Kazutomo Murakami

Vibration isolating support device

A vibration isolating device comprises a base, a plurality of support members each placed onto the base and comprised of a two series layer of an electroviscous body and an elastomeric body, and a cradle supported through these support members. These support members are provided with circuit for applying voltage to each electroviscous body, respectively.

Proposal of ride comfort evaluation method using the EEG

In this study, we propose the ride comfort evaluation method by using the electroencephalography (EEG). Recently, the subjective evaluation method that is questionnaire survey etc. is used for introducing the human sensibility. However, it is not established because of the difficulty of obtaining the human sensibility. Moreover, the objective evaluation method is hoped because the subjective evaluation method has ambiguous criterion by individual, and difference of sensitivity. Therefore, we propose the evaluation method by using the EEG that objective evaluation is possible. In this study, we investigate a ride comfort of car driving. We use the general car and we investigate the ride comfort according to the difference of the tire. The EEG is measured in driving condition. Moreover, the ride comfort subjective evaluation is surveyed by semantic differential method (SD method). The feature of the EEG during the driving and feature of the subjective evaluation is extracted by the factor analysis (FA). From the result, the EEG feature and subjective evaluation feature has correlation. Thus, the effectiveness of the proposed method as an objective evaluation method was shown.