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首先基于新型超磁致伸缩材料(GMM)设计了一种新型作动器,并对其进行了试验研究,获得了其本构方程.利用结构振动模态方程提出了遗传优化算法中的主要参数——优化性能指标;利用MATLB所提供的遗传算法工具箱并结合前述结论确定了作动器最优布置位置.最后利用所编制的LQR主动控制程序对一平板网架结构进行了不布置及随机布置与优化布置该作动器下的地震响应对比分析.结果表明:优化布置该新型作动器后结构地震响应明显减弱,从而验证了该新型作动器在结构主动控制中应用的有效性及遗传优化算法对于此类问题进行研究的可行性.
First, a new kind of actuator is designed based on a new type of giant magnetostrictive material (GMM), and its constitutive equation is obtained through experimental research. The main parameters of the genetic algorithm are proposed by using structural vibration mode equations - Optimize the performance index.Using the genetic algorithm toolbox provided by MATLB and the above conclusions to determine the optimal placement of the actuator.Lastly, the LQR active control program was prepared for a flat grid structure is not arranged and random The results show that the seismic response of the structure is obviously weakened after the new actuator is optimized, and the effectiveness of the new actuator in the active control of the structure is verified. Furthermore, The feasibility of using genetic algorithm to study this kind of problem.