Nearly Indestructible Meshworm Robot May Have Range of Applications
By Rob Scott
August 13, 2012
August 13, 2012
- Taking their cues from natural science, engineers have developed flying drones inspired by birds and swimming robots that emulate jellyfish.
- The earthworm is the latest creature to inspire a team of scientists from MIT, Harvard and Seoul National University. Led by Professor Sangbae Kim, the team has created a robotic device named “Meshworm,” that crawls along the ground via the principle of peristalsis.
- “The device is propelled by a spiral-shaped coil of artificial muscle made of a titanium and nickel alloy, a material chosen for a particular reason: It stretches when heated and contracts back to its original shape once cooled,” reports Smithsonian.com.
- “The engineers used an internal battery and circuit board to apply a weak electric current to different muscle segments within the Meshworm, heating each of them in turn,” explains the article. “When each segment is heated, it expands in length, causing the outer circumference of the mesh to briefly contract, then return to its original size quickly afterward.”
- The motion occurs successively at each segment of Meshworm, creating a wave of contraction that enables movement across the ground (the article includes a video of the lifelike movement). Steerage is controlled via lengthwise artificial muscles that are pulled when heated.
- Since the Meshworm parts are all fibrous and flexible, it is nearly indestructible.
- “The research is funded by DARPA…and some speculate that the robot could someday be used in reconnaissance missions, since it could be air-dropped, launched or thrown over relatively long distances and land without harm,” notes the article.
- And since it can navigate rough terrain and fit into small spaces — quietly and inconspicuously — it may serve as a future robo-spy. The shape-changing artificial muscle technology may also be used for medical devices, prosthetics and CE devices such as mobile phones and portable computers.
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