An estimation of strength ratios of antagonistic muscle groups based on variable moment arm

This paper proposes an estimation method of muscular strength based on only output force information at an end-effector of a limb. The muscular strength estimated by the proposal is neither the strength of arms and legs nor torque of a joint. It is output force of functionally-classified muscle groups. Convergence performance of estimation results is improved by utilizing a model taking joint angular dependency of moment arms into account.