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Léo
@LeoKharon
Robotics research & updates. Co-host @roboticsstack, the weekly pod on what's actually shipping in 🤖
Joined November 2022
469 Following    1.9K Followers
NEW ROBOT HAND: This one is maxing out the degrees of freedom! Yuequan Bionic Technology (北京大器月泉仿生) is a Chinese firm building bionic humanoid robots and their core components Founded by a father-son academic team: Ren Luquan (Chinese Academy of Sciences academician, Jilin University) and Ren Lei (tenured University of Manchester professor, 25 years in bionic robotics). Its flagship is the Ying Shou Y-Hand M1, a dexterous hand it claims has 38 degrees of freedom (breaking the current global record), a 28.7 kg grip, 0.2 s finger closure, and 0.04 mm positioning accuracy, able to thread needles, twist playing cards, unscrew bottle caps and turn pages. The hand is built on the founders' Bionic Tensile-Compressive Body Robot Theory, a rigid-flexible design mimicking human skeletal-muscular anatomy driven by magnetic collector-driven artificial muscles. Around it sit a lower-DoF X-Hand M1 (11 DoF, 530 tactile units), a bipedal X-Bot, and a wheeled W-Bot billed as the world's smallest, with a roadmap to a ~70-DoF Y-Hand M3. I wonder why go for the DoF-maxxing route when other manufacturers seem to converge on ~23 ? 38 now, ~70 next, exceeding the human hand, but a human hand is only ~21–27 DoF, and Sharpa's 22-DoF hand (arguably one of the best in the market) still fails force tasks (screw-bulb 36% on Gemini Robotics 2). Joint count is being marketed as capability, but the binding constraint is force-controlled contact and control, not more joints. More DoF just means more tiny actuators to coordinate. Their approach to actuation is genuinely new however: tensile-compressive rigid-flexible coupling with muscle-like antagonistic drive, not tendon-cables or rigid rotary joints. Most dexterous hands are tendon-driven (Mimic's 16-DoF cable hand) or rigid-jointed. Yuequan claims an anatomy-mimicking rigid-flexible body driven by magnetic collector-driven artificial muscles. If real, that antagonistic muscle approach is what would buy the 28.7kg grip and 0.2s closure with compliance —> a genuinely different mechanical philosophy.
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