Biomedical Engineering Reference
In-Depth Information
Hip Angle
HS
FF
HO
TO
HS
30
20
flexion
10
20-lb
40-lb
80-lb
0
0 0 0 0 0 0 0 0 0 0 0
-10
extension
stance
swing
-20
% Gait Cycle
Knee Angle
HS
FF
HO
TO
HS
70
60
50
40
flexion
20-lb
40-lb
80-lb
30
20
10
0
0 0 0 0 0 0 0 0 0 0 0
stance
swing
% Gait Cycle
Ankle Angle
dorsiflexion
HS
HS
FF
HO
TO
10
5
0
0 0 0 0 0 0 0 0 0 0 0
20-lb
40-lb
80-lb
-5
-10
-15
plantarflexion
-20
stance
swing
% Gait Cycle
Spine Bending Angle
HS
FF
HO
TO
HS
35
30
25
20
20-lb
40-lb
80-lb
15
10
flexion
5
0
0 0 0 0 0 0 0 0 0 0 0
stance
swing
% Gait Cycle
FIGURE 7.22
Joint angle profiles with backpack.
The hip, knee, and ankle motions have no significant differences with different
backpacks. This is because they are all simulated with the same walking velocity
and step length. However, the spine bending angles are significantly affected by
the backpack weights. Heavier weight results in larger spine bending to lower the
center of mass and increase stability.
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