The vibrational behaviour of the vehicle at the road humps with different suspension systems

Abstract

It is well known that bad ride comfort in vehicles is produced from the suspension system. Therefore, researchers and car manufacturers are interested in improving the vibrational behaviour of the vehicle while travelling over humps. Several systems have been modified such as the semi-active suspension, which led to an improvement in the vehicle's vibrational behaviour. In this study, the vibrational behaviour of the car was studied while travelling over different types of bumps using semi-active and passive suspension systems, with the results being compared between them. A mathematical model is introduced to study the vibrational behaviour of the vehicle when travelling over various types of road humps such as the circular hump, square hump, and circular bump, using a passive and a semi-active model. The parameters investigated to evaluate the ride comfort are the body vertical acceleration, the suspension working space, the dynamic tyre load, and the displacement of the body.