RESEARCH ON CONTROLLING THE ACTIVE ANTI-ROLL BAR SYSTEM OF DOUBLE DECKER BUSES

Abstract

Double-decker buses are increasingly playing an important role in passenger
and travel transportation worldwide. Currently, most of double-decker buses are
equipped with the passive anti-roll bar system, but due to the high load and high
center of gravity, the rollover accident of this type of vehicle always cause serious
consequences. The paper presents the design of an optimal controller for the
active anti-roll bar system on both axles in order to improve the vehicle's roll
stability. Signals that are considered to be optimal include roll angle, lateral
acceleration and normalized load transfer at the two axles. Simulation results on
the time and frequency domain clearly show the effectiveness of the proposed
controller with the reduction of evaluation signals about 45% compared to buses
using the passive anti-roll bar system.