| With the continuous development of national economy and various engineering project development, engineering vehicles get more extensive use. However, with its relatively poor suspension performance and poor working conditions in work process, engineering vehicles produce more fierce vibration than regular passenger cars,which may cause serious physical and mental health and influence the quality of work. Therefore, the seat suspension system,could ease the vibration of the rough road to human body without change vehicle suspension,has the important theoretical and practical significance.This paper studies the seat suspension damping system aims to improve the engineering vehicles driving comfort and propose an improved semi-active seat suspension of magneto-rheological damper based on the existed one,which adopt instead of traditional passive damper. This kind of damper with simple structure, little energy consumption and very suitable for machineshop truck. According to the domestic and foreign relevant research, the paper established a hyperbolic tangent hysteresis model with magneto-rheological damper, emulated and analysed its properties. Considering the pavement react on the vehicle vibration, the integral white noise pavement random incentive model is established. In order to reflect the vibration response on different human body part,11 degree-of-freedom dynamics model is established.The vehicle-seat human 14 degree-of-freedom and 16 degree-of-freedom mathematical model and mechanics model is respectively established on the base of 1/4 and 1/2 vehicle model.The semi-active seat suspension system based on magneto-rheological damper with the PID controller for the system is established,and the whole system in Matlab/Simulink environment simulation analysis. The simulation results show that the semi-active seat suspension based on magneto-rheological damper can effectively reduce the react of vehicle vibration on human body,and improve the seat comfort.
|
PDF Full Text Request