| 陈水生.斜拉索振动的模糊半主动控制研究[J].计算力学学报,2006,23(6):733~737 |
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| 斜拉索振动的模糊半主动控制研究 |
| Fuzzy semi-active control of stay cables using magnetorheological dampers |
| 修订日期：2004-10-25 |
| DOI：10.7511/jslx20066137 |
| 中文关键词: 斜拉索 模糊控制 半主动控制 MR阻尼器 |
| 英文关键词:stay-cables,fuzzy control,semi-active,MR damper |
| 基金项目:江西省自然科学基金;江西教育厅科研专项基金;日本九州工业大学校科研和教改项目 |
| 陈水生 |
| 华东交通大学土木建筑学院,江西南昌330013 |
| 摘要点击次数: 1757 |
| 全文下载次数: 20 |
| 中文摘要: |
| 考虑拉索垂度及抗弯刚度的影响，得出了索-阻尼器系统振动偏微分方程；用中心差分法将偏微分方程在空间内离散，导出了系统的面内振动常微分方程组；提出了使用MR阻尼器（Magnetorheological Damper）作为控制设备，模糊集为基础的半主动控制算法，并运用提出的算法对索一阻尼器系统进行了振动控制分析。本文方法的优势在于算法自身的鲁棒性、处理非线性问题的能力强和不需要结构的精确数学模型，算法需要的输入变量少，可以解决实际工程中斜拉索的振动响应信息难以测量的困难。模糊算法的输出直接控制MR阻尼器的输入电压。与LQR-Clipped算法不同，MR阻尼器的输入电压可以是零与最大值之间的任意值。本文以实际斜拉桥拉索为例。分析了拉索的振动控制效果，结果表明本文提出的模糊半主动控制算法，使MR阻尼器的功能得到了更好的发挥，比MR被动控制效果好，且可以减小控制力。 |
| 英文摘要: |
| Taking the bending stiffness and static sag into consideration,the space nonlinear vibration partical differential equations are derived.The equations are discretized in space by finite center difference approximation,then the nonlinear differential equations are obtained for the in-plane vibration of the cables-dampers system.A semi-active control strategy,the MR(Magnetorheological Dampers) dampers are used as actuators,is presented based on the fuzzy set theory.And a vibration control of the cables-dampers system is analyzed by the proposed strategy.The proposed method has some advantage of inherent robustness,and easy to handle the nonlinear characteristics of the structure,because there is no longer the needs for an exact mathematical model of the structure,and needs to know a few input variables from the vibration sensors,which will deal with the difficulty of testing response information of the structure vibration.The output of the present method is directly inputed to the MR dampers as input voltage,and the fuzzy logical controller can be easiby evaluated in the real civil engineering structure.Compared with the LQR-Clipped method,in which the MR dampers' voltage only can be Zero or Maximum,the present method can make desired voltage value for MR dampers.As numerical examples,the practical cables are analyzed for freedom vibration.The research results demonstrate that the present method can get better effectiveness than both passive off control and passive on control,and almost the same effectiveness as LQR-Clipped strategy.However,smaller control force is needed in the present method than the LQR-Clipped method.It means that the proposed strategy can promote efficiency of the MR Dampers. |
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