The Application of Nonlinear Energy Sinks Controller in a Full Car Semi-Active Suspension System with MR Dampers

摘要

In this paper,a Nonlinear Energy Sink(NES)controller is designed and used to control semiactive suspension system with MR dampers.A full car model with seven degrees of freedom is developed and used to demonstrate the effectiveness of the NES controller.The proposed controller relies in its operation on specially designed nonlinear spring elements which are attached to the primary suspension system in order to induce optimal nonlinear vibration energy sinks.Four MR dampers are designed,manufactured and integrated with four independent NES controllers.Performance of the full car semi-active suspension system with NES controllers is evaluated both in the time and frequency domains.The obtained performance characteristics are compared with those of passive suspension and suspension using classical LQR controller.Simulation results show that the vibration energy transmitted by road disturbance has been successfully attenuated and the best possible ride comfort and handling performance can be potentially achieved by the proposed NES controller.It is also seen that the cost function of energy consumption using the NES controller is less than that using the LQR controller.The obtained results demonstrate the potential of the NES controller as an effective means for attenuating the vibration of vehicle suspension systems.