Modeling and system identification of a quarter car suspension using Simulink

Abstract

Quarter car suspension is easy to understand, due to which it is usually used to study the car dynamics. The objective of this paper is to analyze the behavior of a Quarter car model for sine wave input with variable frequencies and identify the suspension system using Simulink. The Simulink model of a suspension system is derived using mathematical equations which are derived using spring-mass-damper diagram with two degrees of freedom. The evaluated equations are in terms of sprung-unsprung mass displacement and accelerations. The study gives the identified suspension system for sine input. Also with increase in frequency, there is decrease in overshoot and setting time of system.