MR damper hysteresis characterization for the semi-active suspension system

Abstract

This thesis presents the nonlinear MR brake to a semi active suspension system (e.g. of a vehicle suspension). Semi-active control has recently received considerable attention in some years, because its strong potential to control devices without imposing heavy power demands. The dynamic response characteristics of the damper are captured in data collection, random input signals were used for angular velocity and current input. The relationship between the current and damping force in magneto-rheological brake is nonlinear but in the reality it is possible to control the current of MR brake to reduce the vibration of the system as much as possible, because the nonlinearity of the model depends on the current and angular velocity. The first part of this project describes the vibration suppression in passive, active and semi active suspension. Subsequently several mathematical models are used to simulate and analyze hysteresis behavior of magneto-rheological brake. The second part of this work is devoted to derivation of the dynamic model equation of the experimental setup. The last part presents the evaluation of the dynamic simulation modeling results with the full-scale experimental data. In particular, special attention is paid to comparison with the Bouc-Wen model analysis.