3-UPU parallel mechanism 1 McKibben muscle 1 SMA actuator 1 V2SOM 1 VSA actuation burden 1 artistic rendering 1 cable-driven parallel robots 1 cable-driven robots 1 cobot 1 collaborative robot 1 collaborative robots 1 compliance control 1 compliant mechanism 1 computer-aided design 1 cylindrical 1 economic locomotion 1 elliptical 1 energy efficiency 1 exercising device 1 fail-safe operation 1 force reflection 1 gait planning 1 graphical user interface 1 grasp stability 1 hand exoskeleton 1 haptic glove 1 hexapod walking robot 1 human-machine interaction 1 human-robot-interaction 1