智能悬臂梁有效弯矩的理论分析与确定方法

利用压电材料的逆压电效应可将其制成驱动元件，即当对它施加电压时，由于电场的作用造成压电元件变形。智能悬壁梁，如压电驱动器采用对称安装，在极性相反的控制电压作用下，产生纯弯曲控制力矩，通过分析智能梁横载面上的应变分布，推导出由压电驱动器应变产生的有效左的理论计算公式，并给出确定有效弯矩的两种方法。

he Theoretical Analysis and Measurement of the Effective Moment of the Intelligent Cantilever Beam

This paper deals with the problem that the piezoelectric material can be made into driver elements by utilizing its inverse piezoelectric effect-i.e. when voltage is impressed across the material, the deformation of the piezoelectric element will be caused because of the effect of electric field. The intelligent cantilever, if the piezoelectric drivers are fitted symmetrically, will produce the pure bend control moment under the effect of the control voltage with opposite polarities. Through analysis of the strain distribution over the transverse section of the intelligent cantilever beam, the theoretical calculating formula for the effective bending moment caused by piezoelectric driver train is deduced and two methods of measurement of the effective bending moment are presented.