Design Of Active Suspension Control System Based On Electromagnetic Linear Actuator

Suspension is an important component of the automobile chassis,and the performance of the suspension system directly affects the ride comfort of the vehicle.Traditional passive suspensions cannot balance ride and stability.The active suspension can adjust the thrust force according to the road conditions,which can optimize the performance of the suspension.Therefore,this paper proposes an active suspension based on an electromagnetic linear actuator,and designs the control scheme of its control system,as well as software and hardware.This has a great significance for the study of active suspension.For the proposed active suspension based on the electromagnetic linear actuator,this paper first creates the mechanical model of active suspension by ADAMS and the mathematical model of linear actuator and road input by MATLAB/Simulink,which lay the foundation for the co-simulation research of the control system.Then according to the linear relationship between the output thrust and the current of the linear actuator,a layered control scheme is proposed for the control system of the active suspension.The upper controller uses the Fuzzy-PID controller to calculate the ideal force according to the vertical acceleration of the body,and the lower controller uses the vector control to drive the linear actuator.Then the model of the control strategy is modeled in MATLAB / Simulink,and the feasibility of the control scheme is analyzed by co-simulation.The simulation results show that compared with the passive suspension,the active suspension with the control scheme can reduce the vertical body acceleration,the dynamic displacement of suspension and the dynamic load of tire,which can effectively improve the smoothness of vehicles.Finally,in order to verify the effectiveness of the co-simulation results,TMS320F28335 DSP is used as the core chip to design the hardware and software of the controller.On this basis,combined with the d SPACE,the Hardware-in-the-loop simulation test of the active suspension control system is carried out.The simulation results are compared with the test results to further verify the effectiveness of the designed control system.