Controle SDRE aplicado em suspensão veicular com amortecedor magneto-reológico

Abstract

Since car was developed, vehicular suspension is an object of research and study. The function of the suspension system of a vehicle is to minimize vertical acceleration, isolating passengers from shocks and vibrations promoting comfort, reducing fatigue which benefits the health and safety of drivers. This work presents a proposal for the control of vehicle suspension using an SDRE controller applied to the magneto-rheological damper. The efficiency of the proposed control can be evidenced through computational simulations using a quarter-car nonlinear mathematical model and a half-car nonlinear mathematical model. The analysis of the controller's performance is performed considering the excitations caused by irregularities of the road represented by step input and sinusoidal. Computational simulations were performed using Matlab®. The simulation results show that the proposed control improves the vehicle's dirigibility by reducing the vertical displacement of the wheel and also contributes to the passengers' comfort by reducing oscillations in the vehicle's body. In addition, simulations of parametric variations were performed in order to verify the behavior of the proposed control in face of uncertainties. Parametric studies demonstrate that control remains stable, even when subjected to parametric variations.