Aplicação da Simulação Hardware in the Loop para testes e desenvolvimento de suspensões veiculares

Abstract

LOPES, Afonso Martins Revidiego. Application of the Hardware in the Loop simulation for testing and development of vehicular suspensions. 2017. Dissertation (Master). Faculty of Mechanical Engineering. Universidade Estadual de Campinas. Campinas. A vehicle suspension system usually consists of a spring and a damper. These springdamper assemblies in practice have nonlinear features that are difficult to model mathematically. Due to the complexity of modelling these components the application of the Hardware in the Loop simulation (HIL) is recommended. In Hardware in the Loop simulation, one part of the system is computationally simulated (software), and another part, which has the complex characteristics of being modeled, is physically incorporated into the system (hardware). Thus, this dissertation describes the application of the Hardware in the Loop simulation to analyze the dynamic behavior of a vehicle where the two rear suspension are the physical components of the system and all the other parts of the vehicle are simulated.Different types of rear suspensions are tested, a system with conventional suspensions and a system with hydropneumatic suspensions. The objective is to apply the HIL simulation to compare the use of these two types of suspension systems. For the simulations it is used a mathematical model with seven degrees of freedom, in order to represent a complete vehicle with four wheels, implemented in Matlab ® . The model parameters correspond to real values of a vehicle, whose characteristics have been identified in laboratory. The experimental results obtained are compared and analyzed, showing that it is possible to use the HIL simulation for testing and development of vehicular suspensions.