悬臂Kagome夹心板独立模态空间振动控制研究

针对悬臂板挠度大、低频振动突出问题,对悬臂Kagome夹心板的振动主动控制进行研究。建立结构及压电作动器有限元模型;将独立模态空间控制与模态观测器相结合,提出悬臂Kagome夹心板的主动控制策略;针对突风载荷作用下夹心板基于独立模态空间的振动控制进行仿真,重点研究观测器极点对控制效果影响。结果表明,所提控制方法能显著提高悬臂Kagome夹心板结构的阻尼特性,观测器衰减系数越大控制效果越好;该夹心板在振动控制方面较传统板结构优势明显。

Independent modal space vibration control of cantilever Kagome sandwich plate

Cantilever plate is a common kind of structure in aerospace field. Due to its large deflection, low-frequency vibration problem is relatively serious. Active vibration of a kind of cantilever Kagome sandwich plate is studied here. First, the finite element models of the cantilever structure and piezoelectric actuator are established. Then the active control strategy of cantilever Kagome sandwich plate is proposed by combining independent modal space control with modal observer. And, aiming at one kind of gust load, the independent modal space control of Kagome sandwich plate is simulated, while focus is on the influence of observer poles on the control effect. The results show that this control method can significantly improve the damping properties, while greater attenuation factor of the observer can get better control effect. Therefore, Kagome sandwich panels has obvious advantages over traditional board structure in vibration control aspect.