The Scoutrobot must be sufficiently durable to withstand an impact
with the ground or obstacle when jumping, which can be
determined by analyzing the stress distribution during impact.
We used the Nastran software package to determine the stresses
on the robot body. The weakest parts were the wheels and wheel
gears. The gear axis had the highest stress, but this was not above
the maximum yield stress of the material, demonstrating that the
structure as a whole is sound (Fig. 6). The robot is equipped with a
spring suspended shock absorbers rather than standard absorbers
in order to reduce wheel mass. This results in a set of springs
resembling umbrella ribs which makes the total wheel weight light. Usually, standard shock absorbers are heavy not to be employed
in jumping robot. In addition, the standard costs relatively
higher than the umbrella ribs typed spring suspension.