Description
Allocate body-segment masses from supplied fractions.
Biomechanical normalization depends on a body, material or reference-length basis. A dimensionless force, strain or allocation fraction can be consistent with supplied numbers without establishing actual anatomy, healthy motion, appropriate training or safe tissue loading.
Allocate body-segment masses from supplied fractions.
When to use this tool
Use Segment Mass Fraction Budget when checking the stated biomechanical scale, strain or mass-basis convention.
How to use the tool and how it works
- Enter fractions, totalMass. Use the units and conventions below.
- Run the tool. Correct any format, range, or cross-field input error before interpreting the output.
- Read assignedMasses, unassignedMass. Use the output convention below.
Allocate body-segment masses from supplied fractions. Require totalMass >= 0 and every fraction in [0,1]; assignedMasses multiply total mass, unassignedMass = totalMass*(1-sum(fractions)).1
| Input field | Meaning and units | Accepted input |
|---|---|---|
| fractions | Fractions | Required. Array of finite number; maximum items 256. |
| totalMass | Total Mass | Required. Finite number; minimum 0. |
| Output field | Interpretation | Returned shape |
|---|---|---|
| assignedMasses | Assigned Masses | Required. Array of finite number; maximum items 256. |
| unassignedMass | totalMass*(1-sum(fractions)); may be negative because fraction total is not restricted. | Required. Finite number. |
{
"input": {
"fractions": [
0.1,
0.2
],
"totalMass": 80
},
"output": {
"assignedMasses": [
8,
16
],
"unassignedMass": 56
}
}Limitations and assumptions
- The fraction sum is not restricted to one; negative unassigned mass exposes over-allocation rather than being rejected.
- Inputs must satisfy both the field types and the cross-field conditions above. Invalid input causes an error; a successful false flag or documented placeholder is a different result.
- Numeric calculations use binary floating point unless exact decimal-integer arithmetic is explicitly stated. No hidden measurement tolerance or decimal rounding is added; nonfinite or out-of-contract results are rejected. Numeric signed-zero results are exported as zero.
Alternative or Complementary methods
Use calibrated measurements and an appropriate complete biomechanical model; consult qualified health or movement professionals for care, rehabilitation or safe activity decisions.
References
Similar or alternative tools
- Segment Mass Moment Contribution
Return a parallel-axis inertia contribution.
- Segment Inertia Parallelaxis Reference Offset
Return inertia about a shifted parallel axis.