Optimal Design of MR Damper and Dynamic Characteristics

摘要

Magnetorheological(MR)fluid dampers offer rapid variation in damping properties in a reliable fail-safe manner and low power consumption.These characteristics make them ideal for semi-active control in structures and vehicle applications in order to efficiently suppress vibration.This paper describes the design,manufacturing and characterizing of a prototype MR damper.The MR damper’s working principle is discussed and governed equations are derived by using Bingham plastic model.The optimal dimensions of the MR damper are obtained by finite element analysis.Furthermore,the Bouc-Wen model is used to describe the dynamic characteristics of the prototype MR damper.All optimized parameters in model are obtained by a least-squares optimization method.Theoretical and experimental results demonstrate that the model can describe the dynamic characteristics of the MR damper accurately,thus can be used to implement semi-active suspension control system with the MR damper in vehicle.