A yaw stability control system (18) is enhanced to include roll stability
control function for an automotive vehicle and includes a plurality of sensors
(28-39) sensing the dynamic conditions of the vehicle. The sensors may include
a speed sensor (20), a lateral acceleration sensor (32), a yaw rate
sensor (28) and a longitudinal acceleration sensor (36). The controller
(26) is coupled to the speed sensor (20), the lateral acceleration
sensor (32), the yaw rate sensor (28) and a longitudinal acceleration
sensor (36). The controller (26) generates both a yaw stability feedback
control signal and a roll stability feedback control signal. The priority of achieving
yaw stability control or roll stability control is determined through priority
determination logic. If a potential rollover event is detected, the roll stability
control will take the priority. The controller for roll stability control function
determines a roll angle of the vehicle from the lateral acceleration sensor signal
and calculates the feedback control signal based on the roll angle.