Hysteretic Behavior of Magnetorheological Fluid and Identification Using Preisach Model

This study examines the field-dependent hysteretic behavior of a magnetorheological (MR) fluid and its identification using a Preisach model. The field-dependent shear stress of a commercially available MR fluid is measured using a parallel disk rheometer, and its shear stress versus shear rate hysteretic behavior is measured. To demonstrate the applicability of the Preisach model to MR fluid hysteresis modeling, two significant properties are empirically studied; the minor loop property and the wiping-out property. Using these data, the Preisach model for the MR fluid is identified using experimental first order descending curves. The effectiveness of the identified hysteresis model is verified in the time domain by comparing the reconstructed to the measured field-dependent shear stress. In addition, the identified hysteresis is compared to the conventional Bingham model.