Theoretical And Experimental Researches On A Self-Powered Magneto Rheological Dampers

The vehicle play a more and more important role in the people’s daily lives and the national economy lives,so the ride comfort and safety of vehicle is more important than before. The vehicle should have a superior suspension system to raise the ride comfort and the operation stability on different road.The paper aims to design a self-powered magnetorheological damper,compared to the passive damper, which coordinates the ride comfort and the operation stability;compared to the active pamper,which does not need the extra energy to create the dampering force.The self-powered damper transform the vehicle vibration energy to magnetic field energy,because of the magnetorheological effect,this magnetic field will change the resistivity of viscosity of the magnetorheological,and make the magnetorheological solidification to create a great dampering force.The damper performance test is using an adjustable amplitude and frequency sinusoidal signals to excite the piston rod.The function relationship between the damper displacement and the dampering force can be builded by analysing of the reciprocating motion of the piston rod’s the velocity, displacement and damping force. The sinusoidal signal is composed of a servo system,This paper studys the way how the servo system creates the sinusoidal signal.