A team of scientists from Seoul National University has developed an innovative “intelligent artificial muscle” that can perform movement and sensing simultaneously. This advancement could eliminate the need for bulky external sensors in future robotic systems.
The traditional robotic actuators face a significant limitation: their movement and sensing functions are separate. For robots to gauge the force they apply to objects, they typically require complex control systems and numerous sensors. Professor Yon-Lae Park and his team have addressed this challenge using liquid crystal elastomers (LCE).
Structure of the New Muscle
The new muscle comprises:
- Liquid Metal Channels: One channel acts as a “motor,” contracting when heated, while the other serves as a sensor, measuring force and deformation in real-time.
- Muscle-Tendon Complex: This system mimics the connection of tendons to muscles, allowing signal transmission similar to that of the human somatic nervous system.
Capabilities of the New Technology
The researchers have already tested the technology on robotic fingers and gripping mechanisms, achieving results that exceeded their expectations.
Among the accomplishments are:
- Autonomous Recognition: The robot was able to independently assess the size and stiffness of the objects it grasped.
- Delicacy: With its ability to sense resistance, the device can manipulate fragile items without risking damage.
- Speed and Precision: By configuring two muscles as antagonistic pairs (working in opposite directions like biceps and triceps), the scientists achieved remarkably precise movement control.
Comparison of the operational principles of biological and artificial muscles—left and a robotic hand equipped with artificial muscles—right (screenshot: Advanced Materials)
Potential Applications of the Artificial Muscle
Professor Yon-Lae Park believes this development heralds a new era of “physical intelligence” in robotics. Potential fields for the implementation of this innovative technology include:
- Humanoid Robots: These machines will become more flexible and safer for human interaction.
- Medicine and Rehabilitation: The creation of advanced prosthetics and exoskeletons that can “feel” the movements of patients.
- Logistics: Automated systems capable of sorting items of varying weights and strengths without the need for parameter adjustments.
Currently, the researchers are focused on optimizing the cooling of the muscles to enhance their operational speed and automating the production of such components.
Researchers at Seoul National University have unveiled an intelligent artificial muscle that integrates movement and sensing capabilities, potentially revolutionizing robotics. This technology promises advancements in various fields, including humanoid robots, medical devices, and logistics.