Yaw and pitch speed reducers generally adopt multi-stage planetary gear transmission

due to axial dimension restrictions;and for the sake of convenient processing and assembly

single-arm planet carrier is widely used.However

single-arm planet carrier exists the problem of poor stiffness and is not so good in load state.Using CAE technology

finite element analysis of single-arm planet carrier for yaw and pitch speed reducers is carried out

and the structure is optimized for seeking a kind of single-arm planet carrier with light weight and small deformation.