Parameter Optimization And Test Research Of Hydraulically Interconnected Energy-regenerative Suspension

During the damping process,through the friction between Oil and pipe wall the hydraulically interconnected suspension absorbs the impact and attenuating vibration caused by road excitation to ensure the vehicle handling stability and riding comfort.Generally,this part of the energy is dissipated to the air in the form of heat energy,which has not been effectively utilized.To solve the problem above,the hydraulically interconnected energy-regenerative suspension is designed,which is based on electromechanical integration theory and the principle of Wheatstone bridge.Firstly,starting from the characteristics research of energy consumption,the hydraulically interconnected suspension energy consumption mode is build.The energy consumption of various hydraulic components under different conditions are also analyzed.The results show that with the increasing of vehicle velocity and road level variation,the energy consumption of all hydraulic components in the interconnected suspension system increases,which provides theoretical support for the subsequent feasibility study of the hydraulically interconnected energy-regenerative suspension.Secondly,aiming at the problem which the energy consumption of the damping valve is relatively large,the hydraulic actuator is redesigned by analyzing and comparing the existing energy-regenerative structures.The structure and working principle of the hydraulically interconnected energy-regenerative suspension is introduced.Full vehicle model of the suspension system is established in AMESim,the effects of the hydraulically interconnected energy-regenerative suspension and the traditional hydraulic interconnected suspension on riding comfort and handing stability are compared by simulation.Then,in order to solve the problem which the dynamic performance of the hydraulically interconnected energy-regenerative suspension is slightly worse than the traditional one,the AMESim model is integrated by Isight optimization platform,and 8suspension parameters are selected for DOE analysis.The spring stiffness and the hydraulic cylinder diameter are extracted as the design variables according to the PARETO graph.The ?-method is used to calculate the weight coefficient of evaluation indexes which include riding comfort,handing stability and energy regenerative performance.Then,an optimization on the design variables is conducted with NSGA-?genetic algorithm in Isight.According to the simulation result,both vehicle dynamic performance and energy regenerative effect are optimized.Finally,in order to verify the correctness of the above theory,the principle prototype of the hydraulically interconnected energy-regenerative suspension system is designed.The bench test of vehicle is performed on a sinusoidal road and a random road using the4-poster road simulator.The dynamic performance of the suspension before and after optimization is compared and analyzed.The test results are consistent with the simulation,which validates the feasibility of the suspension structure and the effectiveness of the optimization results.It accumulates practical experience and lays theoretical for vehicle application of the hydraulically interconnected energy-regenerative suspension.