Design and Experimental Characterization of a Hydrostatic Transmission for Upper Limb Exoskeletons 
The authors introduce a design of a novel hydrostatic air-liquid torque transmission system for an upper limb exoskeleton. Transmission of fluid on rolling membrane cylinders guarantees leakage-free operation, no backlash, and zero stick friction. By employing a new test bench of the fluid transmission system developed, they conducted experiments to characterize the static and dynamic response for different design parameters.
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