In this section, we first present in brief the equations governing the motion of a torus-shaped wheel moving on an uneven terrain
and modeling of a three-wheeled mobile robot equipped with the torus-shaped wheels (see reference [3,4] for details). Next we
present the details of the D4Bar mechanism and simulation of the WMR robot on uneven terrain with and without the D4Bar suspension
mechanism. Three simulations, namely a straight line, a circular arc and a path representing a lane change are studied. Results of
the simulations show that the slip can be significantly minimized when the suspension mechanism is used.