摘要
作为最近发展起来的高性能半主动控制装置,磁流变阻尼器通过改变磁场强度来调节控制力,可靠度高,体积小,出力大,并且具有Fail-Safe的特点,是一种具有广泛应用前景的新型结构控制装置。本文主要研究结构非线性振动的磁流变阻尼半主动控制。首先采用我们提出的自适应模糊滑模控制(AFSMC)算法得到了结构非线性振动的主动控制力,然后参照主动控制力,提出和仿真实现了结构非线性振动的磁流变阻尼半主动控制。最后,针对3层和20层benchm ark非线性模型,每层均设置一个磁流变阻尼器,对在给定的地震动下的结构响应进行了计算,分析了半主动控制跟踪主动控制的效果,并且对于半主动控制下的结构位移响应、加速度响应等各项指标也进行了对比分析。仿真结果表明,由于自适应模糊滑模控制算法与半主动控制算法相结合可以很好地实现结构非线性振动的半主动控制,所以能够得到令人满意的控制结果。
Magnetorheological （MR） dampers are new semi..active control devices in which the damping forces are controlled by magnetic field. Besides its lower-power requirement, the MR damper is reliable, Fail-Safe, and relatively inexpensive. In this paper, the semi-active control is applied to the nonlinear structure through the MR damper. At first, the active control force is computed by the adaptive fuzzy sliding-mode control algorithm. Secondly, considering the possibility that the MR damper can carry out the active force, the simulation is made on the 3-story frame model and 20-story frame model, which is referred to as the third generation benchmark model. The control force is applied to each floor through MR damper. It is emphasized that the semi-active control force offered by the MR fluid damper can control the damping force and make itself follow the active control force. The seismic responses of the nonlinear structure are also analyzed. The resuh shows that because the adaptive fuzzy sliding-mode control algorithm is very suitable for semi-active control, the control effect is satisfied.
出处
《地震工程与工程振动》
CSCD
北大核心
2006年第2期96-103,共8页
Earthquake Engineering and Engineering Dynamics
基金
国家自然科学基金重点项目(50038010)
国家863计划项目(2001AA602015)
