The effect of active roll control based on predictive control and roll moment distribution control(RDC) which utilizes understeer gradient are investigated. The results of predictive control is compared with that of feedforward control which uses lateral acceleration as control signal. RDC can improve dynamic stability of a vehicle. In drastic cornering, according to nonlinear characteristic of tire side force about tire vertical load, tire side force balance of both axle can be controlled by RDC which distributes the active roll moments to the front and rear suspensions to prevent the spin and drift. The effect of proposed control methods are studied by the simulation based on 10 d.o.f. nonlinear vehicle model.
