Abstract
Generally speaking, the vehicle dynamics performance is mainly governed by some trade-off relations. Especially, ride and handling performance should be handled based on this consideration. In case of the driving straight, the driver wants a smooth ride without left hand side and right hand side connection. Otherwise, when the car is in cornering, the vehicle has to have acceptable body roll with respect to the lateral acceleration. For the case, roll stiffness acts as vehicle parameters and could be a control factor for each case, if necessary. In this paper, we studied the vehicle level performance with passive stabilizer bar clarification based on the trade-off relation on ride and handling performance through the simple vehicle roll dynamic model and CAE (Computer Aided Engineering) method with stabilizer bar. And then we analyzed how to overcome this situation using another solution with theoretical basic. The one of approaches is control system could be ARC (Active Roll Control Stabilizer Bar System). It could be considered as a solution of the improvement on this trade-off to reduce and to compensate for the roll dynamics during cornering by changing the wheel normal forces at each axle. The purpose of an ARC (Active Roll Control Stabilizer Bar System) is to eliminate the compromise between ride and handling performance that is inevitable with the use of a passive stabilizer bar. Based on the study with passive stabilizer bar, we showed a proposal of ARC system control strategies. The strategies for ARC control have been developed along with a reliable simulation environment with CAE method and benchmarking vehicle test. This research arranges the ARC functionality and performance limits using by vehicle dynamic simulation and benchmarking vehicle test. And then we had executed the vehicle test which is built-in proto-ARC system. The proto-ARC system had been applied on target SUV vehicle. This experimental data from the vehicle would be brought into series production prove the performance of the ARC system. Finally, we showed the improvement of vehicle dynamics properties using Active Roll Control Stabilizer Bar system.
Keywords: Stabilizer Bar, ARC (Active Roll Control Stabilizer Bar System), Vehicle Body Roll, Roll Gradient, Total Lateral Load Transfer Distribution (TLLTD)