With the development of better materials which mimic the store-and-release cycle of animals, walker might start to catch up soon. And while most legged machines are highly inefficient, a few of the more advanced designs such as MIT’s Cheetah robot are comparable to wheels for efficiency. And of course legs do have advantages when crossing obstacles or steep slopes. This suggests that optimally designed – or evolved – walkers can match wheels or tracks. ![]() “We see a strong similarity between biological and artificial systems …organisms and artificial systems agree closely with the Heglund formula,” the researchers conclude.
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