Research On The Control Of Active Suspension Energy Feed And Energy Supply Device Based On Electromagnetic Linear Actuator

As an important component of a vehicle,the active suspension system can improve the vibration reduction characteristic and the ride comfort of the vehicle,but which requires energy consumption.With the development of electromagnetic linear actuator(EMLA)technology,the EMLA instead of the traditional damper began to be applied to the suspension system,which could effectively solve the contradiction between active control and energy consumption.Firstly,the electromagnetic force performance and the power generation characteristic of the EMLA designed for a certain vehicle suspension system have been researched,the specific thrust coefficient is 89 N/A and the maximum output voltage is 105 V.According to this result,a feedback energy circuit consisting of H bridge rectifier,DC-DC power converter and composite power accumulator is designed,and a power supply circuit composed of a full bridge inverter and power supply is created.Then,the Fuzzy PID controller is designed based on the topology of the feedback energy circuit and the actuator model,and the system model is established in the Simulink.Simulation is carried out with motion velocity as input excitation,and the results show that the feedback energy device proposed in this paper can effectively achieve energy recovery.In order to verify the results of the simulation,the test bench is built for a specific test.By comparing the simulation results with the experimental results,the correctness and effectiveness of the feedback energy system are further verified.Finally,according to the power supply circuit topology and 1/4 active suspension model,the hierarchical control system is proposed.The energy supply system model is established in Simulink,and the simulation is carried out under the 60 km/h to grade C road.The results show that the body acceleration,suspension travel and tire dynamic displacement are improved.Meanwhile,the 1/4 active suspension test bench is built,and the vibration excitation of the active suspension platform is excited by the vibration platform.The sprung mass acceleration and the suspension travel are reduced by 25%and 20%respectively under the active control,which verifies the vibration damping characteristics of the electromagnetic active suspension system in principle.