Stability Control Strategy for Vehicles under Single-Wheel Brake-by-Wire Failure Conditions

The electromechanical brake-by-wire (EMB) system offers advantages such as high braking accuracy, fast response, and compact structure, and has become a major development direction for electric vehicles. However, the lack of necessary redundancy limits its large-scale application. Therefore, a stability control strategy is proposed, which is implemented at the algorithm level. According to braking intensity, the brake failure scenarios are classified into three levels: mild, moderate, and severe. For mild braking, a brake-force reconstruction strategy is adopted to compensate for the failed wheel. For moderate braking, a combined brake-force reconstruction and fuzzy sliding-mode steering control strategy is employed for active front-wheel steering. For severe braking, a brake-force reconstruction and model predictive control (MPC)-based active steering strategy is applied to achieve precise control of vehicle stability. The results show that the control strategy effectively compensates for single-wheel brake failure and ensures vehicle safety and stability across different braking intensities.