复合材料构件气动载荷响应主动控制技术研究

Active Vibration Control of Composite Structures Induced by Aero-Buffeting Load

飞机由于高频涡流的作用 ,局部复合材料构件承受面外脉动冲击载荷 ,产生累积疲劳损伤 .本文采用 13型压电片粘贴在复合材料构件表面 ,测量构件在交变气动载荷下的应变 ,应用自适应振动前馈控制原理 ,施加电压主动控制压电驱动器的变形 ,实现对复合材料构件的应变驱动 ,从而提高壁板构件的模态阻尼 ,减小动态响应 ,达到减小复合材料构件疲劳损伤的目的 .

One of the aero elastic phenomena associated with composite structure in high performance aircraft is the high frequency vortex induced out of plane buffeting load. The buffeting load can lead to high cyclic strain and stress, and dramatically reduce the fatigue life of composite structures. In this paper, piezoelectric patches are bonded on the surface of composite panel. The response of the structure is measured using bonded piezoelectric sensors. A filtered adaptive controller is used to control the deformation of piezoelectric actuators actively, so as to increase the modal damping coefficient of the panel, suppress the dynamic response and to improve the fatigue performance of the structure. Experimental results indicate that the strain in composite structures can be suppressed effectively.