Abstract
KEY WORDS:
Vehicle Dynamics, Modeling and Simulation, Active Rear Steering, Cosimulation, Lateral Transient Response
ABSTRACT:
A three-dimensional model of a sports car with non-linear suspension and tire characteristics was assembled in a multi-body dynamics software ADAMS/Car. An additional rack and pinion rear wheel steering subsystem was built-in, with an independent active control of the pinion rotation. Several rear wheel steering control strategies based on a single-track vehicle model were implemented in Matlab/Simulink. The vehicle model and the control systems were cosimulated in an open loop and in a closed loop driving maneuver. The control strategies that formulate the rear steer angle as a function of steering wheel angle, vehicle speed and yaw velocity, significantly improve vehicle's transient response.