For the transmission mechanism of myoelectric controlled prosthetic hand as the research abject

the new transmission scheme of auto speed-changing system of myoelectric controlled prosthetic hand is proposed.Considering the time-varying meshing stiffness of gear pair

the transverse

longitudinal vibration and vibrat ion along the meshing line direction of each gear

the torsion-supporting stiffness of center member and so on

the transmission system dynamics model of this new automatic speed-changing system is established.Through the bear

the transmission system and structural system are coupled together and the two-stage planetary gear-clutch-bearing-shell body coupling dynamics model of the myoelectric control prosthetic hand automatic speed-changing system is deduced and established.The Lanczons algorithm of finite element software is used to analysis the dynamic characteristic

which verifies the feasibility of this new system scheme.