Variable stiffness actuators: The user's point of view.
Giorgio GrioliSebastian WolfManolo GarabiniManuel G. CatalanoEtienne BurdetDarwin G. CaldwellRaffaella CarloniWerner FriedlMarkus GrebensteinMatteo LaffranchiDirk LefeberStefano StramigioliNikos G. TsagarakisMichaël Van DammeBram VanderborghtAlin Albu-SchäfferAntonio BicchiPublished in: Int. J. Robotics Res. (2015)