压电陶瓷驱动器杠杆式柔性铰链机构放大率计算方法

在精密微位移领域,杠杆式柔性铰链机构常被用来放大压电陶瓷驱动器产生的微小位移。在考虑柔性铰链转动中心偏移量的基础上,推导出杠杆式柔性铰链机构放大率计算公式,并采用有限元分析和实验测试进行验证。通过公式计算、有限元仿真分析和实验测试得到的放大率分别为8.31、8.38和8.20,有限元仿真值和公式计算值之间的误差为1％,实验测试值和公式计算值之间的误差为1.3％,证明了计算公式的正确性。

Calculation Method of Magnification Ratio for Lever-type Flexure Hinge Mechanism Driven by Piezoactuator

Lever-type flexure hinge mechanism was usually used to amplify the tiny displacement produced by piezoactuator in the field of precision micro-displacement. The calculation formula of the magnification ratio for lever-type flexure hinge mechanism was deduced by considering the deviation of the rotation center of flexure hinge and it was verified by using the finite element analysis and experiment. The magnification ratios, which were obtained from the formula calculation, the FEM simulation analysis and experimental test, were 8.31, 8.38 and 8.20, respectively. The error between the FEM simulation value and the calculation value was 1% and the error between the FEM simulation value and the calculation value was 1.3%. Therefore, the correctness of the calculation formula was proved.