Domke J F, Rhee C-H, Liu Z, Wang T D, Oldham K R
Department of Microsystems Engineering, University of Freiburg - IMTEK, Georges-Koehler-Allee 102, 79110 Freiburg, Germany, visiting scholar at the Department of Mechanical Engineering, University of Michigan, 2350 Hayward Ave, Ann Arbor, MI 48109, USA.
J Micromech Microeng. 2011 Jun 1;21(6). doi: 10.1088/0960-1317/21/6/067004. Epub 2011 May 11.
A low-profile, piezoelectrically-driven microactuator is presented that achieves very large stroke lengths within size constraints suitable for certain endoscopic microscopy applications. The actuator utilizes a transmission consisting of lever arm and chevron-beam structures to amplify high-force, low-displacement motion of a ceramic lead-zirconate-titanate (PZT) brick into large displacement of a translational platform. For ±120 V input, a full range of 486 μm of motion is achieved, with natural frequency greater than 500 Hz. This corresponds to an anticipated In addition, the lateral translational platform is supported by a redesign of common folded silicon flexures to provide large transverse and vertical stiffness when the width of the actuator is limited.
本文介绍了一种低剖面、压电驱动的微致动器,该微致动器在适合某些内窥镜显微镜应用的尺寸限制内实现了非常大的行程长度。该致动器利用由杠杆臂和人字形梁结构组成的传动装置,将陶瓷锆钛酸铅(PZT)块的高力、低位移运动放大为平移平台的大位移。对于±120V的输入,可实现486μm的全行程运动,固有频率大于500Hz。此外,横向平移平台由常见的折叠硅挠曲结构重新设计支撑,以便在致动器宽度受限的情况下提供较大的横向和垂直刚度。