Eventos Anais de eventos
DINAME 2023
XIX International Symposium on Dynamic Problems of Mechanics
OPTIMIZATION AND CONTROL OF A 6X6 MILITARY VEHICLE’S ACTIVE SUSPENSION SYSTEM
Submission Author:
Jefferson Gomes de Carvalho Souza , RJ
Co-Authors:
Jefferson Gomes de Carvalho Souza, Elias Dias Rossi Lopes, Taís Gomes de Carvalho Souza, Gustavo Simão Rodrigues
Presenter: Gustavo Simão Rodrigues
doi://10.26678/ABCM.DINAME2023.DIN2023-0101
Abstract
In military vehicles, the suspension system performs an essential role in stability, driveability and comfort, being responsible to reduce vibrations induced by ground irregularities, which provides the increasement of suspension and vehicle components life cycle. In this context, the objective of this work is to analyze the dynamic time domain response of an active front suspension model in a space-state formulation, obtaining through multibody modeling the optimized response for the system, taking into consideration the main variables of interest: control force and reduction of the speed of the suspended mass. The first closed-loop control system designed is the Poles Placement (FSFB), designed by some project restrictions and parameters, based exclusevely on the closed-loop eigenvalues. In order to find the best fit for the controller closed-loop transfer function parameters, a Genetic Algorithm (GA) associated with LQR model is developed, intended to produce an optimal model for the controller. In order to simplify the controller design, the plant parameters are, at first, equivalent to a quarter-car model of a 6X6 Military Vehicle, and the results obtained are simulated through MATLAB/Simulink® for an independent front suspension as first step, and finally for a half-car model, aimed to understand the vertical dynamics phenomenon including variables as pitch and gravity center speed.
Keywords
Vertical Dynamics, Multi-Objective Optimization, Genetic Algorithms, Full State Feedback, Control Systems
