Determination of the human arm stiffness efficiency with a two antagonist muscles model

In the last years, due the working age increase, more and more attention was given to the use of exoskeleton for industrial applications, such to reduce fatigue and the operator effort. Since in industrial practice, stiffening the joint is a requested action for those operations in which precision is needed, an exoskeleton whose stiffness could be controlled by the operator would reduce the operator discomfort. In this paper we attempt to study the stiffness of the elbow on which two muscles act as agonist-antagonist and we proposed an estimation of the efficiency.