A groundbreaking study has led to the development of the “hyperelastic torque reversal mechanism” (HeTRM), a new approach that allows robots made from soft, rubber-like materials to perform rapid and powerful movements. Published in Science Robotics, this research was led by Professor Kyu-Jin Cho from Seoul National University’s Department of Mechanical Engineering. The study draws inspiration from nature, specifically the remarkable abilities of the mantis shrimp and flea, known for their extraordinary power and speed despite their soft bodies.
The mantis shrimp is famous for delivering punches at speeds of up to 90 km/h to break through prey, while the flea can leap to heights exceeding 200 times its body length. According to Professor Cho, the secret behind these organisms’ ability to generate such powerful forces lies in the “torque reversal mechanism,” which allows for the rapid switching of rotational force direction applied by muscles to their limbs. This discovery has now been adapted into the field of soft robotics.
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