| 基于形状记忆合金的TMD半主动控制 |
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| 引用本文： | 孙万泉,李庆斌.基于形状记忆合金的TMD半主动控制[J].哈尔滨工业大学学报,2009,41(6):164-168. |
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| 作者姓名： | 孙万泉 李庆斌 |
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| 作者单位： | 孙万泉,SUN Wan-quan(华北电力大学,水电系,北京,102206;清华大学,水沙科学与水利水电工程国家重点实验室,北京,100084);李庆斌,LI Qing-bin(清华大学,水沙科学与水利水电工程国家重点实验室,北京,100084) |
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| 基金项目： | 国家杰出青年科学基金，华北电力大学校博士基金 |
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| 摘 要： | 针对建筑结构在随机荷载或风荷载作用下可能发生的频率不确定问题,特别是结构自振频率会随振幅的大小而发生漂移的非线性振动问题,提出性能可靠、构造简单的形状记忆合金SMA-TMD自适应半主动控制系统.从理论上探讨形状记忆合金在变刚度TMD控制装置中的应用,并进行相应的参数设计.同时,在研究随机荷载作用下TMD系统动力特性的基础上,结合短时傅里叶变换(STFT)设计出该系统的自适应半主动控制算法.算例表明,SMA-TMD自适应控制系统能较好地识别结构系统的时频特性,并进行有效的控制,具有性能可靠和自适应能力强等特点.该自适应控制系统较传统的TMD被动控制减震效果更好,鲁棒性更强.
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| 关 键 词： | 半主动控制 形状记忆合金(SMA) TMD控制 自适应 短时傅里叶变换 建筑结构 |
TMD semi-active control with shape memory alloy |
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| SUN Wan-quan,LI Qing-bin.TMD semi-active control with shape memory alloy[J].Journal of Harbin Institute of Technology,2009,41(6):164-168. |
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| Authors: | SUN Wan-quan LI Qing-bin |
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| Affiliation: | 1. Dept. of Hydraulic and Hydropower Engineering,North China Electric Power University,Beijing 102206,China,2. State Key Laboratory of Hydroscience and Engineering,Tsinghua University,Beijing 100084,China) |
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| Abstract: | In view of the uncertain frequency of building structure vibration caused by random excitation or wind load,a SMA-TMD semi-active adaptive control system with reliable performance and simple structure is presented in this paper. The application of shape memory alloy in the variable stiffness TMD control equipment is investigated theoretically,and corresponding parameters are designed. Based on the study of dynamic characteristics of TMD system,the SMA-TMD adaptive control algorithm is designed by dint of short time Fourier transform. Simulation study indicates that the SMA-TMD system is effective and self-adaptive in identifying the time-frequency characteristic of the structure,and it is more robust and effective in reducing the vibration response compared with traditional TMD control. |
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| Keywords: | semi-active control shape memory alloy(SMA) SMA-TMD control adaptive control short time fourier transform building structure |
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