Researchers have developed an unusual earthworm-like soft skin robot equipped with bristles that help it crawl. This soft surface was inspired by the earthworm’s epidermis and their setae, with the bristles arranged in triangular and square grids at two spatial densities for locomotion.
What the researchers discovered was that doubling the amount of bristles increased the robot’s speed by a factor of 1.78 for the triangular grid, although it is less pronounced for the rectangular grid with a small factor of 1.06. However, increasing the actuation stroke for the skin with the high-density triangular grid, from 15% to 30%, elevated its speed from 0.5 to 0.9 mm/s. This study successfully demonstrated that a crawling robot equipped with soft skin can traverse both a linear and a curved channel.
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