Characteristic evaluation of the enforcement device of lambda type for the automobile

Abstract

The machine for forcibly stopping a car, enforcement device, is used for prevention of the traffic accident and for the safety securement of a human. However, sufficient investigation and research for the performance improvement of the enforcement device have not been reported. Therefore, it is necessary to understand the characteristics and behavior of the machine for improvement of the collision safety and the reliability of the machine, and optimization of the structure. In this study, collision and stop behavior and braking distance of the enforcement device were investigated for characteristic evaluation. The basic theory for the braking distance was derived using the impulse momentum equation and the law of the conservation of energy. By this basic theory, effective arm angle range of enforcement device was clarified. And also, the collision test was carried out by simple model of the enforcement device and the vehicle. The behavior of the enforcement device was examined by the simple model with 3 kinds of different arm angles. The braking distance by the experiment was well agreement with theoretical result. It is possible to optimize and improve the enforcement device by these evaluations of collision behavior.