Parametric optimal design of a parallel Schönflies-motion robot under pick-and-place trajectory constraints. - Guanglei Wu; Shaoping Bai; Preben Hjornet (IROS, 2015)

On the stiffness of three/four degree-of-freedom parallel pick-and-place robots with four identical limbs. - Guanglei Wu; Shaoping Bai; Preben Hjornet (ICRA, 2016)