摘要
以简支板为例,利用压电式传感器测量声辐射模态。通过在板表面均匀粘贴一组相同形状的矩形高分子压电薄膜(PVDF),然后通过设计这组PVDF输出的加权系数,得到各阶声辐射模态的伴随系数。研究表明这种传感器策略与辐射体表面上的外激励力性质(如激励力类型、频率以及位置等)无关。该文以压电陶瓷(PZT)作为作动器,通过数值计算分析了这种传感器策略的控制效果。
Based on the radiation modes,it is presented a piezoelectric sensor strategy with an example of simply supported rectangular panel.Radiation mode sensor is created from an array of rectangular segments of piezoelectric film.The outputs of the segments are multiplied by appropriate gains so that the weighted combinations of the outputs approximate the adjoint coefficient of the radiation modes.It is shown that this sensor strategy is independent of the type,magnitude and position of the external excitation.Optimal control simulations are performed to validate this sensor strategy using PZT actuators as control forces.
出处
《压电与声光》
CSCD
北大核心
2003年第2期112-117,共6页
Piezoelectrics & Acoustooptics
基金
江苏省汽车工程重点实验室开放课题基金(KJS01088):
关键词
声辐射模态
结构声有源控制
压电式传感器
radiation modes
active structural acoustic control
piezoelectric sensors
