Research on Control of a 4 Wheel Steering Electric Vehicle with Intelligence Steering Control System

摘要

Due to the small and slippery road condition, driving in urban area can be dangerous for most vehicles because the tire will be easily slipped. However, the risk can be reduced if the vehicles have improved performance and controllability. Here, 4 Wheel Steering (4WS) Electric Vehicle (EV) control for driving is addressed as a solution for the problem. We proposed the Intelligence Steering Control System (ISCS) on 4WS Small Electric Vehicle (SEV). ISCS is a system that will automatically change the vehicle condition to assist the driver. ISCS will compare the drivers demand to the dynamics of SEV and the circumstances around the vehicle, road conditions and vehicle stability. Then, ISCS will control all 4 wheels driving or braking torque and steering angle independently. This enables the vehicle to move on its safest condition. In this paper, we reported the first step of ISCS where it control a SEV in parallel steer driving. In parallel steer driving, the tires will be in the same direction but with different angle. SEV will make a turning based on the difference between front and rear tire angles. For the results, we proved that the usage of 4WS SEV can increase the cornering performance without affecting its stability.