Motion sickness incidence from ISO 2631-1 / NORDFORSK - integrated weighted acceleration exposure over 2 hours.
Formula
$$ \text{MSI} = f(a_w, t) \approx a_w \cdot t_{min} $$
Symbol legend
| Symbol | Meaning | Unit | Source |
|---|---|---|---|
| $\sigma_z$ | σ vertical acceleration | m/s² | strip theory |
| $a_w$ | Frequency-weighted acceleration | m/s² | ISO 2631-1 |
Sources
- ISO 2631-1:1997.