Control of active suspension systems using the singular perturbation method

Abstract In a quarter-car model, an active suspension system with nonlinear characteristics is investigated here. An active suspension model is obtained by two-time-scale modeling. A new control method that is based on the singular perturbation approach is proposed. The full system is decomposed into the slow and fast subsystems, which have relations to road holding and ride quality respectively. The control laws for both subsystems are combined to form the control law for the full model. The advantage of the new design approach is shown by the simulation results and an experimental study.