From the deformation analysis of one single limb of the 3-PPRR 3-DOF reducible translational parallel mechanism, the stiffness model of the mechanism is set up.

• 摘要从3-PPRR三自由度可约移动并联机构的单分支受力变形入手，分析了整个机构的刚度，建立了刚度模型。