Coordinate optimization of semi-active energy regenerative suspension with EHA

Abstract

In order to coordinate the damping performance and energy regenerative performance of energy regenerative suspension, this paper proposes a structure of vehicle semi-active energy regenerative suspension with electro-hydraulic actuator (EHA). On the basis of system principle, the nonlinear model of the semi-active energy regenerative suspension with EHA is established. Meanwhile, LQG control strategy is designed. And then the influence of the main parameters of EHA on the damping performance and energy regenerative performance of suspension are analyzed. Eventually, the main parameters of EHA actuator are optimized via genetic algorithm. The results show that the spring mass acceleration RMS value of optimized EHA semi-active energy regenerative suspension is reduced by 18.60% and energy regenerative power RMS value is increased by 40.51%, which means under meeting the certain vehicle ride comfort and driving safety requirements, energy regenerative performance is improved significantly.