局部模态传感器的设计

摘要

With an example of a vibrating beam, this paper presented s new type of shaped PVDF modal sensor whose shape covered only a portion of the beam. The shape of PVDF modal sensor was determined by using Legendre polynomials. This paper presented the numerical calculation results to show the feasibility of this new type modal sensor. Furthermore, it is found that the shape of the PVDF film sensor is independent of the type, magnitude and position of the external excitation.%以振动梁为例,提出在振动粱的局部表面粘贴特定形状的PVDF薄膜作为传感器测量结构的模态坐标,并通过勒让德多项式推导得到所需的PVDF模态传感器的形状函数.数值计算表明这种模态传感器的设计是可行的,并且这种传感器设计方法与振动梁的外激励力性质(如激励力类型、频率以及位置等)无关.