Virtual tuning of shock absorber characteristics based on vehicle dynamic performances

To optimize the damping characteristics of the vehicle,a dynamic model with lumped parameters was built for the shock absorber to reflect physical effects of its valve systems and it was embedded in an E-Class vehicle model of CarsimTM using the S-Function.Taking the vehicle dynamic performances as the optimization objectives,the front and rear axle damping characteristics of the vehicle were tuned using the non-dominated sorting genetic algorithm(NSGA-Ⅱ)under frequency sweep conditions.The computation results show that vehicle dynamic performances concerned are grealty improved after virtual tuning of the shock absorber.