A CENTRAL CONTROLLER DESIGN FOR ACTIVE SUPPENSION AND ACTIVE ANTI-ROLL BAR SYSTEMS ON AUTOMOBILES

Abstract

The demand for cars around the world is increasing, of which two important
criteria that customers want are the comfort and the road safety. Car
manufacturers are also always aiming to improve the car quality with these two
criteria. To improve the comfort criteria, the active suspension is the most
effective solution, meanwhile for the road safety, it is the active anti-roll bar
system. In this paper, the authors use the optimal control method LQR to build a
central controller for these two systems to improve simultaneously the comfort
and the road safety when the car is moving. The simulation results on the time
domain and frequency domain clearly show the effectiveness of the proposed
controller when reducing the desired signals by over 30% compared to the cars
use the normal passive suspension system.