ENHANCING CAR RIDE COMFORT USING A BALANCED CONTROLLER DESIGN FOR SEMI-ACTIVE SUSPENSION SYSTEM

Abstract

Automobile ride comfort quality is an important factor in car design. There are some approaches that can be used to improve this characteristic, in which the researchers in Vietnam and in the world are interested in the semi-active suspension system. This paper presents a balance control method applied to the semi-active suspension system with two control strategies including on-off and continuous balance controllers. The main idea of this method is that the force of the controlled damping will change, so that the magnitude of the force is equal to that of the spring, but the direction of the forces is the opposite. This will reduce the vertical acceleration of the vehicle body. The simulation results in the time domain have been clearly shown by using the balance control methods. The root mean square of the vertical displacement, pitch angle and their accelerations decrease by 25-50%, compared to the passive suspension system.