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Damped two-axis axially collocated flexure hinge.

Zhong Chen1, Junjie Shi1, Kui Wang2

  • 1School of Automotive and Mechanical Engineering, South China University of Technology, Guangzhou, Guangdong 510641, China.

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|October 20, 2023
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Summary
This summary is machine-generated.

This study introduces a damped two-axis axially collocated (2-AC) flexure hinge with hybrid inserts to enhance motion control. Experiments confirm improved damping performance, crucial for precision stages.

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Area of Science:

  • Mechanical Engineering
  • Materials Science
  • Vibration Control

Background:

  • Flexure-based stages require passive damping for enhanced broadband motion control.
  • Existing flexure hinges often lack sufficient damping capabilities, limiting performance in dynamic applications.

Purpose of the Study:

  • To develop and analyze a novel damped two-axis axially collocated (2-AC) flexure hinge.
  • To investigate the damping enhancement provided by hybrid inserts within the flexure hinge.
  • To establish an analytical model for the loss factor of the damped flexure hinge.

Main Methods:

  • Development of a 2-AC flexure hinge incorporating damping-enabling hybrid inserts.
  • Analytical derivation of the loss factor model using hybrid compliance and shearing damping models.
  • Verification of the analytical model through finite element analysis (FEA).
  • Experimental validation of the damping performance improvement.

Main Results:

  • The analytical loss factor model was derived and verified by FEA.
  • Geometric parameters of the hybrid insert (diameter, slope angle) significantly influence the hinge's loss factor, particularly at low frequencies and resonance.
  • Embedding hybrid inserts demonstrably improved the damping performance of the 2-AC flexure hinge.

Conclusions:

  • The developed damped 2-AC flexure hinge with hybrid inserts effectively enhances damping.
  • The analytical model provides a reliable method for predicting damping performance.
  • This technology offers a viable solution for improving motion control in precision stages.