Improvement of Four Wheel Steering System

Abstract

The aim of this study is improving the vehicle safety and driver comfort. Four Wheel Steering (4WS) is used with Lane Keeping System (LKS) for confirmation the efficiency of the integrated controller. A two-degree-of-freedom model is used for simulation. Simulation is described for different driver models, different speeds on the vehicle with controllers. As seen from the simulation results, 4WS helps to the vehicle not to swerve but increase lateral displacement and driver workload. LKS is used to solve this problem. 4WS is supported by LKS. System is evaluated using performance indexes. Simulation results show that using the driver assistance systems together, improves vehicle safety and driver comfort.