능동4륜조향장치의 이상상태 발생시 차량거동에 관한 연구

The failure of the 4WS (Four-Wheel-Steering) system is a very important problem in the 4WS vehicle because it might give a fatal injury to the driver. If the 4WS system fails, the vehicle would be so uncontrollable that there is a great possibility of a serious accident. So, the failure of the 4WS system is critical to the vehicle. There are two steps in preventing an accident caused by the failure. The first step is perceiving whether the failure happens or not, and the second is doing something properly not to happen an accident. In this paper, the methods of perceiving some failures and avoiding the accident of the vehicle are proposed assuming that the ECU of the system is operating normally. The simulation with MATRLXx is performed to verify the method of perceiving the failure, and the simulation with ADAMS to find the most appropriate way of avoiding the accident using full vehicle model.