A New Methodology to Describe Non-Linear Characterization Depending on Temperature of a Semi-Active Absorber Based on Bouc-Wen Model

Abstract

The nonlinear behavior of semi-active magneto-rheological (MR) absorbers should be described for improving control algorithms. Also, overheating in the working conditions of the MR absorber due to current excitation and high damping velocity seriously changes the characteristic of the MR fluid and causes problems for controllability. The relationship between damping performance and temperature must be defined in the control algorithms that control the absorber when used in a system such as structure, vehicle, and medical haptic. In this work, a new methodology has been presented to describe dynamic behaviours of MR absorber depending on temperature based on the Bouc-Wen model. Seven parameters in the Bouc-Wen model have been evaluated depending on temperature. Thus, damper force has been defined depending on temperature with a single equation that significantly simplifies the control process. When the experimental and the model results have been compared, it was shown that the error rates varied between %0.89 and %8.4. The average errors of the displacement, time and velocity have been 1.75%, 6.6%, and 4.4%, respectively.