Robotic exoskeletons – wearable shells constructed from different robotic parts – improve the stability and strength of their users. Most exoskeletons to date have been made using a monocentric fixed-axis rotating hinge model: a simple and effective solution, but one that does not reflect the polycentric movement of human joints. A new approach has used n-bar linkages to join limb-like components. This technique does not restrict movement but can result in loose structures if used excessively. Recent technological advancements have allowed for increasingly sophisticated robotic limbs with greater control. Researchers at Xi’an Jiaotong University in China have introduced a more robust and flexible model inspired by arthropods – invertebrate animals including myriapods, crustaceans, insects, and arachnids – a class that features biological exoskeletons, paired jointed appendages, and segmented bodies.
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