Nonlinear full-car model for optimal dynamic design of an automotive damper

Abstract

In this paper a nonlinear full-car model, comprising the dynamic behavior of the suspension system, which includes the body displacement, body acceleration, wheel displacement, tire deformation, suspension travel, suspension geometry, pitch and roll has been designed. The main improvement introduced to this model is that it considers the nonlinearities caused by the geometry of the suspension system and includes a detailed tire model. This is used by a dynamic optimization methodology in order to improve the passenger comfort and the vehicle safety, which are represented by the chassis displacement and the contact area of the tires, respectively. The optimization algorithm used to solve the problem at hand is a multi-objective artificial bee colony algorithm (MOABC). As result of the optimization a set of nondominated solutions is presented.