A New Method of Parameters Identification for Magnetorheological Damper Model

doi:10.3901/JME.2018.06.062

Abstract

Abstract: A new method of parameters identification to magnetorheological(MR) dampers is proposed. By using the new method, all unknown parameters are estimated about the influence on output damping force of models, then the best controlling parameters are chosen without any prior knowledge about these parameters. A series damping force values of MR dampers are measured through experiments on test rig, when the excitation amplitude, frequency and current are chosen as various values. The model of Bouc-Wen is built in Simulink software, and the objective function is set as the error between simulation and experiment results. The parameters of MR damper model is identified by using genetic algorithm(GA) and pattern search(PS). The controlling parameters of damping force are chosen according to their effect on damping force, and the function between controlling parameters and current values are calculated by using Curve Fitting Toolbox. The above model is expanded according to the curve fitting results, and all unknown parameters are identified. The identification results are confirmed by experiment results to various excitation amplitude and frequency. The comparison results show that the model identification is correct, and the hysteresis characteristic of MR dampers is described. At last, the identification method proposed in this paper can be used not only in Bouc-Wen model, but also in other models of MR dampers.

Key words: controlling parameters of damping force, hysteresis characteristic, magnetorheological dampers, parameters identification

CLC Number:

TG156

LIU Yongqiang, YANG Shaopu, LIAO Yingying. A New Method of Parameters Identification for Magnetorheological Damper Model[J]. Journal of Mechanical Engineering, 2018, 54(6): 62-68.

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