Biomedical Engineering Reference
In-Depth Information
Fig. 7.16 Body model
BoMo 4 in lateral posture:
initial state at zero contact
(top) and during interaction
with system LS2 (bottom)
Fig. 7.17 True scale
deformation of the spine
(a and b, top) and spine
deformation (a and b, bottom)
a with and b without common
reference point
Due to the different foam material characteristics, body displacement at static
state also differs. A comparison of total displacement is thus not meaningful,
cf. Fig.
7.17
a. To compare spine deformation, the displacement was normalized by
the displacement of the vertebrae 5, cf. Fig.
7.16
, allowing direct comparison,
Fig.
7.17
b. Figure
7.17
a and b show the spine deformation in true scale (top), with
and without a common reference point (bottom). A slight deviation of the spine
from the ideal (horizontal) state is apparent. However, the influence of membrane
pressure and foam material is negligible.
