158 / 2021-03-31 16:02:05

Mechanical Performance Evaluation of Magnetorheological Damper

Magnetorheological damper,Performance evaluation index,Indicator curve

Vibration Testing and Sensing techniques

    Magnetorheological damper has several advantages such as fast response, stable performance, and low energy consumption. It is widely used in vibration reduction. However, the conventional mechanical performance evaluation of the magnetorheological damper aims at the maximum output damping force, while rarely attempts in the response time and indicator curve's fullness. The single performance evaluation index is difficult to achieve the optimization of the magnetorheological damper. In this study, the maximum output damping force, response time, and fullness of the magnetorheological damper's indicator curve were evaluated by experimental test under different external excitation current and excitation velocity. The results showed that the maximum output damping force increased with the increasing of the external excitation current and was lowlily affected by the piston velocity. The response time of the magnetorheological damper decreased with the increase of the piston velocity. It was lowlily affected by the value of step current, but the step-down response time of the magnetorheological damper was longer than the step-up response time. The insufficient filling of magnetorheological fluid and improper selection of the volume compensation device's gas pressure can distort the indicator curve and decrease the magnetorheological damper's energy dissipation. The research results provide a reference for the optimization of the performance of the magnetorheological damper.