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

Due to small roads and slippery conditions, driving in urban areas can be dangerous for most vehicles because the tires will easily slip. However, the risk can be reduced if the vehicles have improved performance and controllability. Here, 4 Wheel Steering (4WS) Small Electric Vehicle (SEV) control for driving is addressed as a solution for the problem. Here, we proposed the Intelligence Steering Control System (ISCS) on the 4WS SEV. ISCS will compare the drivers demand to the dynamics of the SEV and the circumstances surrounding the vehicle, road conditions and vehicle stability. Then, ISCS will control all 4 wheels driving or braking torque and steering angles independently. This enables the vehicle to move under the safest conditions. In normal steering, only front wheel is used to make cornering. In opposite steering, both front and rear wheels will turn in opposite direction for cornering. With the results, we prove that the usage of opposite steering in the 4WS SEV can increase the cornering performance.