A rotor-separated dynamic modeling method for flexible manipulators based on FS-SEA

Abstract

A rotor-separated dynamic modelling method is proposed based on the dynamics of spatial operator algebra in this paper, for n-DoF serial flexible-joint manipulators with harmonic reducers and with FS-SEAs (force sourced series elastic actuators) as flexible mechanisms. The completed dynamic model comprises the flexible joint dynamics and the whole arm dynamics. Inverse dynamics and forward dynamics of the two parts are researched respectively, through which the complete rotor-separated dynamic model is finally derived. The modelling method proposed in this paper is verified by simulations. And the simulation results demonstrate the significant advantages of the proposed method.