COMPARISON BETWEEN PASSIVE AND ACTIVE FLEXIBLE ANTI-ROLL BARS MODELLED BY FINITE ELEMENT METHOD ON PREVENTION OF VEHICLE ROLLOVERS

Abstract

Anti-roll bars aims to increase the driving comfort by reducing the roll angle during cornering
and also assist the self-steering behaviour of the vehicle chassis. This paper presents a comparison between a
passive anti-roll bar and an active anti-roll bar. The bars are modelled by FEM (Finite Element Method) and
a controller LQG (Linear Quadratic Gaussian) is designed to the active system. In addition, the vehicle lateral
dynamic is hybridized to the exible model in order to obtain an unique mathematical model. It reviews the
vehicle roll dynamics and describes the FEM applied to dynamic modelling of exible structures. The in uence
of the active anti-roll system is illustrated through numerical simulation, and a comparison among the passive
anti-roll system and the system without anti-roll is also presented. To the best of the authors' knowledge, the
modelling approach presented in Sections 3.1 and 3.2 have not been reported in the literature.