Description
Return union contact, flight duration and contact fraction.
Motion records combine sampled coordinates, periodic angles, event timing and signed work or impulse conventions. Local numerical differences and panels can be computed independently while actual event detection, full trajectories and physiological significance require complete measurements and analysis.
Return union contact, flight duration and contact fraction.
When to use this tool
Use Stride Contact Double Count Term when checking the stated movement timing, angle, geometry, energy or panel convention.
How to use the tool and how it works
- Enter leftContact, rightContact, simultaneous, cycleDuration. Use the units and conventions below.
- Run the tool. Correct any format, range, or cross-field input error before interpreting the output.
- Read unionContact, flightDuration, contactFraction. Use the output convention below.
Return union contact, flight duration and contact fraction. Require cycleDuration > 0, valid nonnegative left/right/simultaneous durations and union <= cycle; union = left+right-simultaneous, flight = cycle-union.1
| Input field | Meaning and units | Accepted input |
|---|---|---|
| leftContact | Left Contact | Required. Finite number; minimum 0. |
| rightContact | Right Contact | Required. Finite number; minimum 0. |
| simultaneous | Simultaneous | Required. Finite number; minimum 0. |
| cycleDuration | Cycle Duration | Required. Finite number; strictly above 0. |
| Output field | Interpretation | Returned shape |
|---|---|---|
| unionContact | Union Contact | Required. Finite number. |
| flightDuration | Flight Duration | Required. Finite number. |
| contactFraction | Contact Fraction Unit: 1. | Required. Finite number. |
{
"input": {
"leftContact": 0.6,
"rightContact": 0.6,
"simultaneous": 0.2,
"cycleDuration": 1
},
"output": {
"unionContact": 1,
"flightDuration": 0,
"contactFraction": 1
}
}Limitations and assumptions
- Contact overlap is supplied, not detected; no complete gait reconstruction or clinical assessment is performed.
- 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
Inspect calibrated motion/force data and use an appropriate complete trajectory or dynamics analysis; interpret health and safe-loading implications with qualified professionals.
References
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