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Compute vertical impulse from GRF

Source: R/kinetics-forceplate.R
computeImpulse.Rd

Integrates vertical force over detected stance phases using trapezoidal integration.

Usage

computeImpulse(
  force,
  sampling_rate,
  threshold = 20,
  subtract_threshold = FALSE
)

Arguments

force

Numeric vector or matrix of vertical force values.

sampling_rate

Sampling rate in Hz.

threshold

Contact threshold in force units.

subtract_threshold

Logical; if TRUE, subtracts threshold before integrating each stance (negative values clipped to zero).

Value

For vector input: data.frame with one row per stance and columns including impulse (force*time units). For matrix input: same structure plus channel.

References

Winter DA (2009). "Biomechanics and Motor Control of Human Movement." 4th ed. John Wiley & Sons.

See also

analyzeForcePlate() for comprehensive force plate analysis, computeLoadingRate() for loading rate computation.

Examples

grf <- c(rep(0, 50), rep(600, 100), rep(0, 50))
computeImpulse(grf, sampling_rate = 1000)
#>   stance onset offset duration_s impulse
#> 1      1    51    150      0.099    59.4