Abstract
Keywords: anti roll bar, stability, roll stiffness, axle characteristic, weight transfer
Nowadays more and more papers are written about Active Anti Roll Bars (AARB). These systems are usually designed for vehicles with high center of gravity, and their purpose is to change the roll stiffness of the vehicle, thus preventing a potential roll-over. In the present paper the use of AARB will be analyzed from a different perspective. An actuator will be presented which allows the proper control of vehicle's yaw stability. First, the basic vehicle dynamic laws are described that show, why and how it is possible to control the handling of the car, with the different stiffness on the front and rear anti roll bars. It is followed by the description of the applied vehicle model, which helps to analyze the effects of the ARB parameters. Simulated tests are presented, that shows how the over- and understeer characteristics of the car vary as the ARB parameters are modified. Finally some basic conclusion are drawn about the applicability of the possible control laws for such system.