| Summary: | 碩士 === 國立臺灣科技大學 === 機械工程系 === 95 === Safety has always been the primary concern to the vehicle drivers, government, and the automobile industry. Articulated vehicles, due to their larger size, usually involve more severe damage to human body and property. In particular, several crashes types are unique to articulated vehicles, and the active safety systems for those accidents have received relatively less attention in the literature. Testing of active safety systems with full-size articulated vehicles is an expensive and hazardous endeavor. This fact motivates the use of a scaled vehicle as the evaluation test bed for vehicle control systems. In this paper, this idea is applied to articulated vehicles. The scaled articulated vehicle is designed and constructed based on a 1/14 reduction in length from a full-size Hino truck. The Buckingham Π theorem states that if the dimensionless parameters (the Π group) are matched between two structurally similar dynamical systems, the dynamic similitude between the two systems is ensured. The Π group is derived from the mathematic model of the articulated vehicle, and the parameters of the scaled vehicle are tuned to match the Π group of the full-size truck. And add a contact friction on the fifth wheel. The value of the fifth wheel contact friction is estimated from a series of off-line experiments. Preliminary experiments indicate that the dynamic responses of the scaled vehicle match the simulated results based on the vehicle model, thus supporting the validity of the scaled articulated vehicle. The scaled articulated vehicle is utilized in the development of a jack-knife prevention control system. Then use the jack-knife prevention controller, the experimental evaluations of the jack-knife prevention safety systems are good.
|
|---|
