Modeling, simulation and validation of 14 DOF full vehicle model

An accurate full vehicle model is required in representing the behavior of the vehicle in order to design vehicle control system such as yaw control, antiroll control, automated highway system etc. There are many vehicle models built for the study of the vehicle dynamics specifically for the ride and handling behavior. This paper describes the vehicle model development of the vehicle model to study the behavior of the vehicle. The derivation of a 14 DOF vehicle model consisting of ride, handling and tire model is presented. The Magic tire formula was used as tire model. All the assumptions made for the 14 DOF vehicle model are stated. This 14 DOF vehicle model will be then validated using instrumented experimental vehicle for two steering inputs namely step steer and double lane change. The deviation of the outputs specifically the yaw rate, lateral acceleration and roll angle of the vehicle body and also the slip angle at each of the tire from the 14 DOF model simulation from the experimental results is discussed.