A new type of 3-DOF manipulators based on(U+UPS)P+UPS mechanisms was proposed.Firstly,the inverse position equation was presented,the velocity transmission model and the statics transmission equation were established respectively.Also,the 3 D maps of the workspaces and the 3 Dmaps of condition number of Jacobian matrix in the workspaces were drawn by searching method.Then,a set of kinematics performance evaluation indexes were defined,and the relationship curves among structure parameters and the kinematics...