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Related Concept Videos

Mechanical Systems01:22

Mechanical Systems

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Mechanical systems are analogous to to electrical networks where springs and masses play similar roles to inductors and capacitors, respectively. A viscous damper in mechanical systems functions similarly to a resistor in electrical networks, dissipating energy. The forces acting on a mass in such systems include an applied force in the direction of motion, counteracted by forces from the spring, a viscous damper, and the mass's acceleration. This interplay of forces is mathematically...
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Joints form during embryonic development in conjunction with the formation and growth of the associated bones. The embryonic tissue that gives rise to all bones, cartilage, and connective tissues of the body is called mesenchyme.
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Support Reactions in Three Dimensions01:27

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Support reactions in three dimensions help maintain the stability and equilibrium of various structures and systems. These reactions prevent the system from translating and rotating, ensuring the design can withstand external forces and perform its intended function efficiently and safely. Some of the supports providing support reactions in three dimensions are discussed below:
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Related Experiment Video

Updated: Oct 2, 2025

Author Spotlight: Enhancing Grasping Abilities for Hemiplegic Patients with Flexible Robotic Limbs
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Pneumatic Bionic Hand with Rigid-Flexible Coupling Structure.

Chang Chen1, Jiteng Sun1, Long Wang1

  • 1School of Mechanical Engineering, Hangzhou Dianzi University, Hangzhou 310018, China.

Materials (Basel, Switzerland)
|February 25, 2022
PubMed
Summary

This study introduces a novel bionic hand using Fast Pneumatic Networks (FPNs) for enhanced gripping strength. The developed soft robotic hand features a human-like design with omnidirectional thumb and modular fingers, validated through simulation and experiments.

Keywords:
liquid silicone rubbermechanical modelingmotor micropumprigid-flexible couplingsoft gripper

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Area of Science:

  • Robotics
  • Materials Science
  • Biomimetics

Background:

  • Existing soft gripping hands suffer from low load-bearing capacity.
  • The development of dexterous and robust robotic hands remains a significant challenge in soft robotics.

Purpose of the Study:

  • To design and develop a rigid-flexible composite bionic hand with improved load-bearing capabilities.
  • To create a human-like soft gripping hand with a focus on soft finger actuation and control.

Main Methods:

  • Utilized the Fast Pneumatic Network (FPN) approach for soft finger actuation.
  • Developed a mathematical model based on the second-order Yeoh model and validated it using ABAQUS simulation.
  • Employed 3D printing and mold pouring for prototype fabrication and a pneumatic control system with a motor micro-pump.

Main Results:

  • Successfully designed and prototyped a human-like bionic hand with an omnidirectional thumb and four modular soft fingers.
  • Validated the feasibility of soft finger bending through mathematical modeling, ABAQUS simulation, and experimental analysis.
  • Demonstrated accurate mathematical model and simulation through comparative experiments on finger bending performance.

Conclusions:

  • The developed rigid-flexible composite bionic hand effectively addresses the low load issue of soft grippers.
  • The combination of FPNs, advanced modeling, simulation, and fabrication techniques enables the creation of functional soft robotic hands.
  • The study confirms the accuracy of the proposed models and control system for human-like gestures and grasping.