心拍変化を用いた人間・自動車・環境系の精神負担評価モデルの構築

When we evaluate the driver-vehicle-environment systems, we need to consider the adaptability of the driver. Therefore, in the evaluation of these systems, it is important to consider the factor of the Mental Work Load (MWL) for the driver. It is difficult to measure the MWL directly. Much research on MWL in connection with vital reactions has been done. However, a method of evaluation has not yet been established. In this study, a MWL evaluation is performed using the RRI (R-R Interval), because there is a strong correlation existing between the MWL and the RRI. In order to describe the relationship between the RRI and the factor of the MWL, two kinds of models are constructed. The first model is a static linear model, and the second model is a static nonlinear model. In these models, the RRI of drivers is reproduced. From the result, these models include the relationship between the factor of the MWL and the RRI. Finally, we analyzed the relationship between input and output of the model. The result of that the change of effectiveness is at the entrance and exit points of the curve and the tacking point. It is therefore shown that an analytical method using the MWL evaluation model can be useful for the evaluation of the driver-vehicle-environment system.