基于柔性铰链结构的大口径压电快摆镜  

Large Aperture Piezoelectric Fast Pendulum Mirror Based on Flexible Hinge Structure

作　　者：王强[1] 时运来[1] 孙海超 李兴 刘伟[1] WANG Qiang;SHI Yunlai;SUN Haichao;LI Xing;LIU Wei(State Key Lab.of Mechanics and Control for Aerospace Structures,Nanjing University of Aeronautics and Astronautics,Nanjing 210016,China)

机构地区：[1]南京航空航天大学航空航天结构力学及控制全国重点实验室,江苏南京210016

出　　处：《压电与声光》2024年第1期73-78,共6页Piezoelectrics & Acoustooptics

基　　金：国家自然科学基金面上资助项目(No.51975282)。

摘　　要：为了解决压电作动器驱动的快速反射镜因压电作动器伸长量较小,导致快速反射镜偏转角过小的问题,该文提出了一款新型快速反射镜设计方案。采用三级杠杆式柔性铰链放大机构实现压电作动器位移的放大,采用柔性轴承作为快摆镜的运动关节实现快摆镜的大角度定轴偏转。通过理论推导和有限元仿真对快摆镜的最大偏转角度、等效应力、谐振频率以及振型进行分析。实验结果表明,所设计的快摆镜可以实现大于2 mrad的镜面偏转,满足大范围、高精度的光束定位要求。In order to solve the problem of small deflection angle of the fast reflector driven by piezoelectric actuator having a small elongation,a new design scheme for the fast reflector is proposed in this paper.A three-level lever type flexible hinge amplification mechanism is used to amplify the displacement of the piezoelectric actuator,and a flexible bearing is used as the motion joint to achieve large angle fixed axis deflection of the fast pendulum mirror.The r theoretical derivation and finite element simulation are used to analyze the maximum deflection angle,equivalent stress,resonant frequency and vibration mode of the fast swing mirror.The experimental results show that the designed fast pendulum mirror can achieve mirror deflection of greater than 2mrad,meeting the requirements of wide range and high-precision beam positioning.

关 键 词：柔性铰链 逆压电效应 压电作动器 大口径压电快摆镜 位移放大机构 

分 类 号：TN384[电子电信—物理电子学]