Fig. 20
From: RWD-DOF: a dual-degree-of-freedom reconfigurable wheel design for improved robotic mobility

The trajectory of the center of mass of the reconfigurable wheel going up and down stairs.
From: RWD-DOF: a dual-degree-of-freedom reconfigurable wheel design for improved robotic mobility

The trajectory of the center of mass of the reconfigurable wheel going up and down stairs.