Research on Road Sense Simulation of Steer-By-Wire System

Since the steering information cannot be transmitted through the mechanical structure in the steer-by-wire system, and the road feel needs to be generated by simulation, a effective road feel design is extremely important for the vehicle steering system. Aiming at the road-feeling design problem of the steer-by-wire system and, based on the nonlinear 3 freedom degrees vehicle model, this paper proposes a road information planning method with multi-information fusion by analyzing the road feel generation mechanism and the currently used road-feeling design method. First, the assist torque and compensation torque are obtained by analyzing the influence of vehicle speed and variable transmission ratio on the road feel, which is superimposed on the steering resistance torque calculated by the dynamic model to form the road feel. The simulation results show that the road feel planning method enables the driver to obtain accurate road conditions, perceive the real-time driving status of the car, and realize the real-time, comfort and stability of the road feel to a certain extent.