The performance of independent wheels steering vehicle(4WS) applied Ackerman geometry

Recently, The researches of vehiclepsilas stability, controllability and comfortability are demanded because of increased usage of vehicle and mass transportation. The trend of vehicle is that the conventional vehicle accessories of mechanical link scheme are going to electronic module scheme connected by signal. The vehiclepsilas heavy mechanical steering linkages will be replaced to servo motors and signal cables. For example, the four wheel steering(4WS) vehicle driven by electric power has made by WIA corporation. That 4WS type vehicle has various advantages of driving. The vehicle can go leftward or rightward without turning and can turn in standing state. But past researches were proceeded based on mechanical system. To convert heavy mechanical accessories to electronic modules, the proper modeled signals and research data based on electronic system are needed. In this paper, the Ackerman geometry in mechanical system is applied to electronic independent four wheels steering system. And an analysis conducted about the real model 4WS vehicle was manufactured for using in factory to transport heavy loads by unmanned. Afterward, the effect of the converted presence of the Ackerman geometry in steering performance is simulated and examined.