Rollover Control Strategy Based on Vehicle Stability Control System

To enhance the rollover control function of vehicles in extreme conditions, a vehicle dynamics model with 8 degrees of freedom covering yaw and roll motions was established, and an integrated control strategy with emergency roll control was proposed based on the direct yaw control of the traditional electronic stability control (ESC) system. The roll coefficient was calculated using the vehicle lateral acceleration provided by the standard ESC sensor. The emergency roll control was activated when the roll coefficient exceeded its reference value, and the vehicle rollover got controlled effectively by adjusting the lateral acceleration in time. The results of fishhook test simulation on direct yaw control and integrated control show that under the direct yaw control strategy, the vehicle has the ability to resist rollover under continuous small steering wheel angle, but cannot resist rollover in extreme conditions with a big steering wheel angle. In contrast, the integrated control strategy improves the ability to resist the rollover in the extreme conditions and enhances the rollover control function of the vehicle ESC system.