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Design and Performance of a Spatial 6-RRRR Compliant Parallel Nanopositioning Stage.

Ruizhou Wang1, Heng Wu2

  • 1State Key Laboratory of Precision Electronic Manufacturing Technology and Equipment, Guangdong University of Technology, Guangzhou 510006, China.

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|November 11, 2022
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Summary

This study introduces a novel nanopositioning stage (NPS) utilizing piezoelectric actuators (PEAs) and compliant parallel mechanisms (CPMs). The new 6-degrees-of-freedom (6-DOF) design achieves superior mechanical performance for advanced positioning applications.

Keywords:
compliant parallel mechanismsnanopositioning stagespiezoelectric actuators

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Area of Science:

  • Mechanical Engineering
  • Robotics
  • Nanotechnology

Background:

  • Nanopositioning stages (NPSs) require multiple degrees of freedom (multi-DOFs) for advanced applications.
  • Piezoelectric actuators (PEAs) and compliant parallel mechanisms (CPMs) offer advantages for NPS design.

Purpose of the Study:

  • To propose and analyze a novel NPS design integrating PEAs and CPMs for spatial multi-DOF positioning.
  • To enhance fabrication feasibility through a two-in-one structure.

Main Methods:

  • A 6-revolute-revolute-revolute-revolute (RRRR) CPM was designed using six parallel kinematic chains (three in-plane, three out-of-plane).
  • Finite-element modeling (FEM) using compliance-based matrix method (CMM) and pseudo-rigid body model (PRBM) analyzed mechanical performance.
  • Experimental verification of kinematics was performed.

Main Results:

  • The proposed two-in-one 6-RRRR CPM structure demonstrated superior mechanical performance.
  • Simulation results validated the static and dynamic performance of the NPS.
  • Experimental results confirmed the kinematic accuracy of the designed stage.

Conclusions:

  • The developed 6-RRRR NPS, utilizing PEAs and CPMs, represents a significant advancement in spatial multi-DOF positioning technology.
  • The design offers a feasible solution for high-performance nanopositioning applications.