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Postural Organization of Gait Initiation for Biomechanical Analysis Using Force Platform Recordings

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Published on: July 26, 2022

Motion and Load Analysis of the Flexible Platform Based on Noncontact Processing.

Chao Lin¹, Mingdong Jiang¹, Ping Xu²

¹State Key Laboratory of Mechanical Transmission, Chongqing University, Chongqing 400030, China.

|July 27, 2022

Summary

This study analyzes flexible hinge positioning stages for noncontact machining. The research confirms that coupled displacements are nanoscale, meeting micron-level machining accuracy requirements.

Keywords:

compliant mechanism coupled displacement motion trajectory noncontact processing stiffness

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Area of Science:

Mechanical Engineering
Precision Engineering

Background:

Noncontact processing requires highly accurate positioning stages.
Flexible hinge mechanisms offer potential for precise motion control.

Purpose of the Study:

To investigate the applicability of flexible hinge-based positioning stages for noncontact processing.
To analyze coupled displacements and performance variations under external loads.

Main Methods:

Applied Hooke's law, Euler-Bernoulli beam theory, and geometric analysis.
Developed coupled-displacement and external-load matrices.
Derived platform displacement expression for noncontact machining.
Utilized finite element analysis (FEA) and experimental validation.

Main Results:

Coupled displacements in X and Y directions are nanoscale.
Z-direction coupled displacement due to external load is nanoscale.
Displacements are approximately one-thousandth of the output, meeting micron-level tracking accuracy.

Conclusions:

The flexible hinge positioning stage is suitable for noncontact processing.
Theoretical analysis is validated by FEA and experimental results.
The stage achieves the required tracking accuracy for precision machining.