Eventos Anais de eventos
COBEM 2023
27th International Congress of Mechanical Engineering
Modeling and validation of the longitudinal dynamics of a 2WD vehicle with mechanically driven CVT
Submission Author:
André de Souza Mendes , SP
Co-Authors:
Rodrigo Silva, Guilherme Maia, BRUNO JOSE SILVA, Gabriel Batista Macedo, Caio Rolemberg, André de Souza Mendes
Presenter: Rodrigo Silva
doi://10.26678/ABCM.COBEM2023.COB2023-1662
Abstract
The use of simulators and fully digital models are increasingly used in engineering to develop and evaluate diverse experimental projects. The benefits of simulation models are evident, for instance, in the development of vehicles with mechanically driven continuously variable transmission (CVT). Obtaining these vehicle setups through purely practical means is usually prohibitive, considering the time, material, and high labor required to achieve this. Therefore, this research uses MATLAB software to develop and validate a computational model of the longitudinal dynamics of a 2WD vehicle equipped with a mechanically driven CVT transmission. With this model, it is possible to reduce the cost and time of development and tuning of the CVT. The FEI Baja 2WD prototype is used in this research, whose design criteria are based on the Baja SAE BRASIL competition. This research is divided into three major parts: model development, vehicle data collection, and model validation. Regarding model development, MATLAB/SIMULINK is used to create the simulation model of the system that includes the dynamics of the CVT transmission and the longitudinal dynamics of the vehicle. Regarding data collection and validation, the setup's performance is assessed through the vehicle acceleration with wide-open throttle and measuring engine RPM and the rotational speed of the driving wheels. Evaluating the model's performance in predicting the real vehicle behavior allows for verifying where divergences occur, indicating improvement points, and developing methods to validate the model. This paper presents a preliminary result using the current version of the proposed model with good agreement between the experimental and simulated results.
Keywords
modeling, Validation, Longitudinal dynamics, CVT, BAJA SAE, MATLAB, simulink
