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An Adaptive Bioinspired Foot Mechanism Based on Tensegrity Structures.

Jianwei Sun1,2, Guangsheng Song1, Jinkui Chu3

  • 1School of Mechanical Engineering, Changchun University of Technology, Changchun City, China.

Soft Robotics
|August 16, 2019
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Summary

This study introduces a novel tensegrity-based robotic foot for adaptive locomotion on complex terrain. The bioinspired design mimics human foot mechanics, demonstrating excellent stability and adaptability in unstructured environments.

Keywords:
adaptive locomotionsbioinspired designbioinspired foot mechanismhuman foot locomotion mechanismtensegrity structure

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Area of Science:

  • Robotics and Bionics
  • Mechanical Engineering
  • Materials Science

Background:

  • Traditional robotic feet struggle with adaptive locomotion on uneven surfaces.
  • Tensegrity structures offer inherent deformability, environmental adaptability, and impact resistance, making them promising for robotic locomotion.

Purpose of the Study:

  • To develop a bioinspired robotic foot mechanism using tensegrity structures for enhanced adaptive locomotion.
  • To validate the proposed design through theoretical analysis, simulation, and physical prototyping.

Main Methods:

  • Established a structural mapping model of a tetrahedral mast tensegrity structure based on human foot morphology.
  • Developed an adaptive foot mechanism using bioinspired design principles and performed theoretical calculations for kinematic behavior and spring stiffness matching.
  • Utilized ADAMS software for simulating locomotion and inverse kinematics for kinematic solutions.
  • Manufactured a 3D-printed physical prototype for experimental verification.

Main Results:

  • The theoretical calculations and ADAMS simulations confirmed the effectiveness of the proposed design method.
  • The physical prototype demonstrated good stability and remarkable mimicry of human foot adaptive locomotion on complex terrain.
  • The tensegrity-based mechanism proved highly effective for terrain-adaptive locomotion in unstructured environments.

Conclusions:

  • The proposed bioinspired tensegrity foot mechanism offers a viable solution for adaptive locomotion in challenging terrains.
  • This approach significantly enhances robotic stability and adaptability, closely replicating human foot capabilities.