基于层叠式平面DE作动器的柔性薄壁结构振动控制研究

Vibration control of flexible thin-walled structure based on laminated planar DE actuator

为了降低单层平面DE作动器的控制电压,提出了一种层叠式平面DE作动器,并开展了基于层叠式平面DE作动器的柔性薄壁结构振动主动控制研究。结合介电弹性体(DE)材料的力电耦合模型,基于哈密顿变分原理,建立了含层叠式平面DE作动器的柔性悬臂梁系统振动控制微分方程。基于比例反馈控制策略,利用不同层数的层叠式平面DE作动器对悬臂梁系统进行了振动主动控制的仿真研究。结果表明,层叠式平面DE作动器对柔性薄壁结构具有良好的振动控制效果,同时相比于单层平面DE作动器,控制所需电压可以降低30%以上,从而为DE作动器的低电压驱动应用提供了一条可行的技术途径。

In order to reduce the control voltage of single-layer planar DE actuator,a laminated planar DE actuator is proposed,and the study on active vibration control of flexible thin-walled structure based on laminated planar DE actuator is carried out.Combining the electromechanical coupling model of DE materials and the Hamilton principle,the differential equation of vibration control for flexible cantilever beam system with laminated planar DE actuator is established.Based on the proportional feedback control strategy,the vibration active control of cantilever beam system using laminated planar DE actuator with different layers is simulated.The results show that the laminated planar DE actuator has good vibration control effects on the flexible thin-walled structures,and the required control voltage can be effectively reduced more than 30%compared with the single-layer planar DE actuator,thus providing a feasible technical approach for the low-voltage driving application of the DE actuator.