Vehicle Suspension Systems Control: A Review

increased competition on the automotive market has forced companies to research alternative strategies to classical passive suspension systems. In order to improve handling and comfort performance, instead of a conventional static spring and damper system, semi-active and active systems are being developed. An active suspension system has been proposed to improve the ride comfort. A quarter-car 2 degree-of-freedom (DOF) system is designed and constructed on the basis of the concept of a four-w heel independent suspension to simulate the actions of a n active vehicle suspension system. The purpose of a suspension system is to support the vehicle body an d increase ride comfort. The aim of the work describe d in this paper is to illustrate the application of inte lligent technique to the control of a continuously damping automotive suspension system. The ride comfort is improved by means of the reduction of the body acceleration caused by the car body when road disturbances from smooth road and real road roughness. The paper describes also the model and controller u sed in the study and discusses the vehicle response res ults obtained from a range of road input simulations. In the conclusion, a comparison of active suspension intel ligent control and classical control is shown.