694673.fig.0010a
(a)
694673.fig.0010b
(b)
694673.fig.0010c
(c)
694673.fig.0010d
(d)
Figure 10: Failed steering motors stuck at different angles: (a) rear-left wheel; (b) rear-left and rear-right wheels pointing outwards; (c) rear-left and rear-right wheels pointing inwards; (d) rear right and middle right pointing perpendicular to each other.