Design Sliding Mode Controller for Automotive Electric Power Steering Based on Simulation-in-the-Loop
摘要
This paper proposes a Sliding Mode Controller (SMC) for an Electric Power Steering (EPS) system. EPS has become the most prevalent steering system in modern automobiles due to its advantages in stability, smoothness, and comfort compared to other power-assisted steering mechanisms. The system handles road reaction torque to ensure that the rack position accurately follows the intended steering input across various driving scenarios. A Simulation-in-the-Loop (SIL) framework, utilizing co-simulation between MATLAB/Simulink and CarSim, is employed to develop and validate the controller. For comparison, a Proportional-Integral-Derivative (PID) controller is designed using the same EPS and vehicle models. Simulation results demonstrate that the SMC minimizes rack position deviation, remains stable under road torque, reduces oscillations, effectively balances road reaction forces, and improves the overall steering experience.