Abstract
In a car crash, if deformation of occupant lung is held to the allowable value, no aftereffect will remain. In order to realize this condition, the active seat belt, which adjusts instantaneously the tension, has been proposed. In this study, the actuator which controls the tension using the friction is improved in order to suppress the overshoot of the lung deformation, and the effectiveness is confirmed by the control experiment using the scale model. As the result, the overshoot of the lung deformation can be suppressed to 20%, the deformation after the overshoot can be settled near the target, and the deformation rate can be suppressed to 1.6 times of the target.
