Download 3D Static Strength Prediction Program Version 5.0.4 User`s Manual

3D Static Strength Prediction Program Version 5.0
The center of pressure is compared to the Basis
of Support and the Functional Stability Region (not
delimited on the graphic) to determine if the balance condition is either ACCEPTABLE, CRITICAL, or UNACCEPTABLE. See Section 9.8 for
definitions and the detailed balance reports..
pulling tasks for risk of falls due to slippage, this is
the coefficient of static friction between the floor
and the shoe soles required to prevent slippage
given this specific combination of posture and load.
9.3
9.2.5
Required Coefficient of Ground
Friction
Horizontal forces at the L5/S1 vertebral disc are
transmitted directly to ankle level since there is no
horizontal external force entry at the lower extremities. Therefore, the ratio of horizontal forces at the
L5/S1 level (where upper extremity is assumed to
be connected to the lower extremity) to the sum of
upper body weight, lower body weight, and vertical
hand loads is the required coefficient of ground
friction at the feet. Useful in analyzing pushing and
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FATIGUE REPORT
// New in 5! // The Fatigue Report (Figure 9.4) displays the calculated percent of maximum voluntary
contraction (MVC) of the required effort at each
joint. Percentages are calculated for three population strength capabilities; 5, 25, and 50 percentile
corresponding to very weak, weak, and average
strength workers. These values can be used with
frequency and duration information to estimate localized muscular fatigue. See Rohmert (1973) and
other more recent work.
Figure 9.4: Fatigue report
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