Experimental Study and Design on Automobile Suspension Made of Magneto-Rheological Damper

Magneto-rheological (MR) damper is an intelligent damper, which is used as automobile suspension for vibration semi-active control. A single piston rod MR damper with an accumulator was designed in order to satisfy with the demand of a certain automobile front suspension. The damper structural parameters were obtained by integrated optimal design combining magnetic circuit and structure. Magnetic circuit was analyzed by means of finite element method. The calculating formula derivation of damping force of MR damper with an accumulator was also achieved. Then the properties of designed damper were investigated by experiments, and the relationship between damping force, circuit and speed was fitted by the experimental results. This work provided promising method for the experimental study and design on automobile suspension made of MR damper.