DYNAMIC MODELING AND ANALYSIS OF CAR SUSPENSION SYSTEM

Abstract

The vehicle suspension system is generally considered as the linkage between the vehicle body and wheels. The main task of the suspension system is to provide a comfortable and safe ride. The good ride quality requires high damping setting at low frequencies to stifle pitch, and lower damping setting at higher frequencies to prevent harshness. However, to improve handling performance, springs and dampers must be made stiffer at all frequencies to reduce body attitude. The design of a better-quality suspension system remains an important development objective for the automotive industry. An ideal vehicle suspension system should have the capability to reduce the displacement and acceleration of the vehicle body, and thus; maximizing the ride comfort. Present work analyzed the dynamic behavior of a road car through bond graph technique, where vertical dynamics has been evaluated. However, simulation of this model has been carried out on Symbol Sonata software which use the fourth order Runge-Kutta method. Furthermore, vertical acceleration of a road car are examined through OROS 36 system. These obtained data is used to validate the simulation results. Present work also includes the different types of suspension system such as passive, semi-active and active suspension system, where physical and mathematical model of car suspension system has been evaluated, which may further be used to analyze the car suspension system.