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Research questionHow can powered knee prostheses reduce actuator mass and size without sacrificing torque, controllability, or functional performance?Powered knee prostheses need substantial torque and responsive control to assist movement, but the hardware required can make them heavy and bulky. Reducing the actuator’s size and mass may also affect backdrivability, precision, and assistance during walking or sit-to-stand transitions.
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Robotics
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Latest papersRecent research connected to this question, newest first.Design and Validation of a Lightweight, Low-Profile Powered Knee Prosthesis with Quasi-Direct Drive ActuationThe source describes a lightweight, low-profile quasi-direct-drive knee prosthesis using an 18:1 two-stage transmission. It reports a 2.6 kg mass, 24.5 cm build height, 145 Nm peak torque, 1 Nm backdrive torque, and precision position and torque control. Evidence includes benchtop testing and walking and sit-to-stand trials with three participants with transfemoral amputation; it does not establish broader clinical outcomes.research paper · Sep 2, 2026
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