@article{paperid:1021319, author = {Akbarzadeh Tootoonchi, Alireza and Javad Enferadi}, title = {A Virtual Work Based Algorithm for Solving Direct Dynamics Problem of a 3-RRP Spherical Parallel Manipulator}, journal = {Journal of Intelligent and Robotic Systems}, year = {2011}, volume = {63}, number = {1}, month = {January}, issn = {0921-0296}, pages = {25--49}, numpages = {24}, keywords = {Spherical parallel manipulator · Direct link Jacobian matrix . Direct dynamics · Virtual work}, }