Magnetorheological damper dedicated modelling of force-velocity hysteresis using all-pass delay filters

Abstract

The paper presents a novel approach to the problem of forcevelocity characteristics modelling dedicated to MR dampers. It is stated that velocity and control dedicated dynamic signal paths need to be included in MR damper model. It is shown that hysteretic behaviour may be modelled using all-pass delay filters located in the velocity dedicated signal path. Parameters of the presented model are estimated using measurement data obtained by means of Material Testing System (MTS). Experiments are performed for damper excitation frequencies assumed within range of 0.5 Hz – 2.5 Hz and control current levels restricted within 0.05 A – 1.0 A. Parameters of delay filters are estimated and accuracy of the reference acceleration based hysteresis model and referred model based on delay filters are compared. Results demonstrate that delay filters based model maps MR damper dynamics, mainly hysteretic behaviour, with high accuracy.