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Related Experiment Videos

A simple bidirectional linear microactuator for nanopositioning--the "Baltan" microactuator.

James Friend1, Yasuyuki Gouda, Kentaro Nakamura

  • 1Precision and Intelligence Laboratory, Tokyo Institute of Technology, Midori-ku, Yokohama, Japan 226-8503. jamesfriend@ieee.org

IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control
|July 19, 2006
PubMed
Summary

This study introduces a novel linear microactuator using piezoelectric elements for precise bidirectional motion. The actuator achieves high speeds and forces, with potential for miniaturization in microrobotics.

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Area of Science:

  • Materials Science
  • Mechanical Engineering
  • Robotics

Background:

  • Piezoelectric actuators are crucial for micro-scale motion control.
  • Existing designs often face limitations in speed, force, or miniaturization.

Purpose of the Study:

  • To develop a novel linear microactuator with enhanced performance.
  • To demonstrate bidirectional motion using resonant frequencies.
  • To explore miniaturization potential for microrobotic applications.

Main Methods:

  • Utilized bulk PZT (lead zirconate titanate) and electro-discharge-machined components.
  • Employed a dual-beam design vibrated at distinct resonance frequencies (508 and 522 kHz).
  • Achieved bidirectional linear motion through controlled vibration of piezoelectric elements.

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Main Results:

  • Generated a sliding velocity of 100 mm/s and force of 12 mN (bidirectional).
  • Reached peak velocity of 212 mm/s and force of 44 mN.
  • Demonstrated precise control of sliding distance down to 90 nm +/- 2 nm.

Conclusions:

  • The novel microactuator design offers silent operation and inherent clamping.
  • The design is scalable to sub-mm3 volumes, suitable for microrobotics.
  • Further improvements in control methods can enhance positioning accuracy.