结构预测模型,根据当前结构状态预测其未来输出,通过优化反映受控对象性能的指标,实现最优控制,并在系统内部自动进行时滞补偿。以一装有2个磁流体阻尼器的5层框架结构为例,分析了不同地震作用下时滞与补偿对控制系统性能的影响,即使滞后时间达到1.0s～2.0s,该系统仍具有很好的控制效果,减小了时滞对控制系统性能的不良影响,保证了控制系统的稳定性和有效性。
A semi-active predictive control （SAPC） scheme with magnetorheological （MR） dampers for reducing the responses of seismically excited structures is developed, which can predict the future multi-step responses of structures according to the current state. The scheme is based on a prediction model of the system response to obtain the optimal control actions by minimizing an object function, which has a function of self-compensation for time delay that occurred in real application. As an example, a 5-story building frame equipped with 2 MR dampers is presented to demonstrate the performance of the proposed SAPC scheme for addressing time delay and reducing the structural responses under different earthquakes. Results indicate that the SAPC strategy can guarantee the stability of the controlled structure and reduce the bad effects of time delay on the controlled system even though the delayed time reach 1.0 to 2.0 seconds.
出处
《工程力学》
EI
CSCD
北大核心
2011年第9期79-83,共5页
Engineering Mechanics
基金
国家自然科学基金重大研究计划重点支持项目(90815025
90715032)
国家自然科学基金面上项目(50808013
51178034)
天津市应用基础与前沿技术研究计划重点项目(09JCZDJC25200)
关键词
预测控制
时滞与补偿
半主动控制
磁流体阻尼器
框架结构
predictive control
time delay and compensation
semi-active control
magnetorheological dampers
frame structure
