Eventos Anais de eventos
COBEM 2019
25th International Congress of Mechanical Engineering
MODELING AND OPTIMIZING A VEHICLE SUSPENSION CONSIDERING USER SAFETY AND COMFORT IN AN IRREGULAR ROAD
Submission Author:
Julio Basilio , RJ
Co-Authors:
Julio Basilio, José Geraldo Telles Ribeiro, Francisco José Soeiro
Presenter: Julio Basilio
doi://10.26678/ABCM.COBEM2019.COB2019-0774
Abstract
A vehicular suspension should reconcile parameters that result in comfort and safety for vehicle users, however, as presented in this study, these characteristics are conflicting when if seek optimal values for the stiffness and damping of suspension. This study aims to obtain reliable answers and analyzes for the initial design stage of a suspension project, through the mathematical development of a simplified model of quarter of car with two degrees of freedom. According to the references, the criterion of comfort is related to vertical acceleration of the suspended mass, due to the human perception of the vibration resulting from the irregularities of the road. In addition, it is known that the safety of the ride is directly linked to the contact force between the tire and the track, and consequently, the total force on the wheel. Using the developed model, simulations for the study the behavior of the suspension system were performed in MATLAB software. As input to the system, a mathematical model representing classes of road profiles was used. The system response to road profile confirms the conflict between user comfort and safety criteria, evidencing the need to use optimization methods to find optimal values for suspension parameters.
Keywords
quarter car model (QCM), safety and comfort criteria, Vehicular Dynamics, quarter-car model, Irregular road profile, suspension system, Genetic Algorithms
