Modelling and simulation of motor vehicle suspension system

In this work, using a quarter-car model was adopted, the equations of motion were derived for passive and then sky-hook semi-active suspension systems. The differential equations, solved Dormand-Prince pair numerical formula, used to simulate values displacements as affected by damping coefficients constant. simulated results showed that maximum amplitude sprung mass, which is linked ride discomfort, increases while those unsprung masses, affects road holding ability, decreases with increasing depth pothole. Furthermore, both masses varied directly coefficient. Finally, constant semi active system increases, amplitudes increases. It was, thus, shown vertical vehicle bodies wheels are dependent on potholes, coefficient constant, gave better result compared system. Therefore, applying control principle, desired comfort passengers can be achieved well reduced rate car damage cost maintenance.