MSDV (Motion Sickness Dose Value)
晕动症剂量值（MSDV），由 ISO 2631 标准定义，对车辆加速度按频率加权得到，用来预测晕动症的发生概率与严重程度。源自船舶工业，最初只考虑 z 轴（垂直）加速度，用于汽车研究时通常要扩展到 x/y 轴。
English Definition
"A standardized metric defined in ISO 2631 that calculates the vibration dose of vehicle motion by frequency-weighting accelerations, used to predict the likelihood and severity of motion sickness."
用法说明 · 针对中文母语者
读作 M-S-D-V。原始 ISO 2631 MSDV 仅考虑垂直方向；汽车研究多用三维合并版本（three-axis MSDV）。通常作为客观控制变量，与主观 MISC 评分对照使用。
常见错误
- ·不要把 MSDV 与 VDV（Vibration Dose Value）混淆；MSDV 输出的是'剂量'，不是判定阈值，不能单独用来'判定是否晕车'。
真实用例 · 2 条
"The ISO 2631 standard (ISO, 1997) defines a calculation based on the driving behaviour resulting in the 'Motion sickness dose value' (MSDV). This calculation considers the accelerations of the vehicle and provides a value to indicate the incidence of motion sickness."
"An overall MSDV value taking into account accelerations in all three dimensions can be calculated as shown by Asua et al. (2022)."