Soft Actuators Go From Squishy to Stiff (and Back Again)
Soft actuators are appealing for robotics because they’re cheap (made out of plastics or polymers and air), inherent compliant and relatively safe for humans to interact with, and able to adapt themselves to grip a wide range of objects. Being soft does tend to make them by definition bad at being hard, so for those times when you need an actuator with some stiffness, well, that’s just too bad.
Or is it?
Researchers at Technische Universitat Berlin led by Professor Oliver Brock have combined soft pneumatic actuators with a jamming system that results in a variable-stiffness actuator that’s soft when you want and hard when you want.