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该文提出了基于位移反馈的MR阻尼器对拉索振动的自适应控制算法。采用非线性有限元数值仿真方法分析了在外加简谐激励强迫振动条件下MR阻尼器对拉索自适应半主动控制的效果。将半主动控制效果与MR阻尼器、粘性油阻尼器分别对拉索实施最优被动控制的效果进行了比较。研究结果表明:在相同的外激励条件下,自适应控制算法参数的最终优化值不受初始值的影响;自适应控制时拉索稳态振动的最大动能和位移幅值显著小于MR阻尼器或油阻尼器最优被动控制时拉索相应的值。
In this paper, an adaptive control algorithm of MR damper based on displacement feedback to cable vibration is proposed. The nonlinear finite element numerical simulation method is used to analyze the effect of MR damper on cable adaptive semi-active control under simple harmonic excitation forced vibration. The effect of semi-active control is compared with that of MR damper and viscous oil damper on the optimal passive control of the cable respectively. The results show that under the same external excitation conditions, the final optimization parameters of the adaptive control algorithm are not affected by the initial values; the maximum kinetic energy and displacement amplitude of the steady vibration of the cable are significantly smaller than those of the MR damper or the adaptive damper Oil damper optimal passive control of the corresponding value of the cable.