Research On Electromagnetic Valve Type Continuous Variable Damper Semi-active Suspension

This paper mainly studies the electromagnetic valve type continuous variable damper and its control strategy. Firstly, based on the analysis of the structure of this type of damper, the mathematical model of the damper valve system and the hydraulic model of the system are established, and using Matlab software analysis of the theoretical and simulation test of the valve system so that carried out.it. Then, the hydraulic system model is established by AMESim,and the Simulink is combined with the simulation analysis. The control strategy of semi-active suspension is studied to improve the ride comfort of the vehicle.The main research contents of this paper are as follows:The electromagnetic valve type continuously variable damping shock absorber is improved on the basis of the ordinary double tube structure vibration damper. First, the electromagnetic valve type continuously variable damping shock absorber structure characteristics and operation mechanism were based on the analysis of, based on the theory of vehicle dynamics, hydraulic theory and fluid finite element knowledge, the establishment of shock absorber valve system equation and valve connects the equation of force equilibrium equations,valve outlet fluid mechanics equations, a valve plate deformation. Then use the Matlab tool to solve the pressure flow relationship of the shock absorber valve system, and the shock absorber characteristic influence factors were analyzed by Matlab for the shock absorber parameters matching and further analysis of the characteristics of suspension and the vehicle ride comfort for.AMESim hydraulic system model of electromagnetic valve type continuous variable damper. The influence of structural parameters on the damping characteristics of the damper is studied by simulation and analysis. Semi-active suspension is divided into four one of the dynamic model is established, using filter white noise method established single wheel road excitation time domain model, based on using the left and right round the track coherent delay between the relations and the front and back wheels of the four-wheel road excitation of parametric time domain model is established.Design of vehicle semi-active suspension controller based on adaptive fuzzy PID control method. The effectiveness of the designed controller is verified by the joint simulation of Simulink and AMESim, which provides a theoretical reference for the use of the electromagnetic valve type continuous variable damper for the real vehicle.