Dinámica Lateral mediante Matlab

El presente Trabajo de Fin de Grado tiene como objetivo el estudio de un modelo de simulación de la dinámica lateral de un vehículo utilizando el programa MATLAB. Para ello, implementaremos diferentes test y maniobras muy utilizados en la industria automovilística en el diseño y testeo de prototipos. En este trabajo se hará mención igualmente a las diferencias existentes en la respuesta entre los diferentes tamaños de automóviles. Además estudiaremos los resultados desde el punto de vista de dos modelos, uno linealizado para pequeños ángulos y otro modelo completo de cara a determinar las situaciones de validez de ambos desarrollos.The objective of this paper is the study of lateral dynamics in vehicles. To do that, we will perform simulations of differente test and manouvers, that are often performed in industry, using Matlab. Besides, we will test a variety of models with the purpose of seeing how the results change. This model is composed of 2 differents parts, one with a lineal theory and one with a complete theory. After all the tests, it will be discussed the range of validity of both models.Universidad de Sevilla. Grado en Ingeniería de Tecnologías Industriale

Multi-Objective Sliding Mode Control on Vehicle Cornering Stability with Variable Gear Ratio Actuator-Based Active Front Steering Systems

Active front steering (AFS) is an emerging technology to improve the vehicle cornering stability by introducing an additional small steering angle to the driver’s input. This paper proposes an AFS system with a variable gear ratio steering (VGRS) actuator which is controlled by using the sliding mode control (SMC) strategy to improve the cornering stability of vehicles. In the design of an AFS system, different sensors are considered to measure the vehicle state, and the mechanism of the AFS system is also modelled in detail. Moreover, in order to improve the cornering stability of vehicles, two dependent objectives, namely sideslip angle and yaw rate, are considered together in the design of SMC strategy. By evaluating the cornering performance, Sine with Dwell and accident avoidance tests are conducted, and the simulation results indicate that the proposed SMC strategy is capable of improving the cornering stability of vehicles in practice