Rigid-Body Dynamic Analysis of Multi-Stage Planetary Roller Screw Mechanism Xin Li, Geng Liu, Chunyu Song, Xiaojun Fu, Shangjun Ma and Qi Wan JNWPU, 38 5 (2020) 1001-1009 Published online: 08 December 2020 DOI: 10.1051/jnwpu/20203851001