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Related Experiment Video

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Author Spotlight: Enhancing Grasping Abilities for Hemiplegic Patients with Flexible Robotic Limbs
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Shock Resistive Flexure-Based Anthropomorphic Hand with Enhanced Payload.

Junmo Yang1, Jeongseok Kim1, Donghyun Kim1

  • 1Department of Robotics Engineering, Daegu Gyeongbuk Institute of Science and Technology (DGIST), Daegu, South Korea.

Soft Robotics
|March 5, 2021
PubMed
Summary
This summary is machine-generated.

A novel paired Crossed Flexural Hinge (p-CFH) enhances humanoid robot hands, enabling stable grasping of various objects and heavy payloads. This design also absorbs impacts, protecting the robot from damage.

Keywords:
anthropomorphic hand robotcross flexure hingeshock resistive robotsoft hand robot

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Area of Science:

  • Robotics
  • Mechanical Engineering
  • Materials Science

Background:

  • Humanoid robot hands require a balance of rigidity for payload capacity and compliance for impact absorption.
  • Conventional Crossed Flexural Hinges (CFH) present stiffness limitations for anthropomorphic designs.
  • Existing designs often struggle with grasping diverse object shapes and withstanding external forces.

Purpose of the Study:

  • To design a humanoid robot hand with enhanced rigidity and impact absorption capabilities.
  • To address the stiffness limitations of traditional CFH structures in robotic hands.
  • To develop a robot hand capable of stable grasping and damage resistance.

Main Methods:

  • Utilized a 6x6 stiffness matrix to analyze the structural properties of CFH.
  • Proposed and implemented a paired CFH (p-CFH) structure for robot hand joints.
  • Employed an underactuated wire mechanism for shape-adaptive grasping.
  • Conducted theoretical analysis, experimental verification, qualitative, and quantitative impact tests.

Main Results:

  • The p-CFH structure demonstrated superior stiffness compared to conventional CFH.
  • The developed humanoid robot hand achieved stable grasping of objects with unspecified shapes and heavy payloads.
  • The robot hand successfully absorbed impact forces in arbitrary directions without sustaining damage.
  • Verified shock-absorbing capabilities through numerical comparison with a control model.

Conclusions:

  • The p-CFH structure significantly improves the rigidity and load-bearing capacity of humanoid robot hands.
  • The enhanced robot hand design offers robust grasping and effective impact absorption, combining rigid and compliant characteristics.
  • This study presents a viable solution for creating more versatile and durable humanoid robotic hands.