Vibration Reduction Of Seat Suspension Based On Magnetorheological Damper

Vibration is an important factor in the ride comfort of a vehicle.The long-term low-frequency high-intensity vibration will greatly affect the driver’s health.Because of the poor road conditions and the poor vehicle suspension performance,military vehicles in the driving process will have a greater vibration.So,it is very important to reduce the vibration.Seat is a components which is direct contact with the human body.It is important to reduce the vibration of the seat.Compared with the traditional damper,the MR damper has the characteristics of continuous and stepless damping.By changing the input current of the magnetorheological damper,you can achieve the different force of the damping.Through some control strategies,MR damper can choose the appropriate damping force according to the motion of the seat.Therefore,the MRF semi-active seat suspension is the focus of current seat vibration control research.In this paper,the RD-8040-1 magneto-rheological damper of Lord company is studied.The damping force of the damper is solved by Bouc-Wen model,and the performance of the damper is tested.The dynamic characteristics of the damper are analyzed.Considering the strong non-linearity of Bouc-Wen model,the parameters of Bouc-Wen model are identified by genetic algorithm.The simulation model of damper is established by Simulink.The experimental results are compared with the simulation results.Secondly,the relationship between the damping ratio and the transmission rate of the seat suspension is analyzed.A five degree of freedom man-chair dynamic model is established to study the effect of vibration on human comfort.Finally,the control method of semi-active seat is analyzed.The on-off semi-active control and fuzzy control of the semi-active seat suspension are adopted to establish the control strategy and simulation model.The damping effect of the Magnetorheological damper semi-active seat under different control strategies is compared.