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首页> 外文期刊>Bulletin of earthquake engineering >Structural vibration reduction using self-tuning fuzzy control of magnetorheological dampers
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Structural vibration reduction using self-tuning fuzzy control of magnetorheological dampers

机译：基于磁流变阻尼器自调整模糊控制的结构减振

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Among the control devices considered for dissipating seismic energy and reducing structural vibrations is the magnetorheological (MR) damper which consists of a hydraulic cylinder filled with a suspension of micron-sized, magnetically polarizable iron particles capable of reversibly changing from free-flowing, linear viscous fluid to semi-solid with the application of a magnetic field. Several algorithms have been proposed for regulating the amount of damping provided by MR dampers. An attractive option is the use of fuzzy controllers because they are simple, intrinsically robust, and they do not depend on a model of the system. Tuning of these controllers, however, has shown to be a difficult task because of the large number of parameters involved. This paper proposes a self-tuning fuzzy controller to regulate MR dampers' properties and reduce structural responses of single degree-of-freedom seismically excited structures. Robustness to changes in seismic motions and structural characteristics was assessed by subjecting a rigid and a flexible building to different earthquake records. Results show that the self-tuning controller proposed effectively reduced responses of both structures to all earthquakes considered. In addition, results were compared to those of a fuzzy controller with constant scaling factors and to those of two passive strategies: "passive on" and "passive off", where the current to the MR dampers was set to its maximum allowable value, and zero, respectively.
机译：在用于消散地震能量并减少结构振动的控制装置中，磁流变（MR）阻尼器由一个液压缸组成，该液压缸装有一个微米级的，可磁极化的铁颗粒悬浮液，能够从自由流动的线性粘性中逆转而来。在磁场作用下流体从半固态转变为半固态。已经提出了几种算法来调节由MR阻尼器提供的阻尼量。一个有吸引力的选择是使用模糊控制器，因为它们简单，本质上稳定并且不依赖于系统模型。但是，由于涉及大量参数，对这些控制器进行调整已显示为一项艰巨的任务。本文提出了一种自整定模糊控制器，以调节MR阻尼器的性能并降低单自由度地震激励结构的结构响应。通过使刚性和柔性建筑物经受不同的地震记录来评估地震运动和结构特征变化的稳健性。结果表明，自整定控制器提出了有效降低两种结构对所考虑的所有地震的响应的方法。此外，将结果与具有恒定比例因子的模糊控制器的结果以及两种无源策略的结果进行比较：“无源接通”和“无源断开”，其中流向MR阻尼器的电流设置为其最大允许值，以及分别为零。

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