Eventos Anais de eventos
DINAME 2017
XVII International Symposium on Dynamic Problems of Mechanics
Response analysis of bicycle model, three 3 DOF and multibody simulation compared with experiments on track and determination of their limits of utilization.
Submission Author:
Roberto Bortolussi , SP , Brazil
Co-Authors:
Roberto Bortolussi
Presenter: Roberto Bortolussi
doi://10.26678/ABCM.DINAME2017.DIN17-0195
Abstract
Simplified models are widely used in all areas of engineering with the purpose of estimating the responses of systems. In automotive engineering this is not different. However, knowing the limits of the use of a simplified model is crucial to guarantee correctness of the responses obtained with these models. The present work aims at explicitly deriving two different simplified mathematical models commonly used by the automotive community, and that sometimes are incorrectly derived, compare them with a multibody model correlated with a physical prototype on limit handling and steady state. This work will address the vehicle dynamics equations used for the mathematical modeling of two simplified models, bicycle model and three DOF. The equations were derived until the models are presented in state space. A multibody correlation with experimental test is described in this work. A graphical comparison shall be done based on yaw rate, lateral acceleration and rolling angle from the real vehicle responses versus a multibody model and versus both simplified models, verifying the differences between them. As a conclusion of this work, results differences was determined for the simplified models, different lateral acceleration from the usual 0.3 and 0.5 g, extensively used in papers that make use of these models.
Keywords
Vehicle Dynamics, CAE, Bicycle Model, 3 DOF model, Multibody model
