Depending on the angle, the robot can move faster over different surfaces, climb over taller objects, or slip into narrow passageways, among other tasks
Students at UC Berkeley have developed the STAR, a 3D-printed robot that flattens its legs to slip under small spaces and raises them up again to climb over obstacles
At a sprawl angle of zero degrees, the robot lays flat on the ground and has a height of just 2.5 cm (1 in), with a length of only 12 cm (4.7 in) and a width of 11 cm (4.3 in)
Each of the legs has three spokes measuring 2.8 cm (1.1 in) with a 90-degree gap between them, which allow it to crawl over obstacles 4 cm (1.6 in) higher than if it just had wheels
At a 90-degree sprawl, the robot can fit through smaller vertical spaces and travel over rough terrain more easily
Nature has been the source of inspiration for a variety of different forms of robotic locomotion. Yet another example is the STAR, a 3D-printed robot modeled after an insect's ability to squeeze into even the tiniest spaces. Developed by students at UC Berkeley's Biomimetic Millisystems Lab the STAR, which stands for Sprawl Tuned Autonomous Robot, is able to flatten its legs down to slip under a small gap and then raise them up again to climb over larger obstacles.
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