科研之友
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摘要
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 brick into large displacement of a translational platform. For +/- 120 V input, a full range of 486 mu m of motion is achieved, with natural frequency greater than 500 Hz. This corresponds to the anticipated value found analytically and by simulation. 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.
- 出版日期2011-6
