Abstract
According to the magnetic control characteristics of giant magnetostrictive material (GMM), a smart actuator was designed, which can permit an active vibration control of the structure. In this study, the working principle and design method of this actuator were analyzed, and its output performance was tested. Based on the dynamic modeling of the actuators, the actuating control equation was derived for the whole cylindrical reticulated shells. Meanwhile, on the basis of actuating efficiency, the position optimizing criterion independent of control method was presented. In overall considering the coefficient of control effect, hardware cost, system complexity and other factors, the numbers of actuators were determined preliminarily，and then the placements of actuators were optimized using genetic algorithms. Finally, by the use of LQR active control algorithm, the active vibration control was performed on a cylindrical reticulated shell. The analytical results show that the optimal placements of the actuator can efficiently reduce the dynamic response of the structure, and can desirably realize an active vibration control. Additionally, the simulated results of the active control demonstrate the superiority and reliability of application of the genetic algorithm to such problems.
Key words
active vibration control /
giant magnetostrictive material /
actuator /
genetic algorithm /
cylindrical reticulated shells
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Wang She-liang;Tian Xiu-ting;Dai Jian-bo;Zhao Xiang .
Research on optimal placement of the actuator for active vibration control of cylindrical reticulated shells based on controllability[J]. Journal of Vibration and Shock, 2011, 30(9): 50-54
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