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Related Concept Videos

Muscles of the Forearm that Move the Hand and Fingers01:16

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The muscles of the forearm that move the wrist, hand, and digits are numerous and diverse. They can be classified into two groups based on their location and function — the anterior and posterior compartment muscles.
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Nine muscles are involved in arm movements. Two of these, the pectoralis major and latissimus dorsi, originate from the axial skeleton and are called axial muscles. The other seven originate from the scapula and are called the scapular muscles.
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Machines are complex structures consisting of movable, pin-connected multi-force members that work together to transmit forces. One example of a machine is the cutting plier, which is used to cut wires by applying forces to its handles. When equal and opposite forces are exerted on the handles of the cutting plier, they cause the cutting edges to come together and apply equal and opposite reaction forces on the wire, which are greater than the applied forces.
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A toggle clamp is a mechanical device commonly used for holding and clamping objects in various applications, such as woodworking, metalworking, and assembly operations. Consider a toggle clamp subjected to a force of 200 N at the handle. The vertical clamping force can be calculated, provided the dimensions of the toggle clamp are known.
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Muscle coordination is a complex and finely tuned process essential for smooth and purposeful movements like flexion, extension, adduction, abduction, and rotation. The human body orchestrates the actions of various muscles working in concert, each with a specific role. Four functional types describe how muscles work together: agonist, antagonist, synergist, and fixator.
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The JamHand: Dexterous Manipulation with Minimal Actuation.

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Researchers developed a novel robotic hand using material phase transition effects for dexterous manipulation. This innovation simplifies complex grasping tasks, making advanced robotics more accessible for everyday applications.

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Area of Science:

  • Robotics
  • Materials Science
  • Mechanical Engineering

Background:

  • Human dexterous manipulation, involving grasping and object handling, remains a significant challenge in robotics.
  • Current robotic hands often suffer from complexity and high costs due to intricate biomechanics and motor control.
  • Existing solutions struggle to replicate the versatility of human hand capabilities for daily tasks.

Purpose of the Study:

  • To explore an alternative approach for robotic grasping and manipulation.
  • To design a simplified robotic hand capable of performing complex dexterous tasks.
  • To investigate the application of material phase transition effects in robotics.

Main Methods:

  • Developed a novel robotic hand design utilizing multi-finger material phase transition effects.
  • Focused on achieving fundamental dexterous manipulations and various grasp types (precision and power).
  • Employed only two actuators to control the hand's functionality.

Main Results:

  • The robotic hand successfully achieved six fundamental dexterous manipulations.
  • The system demonstrated proficiency in both precision and power grasps.
  • The hand was tested and validated on a variety of real-world grasping and manipulation challenges.

Conclusions:

  • Leveraging the phase transition of granular materials offers a viable method to reduce robotic hand complexity.
  • This approach presents a pathway towards more accessible and cost-effective robotic hands for daily tasks.
  • The study highlights the potential of material properties to overcome key challenges in robotic manipulation.