Description
Apply supplied plate/laboratory force-axis signs.
Mechanical inertia, torque and muscle-force projections require compatible axes, origins and geometric assumptions. A parallel-axis contribution, planar moment or ideal pennation factor is one local model term rather than a full anatomical load or muscle-activation calculation.
Apply supplied plate/laboratory force-axis signs.
When to use this tool
Use Force Plate Cross Axis Reference Sign when evaluating the stated segment, moment, inertia or ideal muscle-geometry term.
How to use the tool and how it works
- Enter force, plateSign, laboratorySign. Use the units and conventions below.
- Run the tool. Correct any format, range, or cross-field input error before interpreting the output.
- Read laboratoryForce, signFlipped. Inspect signFlipped before interpreting the associated values.
Apply supplied plate/laboratory force-axis signs. Require each sign -1 or +1; laboratoryForce = force*plateSign*laboratorySign, signFlipped means signs differ.1
| Input field | Meaning and units | Accepted input |
|---|---|---|
| force | Force | Required. Finite number. |
| plateSign | Plate Sign | Required. Safe integer. |
| laboratorySign | Laboratory Sign | Required. Safe integer. |
| Output field | Interpretation | Returned shape |
|---|---|---|
| laboratoryForce | Laboratory Force | Required. Finite number. |
| signFlipped | Sign Flipped | Required. Boolean. |
{
"input": {
"force": 100,
"plateSign": 1,
"laboratorySign": -1
},
"output": {
"laboratoryForce": -100,
"signFlipped": true
}
}Limitations and assumptions
- No sensor orientation or anatomical axis is detected; compatible sign conventions are required.
- 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 verified anatomy and calibration, a consistent coordinate frame and a complete appropriate mechanical model for actual loading or clinical interpretation.
References
Similar or alternative tools
- Force Plate Free Moment Normal Component
Return force-plate orbital and free normal moments.
- Moment Arm Sign From Axis
Return a signed planar moment under an axis-normal policy.